List of earthquakes in 1968 explained

Year:1968
Location Map:Earth
Largest: Japan, off the east coast of Honshu (Magnitude 8.2) May 16
Deadliest:, South Khorasan Province (Magnitude 7.1) August 31 10,488 deaths
Fatalities:12,081
9.0+:0
8.0−8.9:1
7.0−7.9:21
6.0−6.9:67
5.0−5.9:2

This is a list of earthquakes in 1968. Only magnitude 6.0 or greater earthquakes appear on the list. Lower magnitude events are included if they have caused death, injury or damage. Events which occurred in remote areas will be excluded from the list as they wouldn't have generated significant media interest. All dates are listed according to UTC time. Maximum intensities are indicated on the Mercalli intensity scale and are sourced from United States Geological Survey (USGS) ShakeMap data. There was a large resurgence in activity in 1968. 22 magnitude 7.0+ earthquakes struck various parts of the planet. The largest of these was a magnitude 8.2 event in Japan in May. Large aftershocks struck the area following the mainshock. New Zealand and Indonesia had some upheaval during the year. The high activity contributed to over 12,000 deaths across the world. The vast majority of this total was caused by a destructive event in Iran in August with nearly 10,500 deaths. Events in the Philippines, Italy and Indonesia also had significant fatalities.

Overall

By death toll

RankDeath tollMagnitudeLocationMMIDepth (km)Date
1, South Khorasan Province
2, Razavi Khorasan Province
3 Philippines, Luzon
4 Italy, Sicily
5 Indonesia, Minahassa Peninsula
6 Japan, off the east coast of Honshu
7, West Azerbaijan Province
8 Turkey, offshore Bartin Province
= 9 Greece, Aegean Sea
= 9 Mexico, Chiapas
10 Mexico, Oaxaca
11 Peru, Loreto Region

By magnitude

RankMagnitudeDeath tollLocationMMIDepth (km)Date
1 Japan, off the east coast of Honshu
2 Japan, off the northeast coast of Honshu
= 3 Philippines, Luzon
= 3 Indonesia, Molucca Sea
= 4 Japan, off the east coast of Kyushu
= 4 Indonesia, Papua (province)
5, Kuril Islands, Russia
= 6 Australia, southeast of New Ireland (island), Papua and New Guinea
= 6 New Zealand, Kermadec Islands
= 6 Mexico, Oaxaca
= 6 United Kingdom, Solomon Islands
= 6 Japan, Bonin Islands
= 7 Greece, Aegean Sea
= 7 New Zealand, South Island
= 7 Indonesia, Minahassa Peninsula
= 8, off the east coast of
= 8, South Khorasan Province
= 8 New Zealand, Kermadec Islands
= 9 New Zealand, Kermadec Islands
= 9, Kuril Islands, Russia
= 9 Japan, off the east coast of Honshu
= 9 Australia, off the north coast of mainland Papua and New Guinea

Notable events

January

Month:January
8.0–8.9:0
7.0–7.9:1
6.0–6.9:6
5.0–5.9:1
Largest:7.4 Mw, Russia
Deadliest:6.4 Mw Italy
216 deaths
Fatalities:224
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[1] 4.6 5.0 Despite being a moderate magnitude there was some property damage. Costs were $2 million (1968 rate).
[2] [3] 6.4 30.0
[4] [5] , off the east coast 6.1 35.0
[6] [7] [8] 6.4 10.0 216 people were killed and 563 were injured in the 1968 Belice earthquake. Extensive destruction was caused in the area with costs reported at $320 million (1968 rate). 216 563
[9] [10] 6.7 27.5
[11] 5.1 33.0 8 people were killed and 55 more were injured. Some damage was reported. Aftershock. 8 55
[12] [13] 6.8 30.6
[14] [15] 7.4 36.9
[16] 6.1 33.0 Aftershock.

February

Month:February
8.0–8.9:0
7.0–7.9:3
6.0–6.9:2
Largest:7.3 Mw Australia, Papua and New Guinea
Deadliest:7.2 Mw Greece
20 deaths
Fatalities:24
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[17] 6.6 23.5 Aftershock.
[18] [19] [20] 7.3 30.0 Some damage was reported.
[21] [22] [23] 7.2 15.0 The 1968 Aegean Sea earthquake killed 20 people and injured 18 more. 500 homes were destroyed and 1,951 were damaged. Costs were $600,000 (1968 rate). 20 18
[24] [25] [26] 6.2 10.0 During the 1968 Ebino earthquake, 3 people were killed and some damage was reported.3
[27] 4.9 0.0 1 person was killed and 4 were hurt. 100 homes collapsed. 1 4
[28] [29] , off the east coast of 7.1 25.0

March

Month:March
8.0–8.9:0
7.0–7.9:0
6.0–6.9:4
Largest:6.4 Mw Tonga
Deadliest:4.6 Mw Kenya
1 death
Fatalities:1
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[30] [31] 6.3 35.0
[32] [33] 6.1 35.0 Aftershock.
[34] [35] 6.3 45.0
[36] 6.4 109.1
[37] 4.6 33.0 1 person was killed and another was injured. Some property damage was caused. 1 1

April

Month:April
8.0–8.9:0
7.0–7.9:1
6.0–6.9:4
5.0–5.9:1
Largest:7.5 Mw Japan
Deadliest:5.3 Mw
38 deaths
Fatalities:39
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[38] [39] [40] [41] 7.5 34.2 1 person was killed and 22 were injured in the 1968 Hyuga-nada earthquake. Some homes were destroyed in both the earthquake and a subsequent tsunami. 1 22
[42] [43] 6.8 30.0 Aftershock.
[44] [45] 6.6 10.0 Some damage was caused by the 1968 Borrego Mountain earthquake.
[46] 6.2 30.0
[47] [48] 6.1 30.0
[49] 5.3 34.0 38 people were killed and 100 were injured. 1,000 homes were destroyed. Damage costs were $1 million (1968 rate). 38 100

May

Month:May
8.0–8.9:1
7.0–7.9:5
6.0–6.9:6
Largest:8.2 Mw Japan
Deadliest:8.2 Mw Japan
52 deaths
Fatalities:55
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[50] [51] 6.7 160.1
[52] [53] [54] [55] 8.2 29.9 52 people were killed and 330 were injured in the 1968 Tokachi earthquake. A tsunami was generated which contributed to the destruction. 1,218 homes were destroyed. Damage costs were $131 million (1968 rate). A large number of aftershocks followed. To prevent cluttering only those measuring above magnitude 6.5 will be listed. 52 330
[56] [57] 7.9 25.0 Aftershock.
[58] 6.5 25.0 Aftershock.
[59] 6.5 43.0 Aftershock.
[60] 6.3 20.0 South of the aftershock sequence from May 16 event.
[61] 7.0 55.0 Doublet earthquake.
[62] 6.9 50.0
[63] 7.0 28.3
[64] [65] [66] 7.2 20.0 The 1968 Inangahua earthquake caused 3 deaths and $3 million (1968 rate) worth of damage. 3
[67] 6.6 27.6 Aftershock.
[68] [69] 7.5 45.0

June

Month:June
8.0–8.9:0
7.0–7.9:1
6.0–6.9:3
Largest:7.0 Mw Japan
Deadliest:6.8 Mw Peru
15 deaths
Fatalities:15
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[70] [71] 6.7 35.0
[72] [73] 6.2 38.0 Aftershock.
[74] [75] 7.0 32.1 Aftershock of May 16 event.
[76] [77] [78] 6.8 15.0 15 people were killed and some property damage was caused. Costs were $100,000 (1968 rate). 15

July

Month:July
8.0–8.9:0
7.0–7.9:1
6.0–6.9:6
Largest:7.3 Mw New Zealand
Fatalities:0
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[79] [80] 6.1 60.6
[81] [82] 6.4 57.9
[83] [84] 6.0 45.0
[85] [86] 6.3 47.0
[87] [88] [89] 7.3 45.0 Some damage was caused.
[90] [91] 6.2 20.0
[92] [93] Peru, off the north coast of 6.5 31.8

August

Month:August
8.0–8.9:0
7.0–7.9:6
6.0–6.9:9
5.0–5.9:0
Largest:7.6 Mw 2 events
Deadliest:7.1 Mw
10,488 deaths
Fatalities:10,976
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[94] [95] [96] [97] 7.6 25.0 The 1968 Casiguran earthquake caused 270 deaths and 261 injuries. Some homes were destroyed and many were damaged. Costs were around $8 million (1968 rate). A tsunami was generated which left 1 person dead. 270 261
[98] [99] [100] 7.3 25.0 18 people were killed. Property damage was $2.4 million (1968 rate). 18
[101] [102] 6.7 15.0
[103] [104] 6.4 25.0 Aftershock.
[105] [106] 6.1 100.0
[107] [108] 6.8 45.7
[109] [110] [111] 7.6 23.0 Some damage was caused.
[112] 6.5 25.0 Aftershock.
[113] [114] 6.0 20.0
[115] [116] [117] 7.2 20.0 200 people were killed and 58 were injured in a tsunami triggered by the 1968 Sulawesi earthquake. 800 homes were destroyed. 200 58
[118] [119] 7.3 543.1
[120] 6.5 15.0
[121] 6.3 533.6
[122] [123] 6.4 20.0 Aftershock.
[124] [125] [126] 7.1 10.0 The 1968 Dasht-e Bayaz and Ferdows earthquakes caused major destruction in northeast Iran. 10,488 people were killed and over 17,000 were injured. 12,000 homes were destroyed. $35 million (1968 rate) of costs were reported. 10,488 17,000

September

Month:September
8.0–8.9:0
7.0–7.9:1
6.0–6.9:13
Largest:7.1 Mw New Zealand
Deadliest:6.2 Mw
700 deaths
Fatalities:747
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[127] [128] [129] 6.2 15.0 This was a strong aftershock of the 1968 Dasht-e Bayaz and Ferdows earthquakes. 700 additional deaths were caused and 1,500 homes were destroyed. 700
[130] [131] [132] 6.3 20.0 24 people were killed and 200 were injured. 2,000 homes damaged or destroyed. 24 200
[133] [134] 6.3 30.0
[135] [136] 6.1 142.3
[137] [138] 6.2 25.0
[139] [140] 6.8 35.0
[141] [142] 6.1 65.0 Aftershock.
[143] [144] [145] 6.5 103.4 3 people were killed and some damage was caused. 3
[146] [147] 6.7 58.3
[148] 6.2 15.0
[149] [150] [151] 6.0 124.8 20 people were killed and some damage was caused. 20
[152] 7.1 50.0
[153] [154] 6.4 15.0
[155] [156] 6.1 65.0

October

Month:October
8.0–8.9:0
7.0–7.9:2
6.0–6.9:6
Largest:7.3 Mw Japan
Fatalities:0
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[157] 7.3 500.0
[158] [159] 6.5 35.0
[160] [161] 6.1 48.9
[162] [163] [164] 6.5 15.0 The 1968 Meckering earthquake caused property damage with costs reaching $2.2 million (1968 rate).
[165] [166] , off the east coast of 6.2 22.5
[167] [168] [169] 7.0 15.0 Some damage was caused.
[170] 6.3 45.0
[171] [172] 6.7 10.0

November

Month:November
8.0–8.9:0
7.0–7.9:0
6.0–6.9:3
Largest:6.5 Mw, Vanuatu
Fatalities:0
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[173] 6.5 597.0
[174] 6.1 175.7
[175] [176] 6.1 35.0

December

Month:December
8.0–8.9:0
7.0–7.9:0
6.0–6.9:5
Largest:6.6 Mw Australia, Papua and New Guinea
Fatalities:0
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[177] [178] 6.1 20.0
[179] [180] 6.0 10.0
[181] 6.6 15.0
[182] [183] 6.3 109.6
[184] [185] 6.0 44.1

Notes and References

  1. Web site: Significant Earthquake: NICARAGUA: MANAGUA. National Geophysical Data Center. February 25, 2021. January 4, 1968. January 23, 2022. https://web.archive.org/web/20220123024951/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4423. live.
  2. Web site: M 6.4 - Atacama, Chile. United States Geological Survey. May 12, 2017. January 6, 1968. May 2, 2024. https://web.archive.org/web/20240502095320/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem827036/executive. live.
  3. Web site: M 6.4 - Atacama, Chile. United States Geological Survey. February 25, 2021. January 6, 1968. May 2, 2024. https://web.archive.org/web/20240502095310/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem827036/impact. live.
  4. Web site: M 6.1 - Taiwan region. United States Geological Survey. May 12, 2017. January 13, 1968. May 2, 2024. https://web.archive.org/web/20240502095306/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem827209/executive. live.
  5. Web site: M 6.1 - Taiwan region. United States Geological Survey. February 25, 2021. January 13, 1968. May 2, 2024. https://web.archive.org/web/20240502095314/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem827209/impact. live.
  6. Web site: M 6.4 - Sicily, Italy. United States Geological Survey. May 12, 2017. January 15, 1968. May 2, 2024. https://web.archive.org/web/20240502095323/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem827285/executive. live.
  7. Web site: M 6.4 - Sicily, Italy. United States Geological Survey. February 25, 2021. January 15, 1968. May 2, 2024. https://web.archive.org/web/20240502095320/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem827285/impact. live.
  8. Web site: Significant Earthquake: ITALY: SICILY. National Geophysical Data Center. February 25, 2021. January 15, 1968. May 2, 2024. https://web.archive.org/web/20240502095310/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4425. live.
  9. Web site: M 6.7 - Solomon Islands. United States Geological Survey. May 12, 2017. January 19, 1968. May 2, 2024. https://web.archive.org/web/20240502095859/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem827419/executive. live.
  10. Web site: M 6.7 - Solomon Islands. United States Geological Survey. February 25, 2021. January 19, 1968. May 2, 2024. https://web.archive.org/web/20240502095913/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem827419/impact. live.
  11. Web site: Significant Earthquake: ITALY: SICILY. National Geophysical Data Center. February 25, 2021. January 25, 1968. May 2, 2024. https://web.archive.org/web/20240502095907/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/8852. live.
  12. Web site: M 6.8 - Flores region, Indonesia. United States Geological Survey. May 12, 2017. January 26, 1968. May 2, 2024. https://web.archive.org/web/20240502100002/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem827666/executive. live.
  13. Web site: M 6.8 - Flores region, Indonesia. United States Geological Survey. February 25, 2021. January 26, 1968. May 2, 2024. https://web.archive.org/web/20240502095902/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem827666/impact. live.
  14. Web site: M 7.4 - Kuril Islands. United States Geological Survey. May 13, 2017. January 29, 1968. May 2, 2024. https://web.archive.org/web/20240502095937/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem827772/executive. live.
  15. Web site: M 7.4 - Kuril Islands. United States Geological Survey. February 25, 2021. January 29, 1968. May 2, 2024. https://web.archive.org/web/20240502095905/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem827772/impact. live.
  16. Web site: M 6.1 - Kuril Islands. United States Geological Survey. May 13, 2017. January 29, 1968. May 2, 2024. https://web.archive.org/web/20240502095906/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem827807/executive. live.
  17. Web site: M 6.6 - Kuril Islands. United States Geological Survey. May 13, 2017 . February 4, 1968.
  18. Web site: M 7.3 - New Ireland region, Papua New Guinea. United States Geological Survey. May 13, 2017 . February 12, 1968.
  19. Web site: M 7.3 - New Ireland region, Papua New Guinea. United States Geological Survey. February 25, 2021 . February 12, 1968.
  20. Web site: Significant Earthquake: PAPUA NEW GUINEA: NEW IRELAND. National Geophysical Data Center. February 25, 2021 . February 12, 1968.
  21. Web site: M 7.2 - Aegean Sea. United States Geological Survey. May 13, 2017. February 19, 1968. May 6, 2021. https://web.archive.org/web/20210506143742/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem826342/executive. live.
  22. Web site: M 7.2 - Aegean Sea. United States Geological Survey. February 25, 2021 . February 19, 1968.
  23. Web site: Significant Earthquake: GREECE: AEGEAN SEA: ST EUSTRATIOS. National Geophysical Data Center. February 25, 2021. February 19, 1968. February 14, 2021. https://web.archive.org/web/20210214012059/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4428. live.
  24. Web site: M 6.2 - Kyushu, Japan. United States Geological Survey. May 13, 2017 . February 21, 1968.
  25. Web site: M 6.2 - Kyushu, Japan. United States Geological Survey. February 25, 2021. February 21, 1968. June 16, 2021. https://web.archive.org/web/20210616042838/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem826420/impact. live.
  26. Web site: Significant Earthquake: JAPAN: KYUSHU. National Geophysical Data Center. February 25, 2021. February 21, 1968. June 24, 2021. https://web.archive.org/web/20210624195249/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4429. live.
  27. Web site: Significant Earthquake: ALGERIA: EL ALEN (BABORD). National Geophysical Data Center. February 25, 2021 . February 25, 1968.
  28. Web site: M 7.1 - Taiwan region. United States Geological Survey. May 13, 2017 . February 26, 1968.
  29. Web site: M 7.1 - Taiwan region. United States Geological Survey. February 25, 2021 . February 26, 1968.
  30. Web site: M 6.3 - Mindanao, Philippines. United States Geological Survey. May 13, 2017 . March 5, 1968.
  31. Web site: M 6.3 - Mindanao, Philippines. United States Geological Survey. February 25, 2021 . March 5, 1968.
  32. Web site: M 6.1 - Mindanao, Philippines. United States Geological Survey. May 13, 2017 . March 5, 1968.
  33. Web site: M 6.1 - Mindanao, Philippines. United States Geological Survey. February 25, 2021 . March 5, 1968.
  34. Web site: M 6.3 - New Britain region, Papua New Guinea. United States Geological Survey. May 13, 2017. March 7, 1968. May 2, 2024. https://web.archive.org/web/20240502101417/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem824753/executive. live.
  35. Web site: M 6.3 - New Britain region, Papua New Guinea. United States Geological Survey. February 25, 2021. March 7, 1968. May 2, 2024. https://web.archive.org/web/20240502101419/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem824753/impact. live.
  36. Web site: M 6.4 - Tonga. United States Geological Survey. May 13, 2017. March 11, 1968. May 2, 2024. https://web.archive.org/web/20240502101418/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem824904/executive. live.
  37. Web site: Significant Earthquake: KENYA: HOMA BAY, USIRI, GOT KOKECH. National Geophysical Data Center. February 25, 2021. March 20, 1968. May 2, 2024. https://web.archive.org/web/20240502101435/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/8187. live.
  38. Web site: M 7.5 - Shikoku, Japan. United States Geological Survey. May 18, 2017. April 1, 1968. May 2, 2024. https://web.archive.org/web/20240502101439/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem823387/executive. live.
  39. Web site: M 7.5 - Shikoku, Japan. United States Geological Survey. February 25, 2021. April 1, 1968. May 2, 2024. https://web.archive.org/web/20240502101440/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem823387/impact. live.
  40. Web site: Significant Earthquake: JAPAN: KYUSHU, SHIKOKU. National Geophysical Data Center. February 25, 2021. April 1, 1968. July 27, 2022. https://web.archive.org/web/20220727102059/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4432. live.
  41. Web site: Tsunami Event: SEIKAIDO. National Geophysical Data Center. February 25, 2021. April 1, 1968. May 2, 2024. https://web.archive.org/web/20240502101434/https://www.ngdc.noaa.gov/hazel/view/hazards/tsunami/event-more-info/1998. live.
  42. Web site: M 6.8 - Shikoku, Japan. United States Geological Survey. May 18, 2017 . April 1, 1968.
  43. Web site: M 6.8 - Shikoku, Japan. United States Geological Survey. February 25, 2021 . April 1, 1968.
  44. Web site: M 6.6 - 5km NNE of Ocotillo Wells, CA. United States Geological Survey. May 18, 2017. April 9, 1968. May 2, 2024. https://web.archive.org/web/20240502101844/https://earthquake.usgs.gov/earthquakes/eventpage/ci3329122/executive. live.
  45. Web site: M 6.6 - 5km NNE of Ocotillo Wells, CA. United States Geological Survey. February 25, 2021. April 9, 1968. May 2, 2024. https://web.archive.org/web/20240502101846/https://earthquake.usgs.gov/earthquakes/eventpage/ci3329122/impact. live.
  46. Web site: M 6.2 - Samoa Islands region. United States Geological Survey. May 18, 2017. April 26, 1968. May 2, 2024. https://web.archive.org/web/20240502101846/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem824329/executive. live.
  47. Web site: M 6.1 - Michoacan, Mexico. United States Geological Survey. May 18, 2017. April 26, 1968. May 2, 2024. https://web.archive.org/web/20240502101904/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem824353/executive. live.
  48. Web site: M 6.1 - Michoacan, Mexico. United States Geological Survey. February 25, 2021. April 26, 1968. May 2, 2024. https://web.archive.org/web/20240502101855/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem824353/impact. live.
  49. Web site: Significant Earthquake: IRAN: MAKU,SHAH BANDALU,QURTA BOLAGH,QONDEQLI. National Geophysical Data Center. February 25, 2021. April 29, 1968. May 2, 2024. https://web.archive.org/web/20240502101845/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4434. live.
  50. Web site: M 6.7 - Ryukyu Islands, Japan. United States Geological Survey. May 18, 2017. May 14, 1968. May 2, 2024. https://web.archive.org/web/20240502101903/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem821902/executive. live.
  51. Web site: M 6.7 - Ryukyu Islands, Japan. United States Geological Survey. February 25, 2021 . May 14, 1968.
  52. Web site: M 8.2 - off the east coast of Honshu, Japan. United States Geological Survey. May 18, 2017. May 16, 1968. July 14, 2021. https://web.archive.org/web/20210714234307/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem821946/executive. live.
  53. Web site: M 8.2 - off the east coast of Honshu, Japan. United States Geological Survey. February 25, 2021 . May 16, 1968.
  54. Web site: Significant Earthquake: JAPAN: OFF EAST COAST OF HONSHU ISLAND. National Geophysical Data Center. February 25, 2021. May 16, 1968. August 27, 2023. https://web.archive.org/web/20230827134925/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4438. live.
  55. Web site: Tsunami Event: OFF EAST COAST OF HONSHU ISLAND. National Geophysical Data Center. February 25, 2021. May 16, 1968. April 15, 2024. https://web.archive.org/web/20240415043500/https://www.ngdc.noaa.gov/hazel/view/hazards/tsunami/event-more-info/2000. live.
  56. Web site: M 7.9 - Hokkaido, Japan region. United States Geological Survey. May 18, 2017 . May 16, 1968.
  57. Web site: M 7.9 - Hokkaido, Japan region. United States Geological Survey. February 25, 2021 . May 16, 1968.
  58. Web site: M 6.5 - off the east coast of Honshu, Japan. United States Geological Survey. May 18, 2017 . May 16, 1968.
  59. Web site: M 6.5 - off the east coast of Honshu, Japan. United States Geological Survey. May 19, 2017. May 16, 1968. May 2, 2024. https://web.archive.org/web/20240502102210/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem822187/executive. live.
  60. Web site: M 6.3 - near the east coast of Honshu, Japan. United States Geological Survey. May 19, 2017. May 19, 1968. May 2, 2024. https://web.archive.org/web/20240502102302/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem822332/executive. live.
  61. Web site: M 7.0 - Kermadec Islands, New Zealand. United States Geological Survey. May 19, 2017. May 20, 1968. May 2, 2024. https://web.archive.org/web/20240502102248/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem822391/executive. live.
  62. Web site: M 6.9 - Kermadec Islands, New Zealand. United States Geological Survey. May 19, 2017. May 20, 1968. May 2, 2024. https://web.archive.org/web/20240502102217/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem822409/executive. live.
  63. Web site: M 7.0 - east of the Kuril Islands. United States Geological Survey. May 19, 2017. May 20, 1968. May 2, 2024. https://web.archive.org/web/20240502102249/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem822412/executive. live.
  64. Web site: M 7.2 - South Island of New Zealand. United States Geological Survey. May 20, 2017. May 23, 1968. May 22, 2022. https://web.archive.org/web/20220522180139/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem822588/executive. live.
  65. Web site: M 7.2 - South Island of New Zealand. United States Geological Survey. February 26, 2021. May 23, 1968. May 2, 2024. https://web.archive.org/web/20240502102223/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem822588/impact. live.
  66. Web site: Significant Earthquake: NEW ZEALAND: SOUTH ISLAND: NW COAST. National Geophysical Data Center. February 26, 2021. May 23, 1968. May 2, 2024. https://web.archive.org/web/20240502102239/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4440. live.
  67. Web site: M 6.6 - off the east coast of Honshu, Japan. United States Geological Survey. May 20, 2017 . May 24, 1968.
  68. Web site: M 7.5 - near the north coast of Papua, Indonesia. United States Geological Survey. May 20, 2017 . May 28, 1968.
  69. Web site: M 7.5 - near the north coast of Papua, Indonesia. United States Geological Survey. February 26, 2021 . May 28, 1968.
  70. Web site: M 6.7 - Sulawesi, Indonesia. United States Geological Survey. May 20, 2017 . June 7, 1968.
  71. Web site: M 6.7 - Sulawesi, Indonesia. United States Geological Survey. February 26, 2021 . June 7, 1968.
  72. Web site: M 6.2 - Sulawesi, Indonesia. United States Geological Survey. May 20, 2017. June 7, 1968. May 2, 2024. https://web.archive.org/web/20240502102706/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem819969/executive. live.
  73. Web site: M 6.2 - Sulawesi, Indonesia. United States Geological Survey. February 26, 2021. June 7, 1968. May 2, 2024. https://web.archive.org/web/20240502102804/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem819969/impact. live.
  74. Web site: M 7.0 - off the east coast of Honshu, Japan. United States Geological Survey. May 20, 2017. June 12, 1968. May 2, 2024. https://web.archive.org/web/20240502102801/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem820211/executive. live.
  75. Web site: M 7.0 - off the east coast of Honshu, Japan. United States Geological Survey. February 26, 2021. June 12, 1968. May 2, 2024. https://web.archive.org/web/20240502102716/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem820211/impact. live.
  76. Web site: M 6.8 - northern Peru. United States Geological Survey. May 20, 2017. June 19, 1968. June 18, 2022. https://web.archive.org/web/20220618121729/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem820734/executive. live.
  77. Web site: M 6.8 - northern Peru. United States Geological Survey. February 26, 2021. June 19, 1968. May 2, 2024. https://web.archive.org/web/20240502102728/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem820734/impact. live.
  78. Web site: Significant Earthquake: PERU: SAN MARTIN,MOYOBAMBA,YANTALO,RIOJA,LAMAS. National Geophysical Data Center. February 26, 2021. June 19, 1968. May 2, 2024. https://web.archive.org/web/20240502102807/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4445. live.
  79. Web site: M 6.1 - near the south coast of Honshu, Japan. United States Geological Survey. May 20, 2017. July 1, 1968. May 2, 2024. https://web.archive.org/web/20240502102803/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818523/executive. live.
  80. Web site: M 6.1 - near the south coast of Honshu, Japan. United States Geological Survey. February 26, 2021. July 1, 1968. May 2, 2024. https://web.archive.org/web/20240502102813/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818523/impact. live.
  81. Web site: M 6.4 - Guerrero, Mexico. United States Geological Survey. May 20, 2017. July 2, 1968. May 2, 2024. https://web.archive.org/web/20240502103326/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818550/executive. live.
  82. Web site: M 6.4 - Guerrero, Mexico. United States Geological Survey. February 26, 2021. July 2, 1968. May 2, 2024. https://web.archive.org/web/20240502103213/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818550/impact. live.
  83. Web site: M 6.0 - Papua, Indonesia. United States Geological Survey. May 21, 2017. July 2, 1968. May 2, 2024. https://web.archive.org/web/20240502103319/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818568/executive. live.
  84. Web site: M 6.0 - Papua, Indonesia. United States Geological Survey. February 26, 2021. July 2, 1968. May 2, 2024. https://web.archive.org/web/20240502103324/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818568/impact. live.
  85. Web site: M 6.3 - near the east coast of Honshu, Japan. United States Geological Survey. May 21, 2017. July 5, 1968. May 2, 2024. https://web.archive.org/web/20240502103220/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818662/executive. live.
  86. Web site: M 6.3 - near the east coast of Honshu, Japan. United States Geological Survey. February 26, 2021. July 5, 1968. May 2, 2024. https://web.archive.org/web/20240502103326/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818662/impact. live.
  87. Web site: M 7.3 - Kermadec Islands, New Zealand. United States Geological Survey. May 21, 2017. July 25, 1968. May 2, 2024. https://web.archive.org/web/20240502103848/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem819340/executive. live.
  88. Web site: M 7.3 - Kermadec Islands, New Zealand. United States Geological Survey. February 26, 2021. July 25, 1968. May 2, 2024. https://web.archive.org/web/20240502103725/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem819340/impact. live.
  89. Web site: Significant Earthquake: KERMADEC ISLANDS: S OF, RAOUL. National Geophysical Data Center. February 26, 2021. July 25, 1968. May 2, 2024. https://web.archive.org/web/20240502103843/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4447. live.
  90. Web site: M 6.2 - near the north coast of Papua, Indonesia. United States Geological Survey. May 21, 2017. July 29, 1968. May 2, 2024. https://web.archive.org/web/20240502103733/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem819494/executive. live.
  91. Web site: M 6.2 - near the north coast of Papua, Indonesia. United States Geological Survey. February 26, 2021. July 29, 1968. May 2, 2024. https://web.archive.org/web/20240502103727/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem819494/impact. live.
  92. Web site: M 6.5 - near the coast of northern Peru. United States Geological Survey. May 21, 2017. July 30, 1968. May 2, 2024. https://web.archive.org/web/20240502103728/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem819518/executive. live.
  93. Web site: M 6.5 - near the coast of northern Peru. United States Geological Survey. February 26, 2021. July 30, 1968. May 2, 2024. https://web.archive.org/web/20240502103729/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem819518/impact. live.
  94. Web site: M 7.6 - Luzon, Philippines. United States Geological Survey. May 21, 2017 . August 1, 1968.
  95. Web site: M 7.6 - Luzon, Philippines. United States Geological Survey. February 26, 2021 . August 1, 1968.
  96. Web site: Significant Earthquake: PHILIPPINES: LUZON: MANILA. National Geophysical Data Center. February 26, 2021. August 1, 1968. May 2, 2024. https://web.archive.org/web/20240502104429/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4448. live.
  97. Web site: Tsunami Event: E. LUZON ISLAND. National Geophysical Data Center. February 26, 2021. August 1, 1968. May 2, 2024. https://web.archive.org/web/20240502104339/https://www.ngdc.noaa.gov/hazel/view/hazards/tsunami/event-more-info/2003. live.
  98. Web site: M 7.3 - Oaxaca, Mexico. United States Geological Survey. May 21, 2017. August 2, 1968. May 2, 2024. https://web.archive.org/web/20240502104316/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817583/executive. live.
  99. Web site: M 7.3 - Oaxaca, Mexico. United States Geological Survey. February 26, 2021. August 2, 1968. May 2, 2024. https://web.archive.org/web/20240502104257/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817583/impact. live.
  100. Web site: Significant Earthquake: MEXICO: OAXACA, GUERRERO. National Geophysical Data Center. February 26, 2021. August 2, 1968. May 2, 2024. https://web.archive.org/web/20240502104342/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4451. live.
  101. Web site: M 6.7 - Ryukyu Islands, Japan. United States Geological Survey. May 21, 2017. August 3, 1968. May 2, 2024. https://web.archive.org/web/20240502104817/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817611/executive. live.
  102. Web site: M 6.7 - Ryukyu Islands, Japan. United States Geological Survey. February 26, 2021. August 3, 1968. May 2, 2024. https://web.archive.org/web/20240502104924/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817611/impact. live.
  103. Web site: M 6.4 - Luzon, Philippines. United States Geological Survey. May 21, 2017. August 3, 1968. May 2, 2024. https://web.archive.org/web/20240502104919/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817612/executive. live.
  104. Web site: M 6.4 - Luzon, Philippines. United States Geological Survey. February 26, 2021. August 3, 1968. May 2, 2024. https://web.archive.org/web/20240502104920/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817612/impact. live.
  105. Web site: M 6.1 - Mindanao, Philippines. United States Geological Survey. May 21, 2017. August 4, 1968. May 2, 2024. https://web.archive.org/web/20240502104923/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817656/executive. live.
  106. Web site: M 6.1 - Mindanao, Philippines. United States Geological Survey. February 26, 2021. August 4, 1968. May 2, 2024. https://web.archive.org/web/20240502104916/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817656/impact. live.
  107. Web site: M 6.8 - Shikoku, Japan. United States Geological Survey. May 21, 2017. August 5, 1968. May 2, 2024. https://web.archive.org/web/20240502104828/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817699/executive. live.
  108. Web site: M 6.8 - Shikoku, Japan. United States Geological Survey. February 26, 2021. August 5, 1968. May 2, 2024. https://web.archive.org/web/20240502104857/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817699/impact. live.
  109. Web site: M 7.6 - Molucca Sea. United States Geological Survey. May 22, 2017. August 10, 1968. May 2, 2024. https://web.archive.org/web/20240502104804/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817844/executive. live.
  110. Web site: M 7.6 - Molucca Sea. United States Geological Survey. February 26, 2021. August 10, 1968. May 2, 2024. https://web.archive.org/web/20240502104807/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817844/impact. live.
  111. Web site: Significant Earthquake: INDONESIA: MOLUCCA ISLANDS: MANADO, CELEBES. National Geophysical Data Center. February 26, 2021. August 10, 1968. May 2, 2024. https://web.archive.org/web/20240502104825/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4452. live.
  112. Web site: M 6.5 - Molucca Sea. United States Geological Survey. May 22, 2017. August 10, 1968. May 2, 2024. https://web.archive.org/web/20240502104829/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817856/executive. live.
  113. Web site: M 6.0 - offshore Michoacan, Mexico. United States Geological Survey. May 22, 2017. August 14, 1968. May 2, 2024. https://web.archive.org/web/20240502104932/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818003/executive. live.
  114. Web site: M 6.0 - offshore Michoacan, Mexico. United States Geological Survey. February 26, 2021. August 14, 1968. May 2, 2024. https://web.archive.org/web/20240502105001/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818003/impact. live.
  115. Web site: M 7.2 - Minahasa, Sulawesi, Indonesia. United States Geological Survey. May 22, 2017. August 14, 1968. May 18, 2020. https://web.archive.org/web/20200518155010/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818025/executive. live.
  116. Web site: M 7.2 - Minahasa, Sulawesi, Indonesia. United States Geological Survey. February 26, 2021. August 14, 1968. May 2, 2024. https://web.archive.org/web/20240502105320/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818025/impact. live.
  117. Web site: Tsunami Event: BANDA SEA. National Geophysical Data Center. February 26, 2021. August 14, 1968. May 2, 2024. https://web.archive.org/web/20240502105320/https://www.ngdc.noaa.gov/hazel/view/hazards/tsunami/event-more-info/2007. live.
  118. Web site: M 7.3 - Solomon Islands. United States Geological Survey. May 22, 2017. August 18, 1968. May 2, 2024. https://web.archive.org/web/20240502105459/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818136/executive. live.
  119. Web site: M 7.3 - Solomon Islands. United States Geological Survey. February 26, 2021. August 18, 1968. May 2, 2024. https://web.archive.org/web/20240502105325/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818136/impact. live.
  120. Web site: M 6.5 - Kermadec Islands, New Zealand. United States Geological Survey. May 27, 2017. August 21, 1968. May 2, 2024. https://web.archive.org/web/20240502105518/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818206/executive. live.
  121. Web site: M 6.3 - Tarija, Bolivia. United States Geological Survey. May 27, 2017. August 23, 1968. May 2, 2024. https://web.archive.org/web/20240502105337/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818277/executive. live.
  122. Web site: M 6.4 - Philippine Islands region. United States Geological Survey. May 27, 2017. August 28, 1968. May 2, 2024. https://web.archive.org/web/20240502105352/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818415/executive. live.
  123. Web site: M 6.4 - Philippine Islands region. United States Geological Survey. February 26, 2021 . August 28, 1968.
  124. Web site: M 7.1 - northeastern Iran. United States Geological Survey. May 27, 2017. August 31, 1968. May 2, 2024. https://web.archive.org/web/20240502110448/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818488/executive. live.
  125. Web site: M 7.1 - northeastern Iran. United States Geological Survey. February 26, 2021. August 31, 1968. May 2, 2024. https://web.archive.org/web/20240502110550/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem818488/impact. live.
  126. Web site: Significant Earthquake: IRAN: DASHT-E-BAYAZ. National Geophysical Data Center. February 26, 2021. August 31, 1968. May 2, 2024. https://web.archive.org/web/20240502110434/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4456. live.
  127. Web site: M 6.2 - northeastern Iran. United States Geological Survey. May 27, 2017. September 1, 1968. May 2, 2024. https://web.archive.org/web/20240502110414/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem816551/executive. live.
  128. Web site: M 6.2 - northeastern Iran. United States Geological Survey. February 26, 2021. September 1, 1968. May 2, 2024. https://web.archive.org/web/20240502110552/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem816551/impact. live.
  129. Web site: Significant Earthquake: IRAN: FERDOW. National Geophysical Data Center. February 26, 2021. September 1, 1968. May 2, 2024. https://web.archive.org/web/20240502110557/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4459. live.
  130. Web site: M 6.3 - central Turkey. United States Geological Survey. May 28, 2017. September 3, 1968. July 4, 2023. https://web.archive.org/web/20230704090901/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem816634/executive. live.
  131. Web site: M 6.3 - central Turkey. United States Geological Survey. February 26, 2021. September 3, 1968. May 2, 2024. https://web.archive.org/web/20240502110612/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem816634/impact. live.
  132. Web site: Significant Earthquake: TURKEY: BARTIN, AMASRA, CAKRAZ. National Geophysical Data Center. February 26, 2021. September 3, 1968. May 2, 2024. https://web.archive.org/web/20240502111012/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4460. live.
  133. Web site: M 6.3 - near the north coast of New Guinea, Papua New Guinea. United States Geological Survey. May 28, 2017. September 8, 1968. May 2, 2024. https://web.archive.org/web/20240502111043/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem816856/executive. live.
  134. Web site: M 6.3 - near the north coast of New Guinea, Papua New Guinea. United States Geological Survey. February 26, 2021. September 8, 1968. May 2, 2024. https://web.archive.org/web/20240502111125/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem816856/impact. live.
  135. Web site: M 6.1 - central Peru. United States Geological Survey. May 28, 2017. September 9, 1968. May 2, 2024. https://web.archive.org/web/20240502111056/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem816874/executive. live.
  136. Web site: M 6.1 - central Peru. United States Geological Survey. February 26, 2021. September 9, 1968. May 2, 2024. https://web.archive.org/web/20240502111046/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem816874/impact. live.
  137. Web site: M 6.2 - southern Iran. United States Geological Survey. May 28, 2017. September 14, 1968. May 2, 2024. https://web.archive.org/web/20240502110924/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817010/executive. live.
  138. Web site: M 6.2 - southern Iran. United States Geological Survey. February 26, 2021. September 14, 1968. May 2, 2024. https://web.archive.org/web/20240502111100/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817010/impact. live.
  139. Web site: M 6.8 - New Britain region, Papua New Guinea. United States Geological Survey. May 29, 2017. September 16, 1968. May 2, 2024. https://web.archive.org/web/20240502111641/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817073/executive. live.
  140. Web site: M 6.8 - New Britain region, Papua New Guinea. United States Geological Survey. February 26, 2021. September 16, 1968. May 2, 2024. https://web.archive.org/web/20240502111527/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817073/impact. live.
  141. Web site: M 6.1 - New Britain region, Papua New Guinea. United States Geological Survey. May 29, 2017. September 16, 1968. May 2, 2024. https://web.archive.org/web/20240502111644/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817081/executive. live.
  142. Web site: M 6.1 - New Britain region, Papua New Guinea. United States Geological Survey. February 26, 2021. September 16, 1968. May 2, 2024. https://web.archive.org/web/20240502111805/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817081/impact. live.
  143. Web site: M 6.5 - Sucre, Venezuela. United States Geological Survey. May 29, 2017. September 20, 1968. August 1, 2023. https://web.archive.org/web/20230801205526/https://earthquake.usgs.gov/earthquakes/eventpage/iscgemsup817201/executive. live.
  144. Web site: M 6.5 - Sucre, Venezuela. United States Geological Survey. February 26, 2021. September 20, 1968. May 2, 2024. https://web.archive.org/web/20240502112048/https://earthquake.usgs.gov/earthquakes/eventpage/iscgemsup817201/impact. live.
  145. Web site: Significant Earthquake: VENEZUELA: CARUPANO. National Geophysical Data Center. February 26, 2021. September 20, 1968. May 2, 2024. https://web.archive.org/web/20240502112032/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4463. live.
  146. Web site: M 6.7 - Hokkaido, Japan region. United States Geological Survey. May 29, 2017. September 21, 1968. May 2, 2024. https://web.archive.org/web/20240502112130/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817240/executive. live.
  147. Web site: M 6.7 - Hokkaido, Japan region. United States Geological Survey. February 26, 2021. September 21, 1968. May 2, 2024. https://web.archive.org/web/20240502112114/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817240/impact. live.
  148. Web site: M 6.2 - off the west coast of the South Island of New Zealand. United States Geological Survey. May 29, 2017. September 25, 1968. May 2, 2024. https://web.archive.org/web/20240502112032/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817350/executive. live.
  149. Web site: M 6.0 - Chiapas, Mexico. United States Geological Survey. May 29, 2017. September 25, 1968. May 2, 2024. https://web.archive.org/web/20240502112040/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817353/executive. live.
  150. Web site: M 6.0 - Chiapas, Mexico. United States Geological Survey. February 26, 2021. September 25, 1968. May 2, 2024. https://web.archive.org/web/20240502112116/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817353/impact. live.
  151. Web site: Significant Earthquake: MEXICO-GUATEMALA: S CHIAPAS. National Geophysical Data Center. February 26, 2021. September 25, 1968. May 2, 2024. https://web.archive.org/web/20240502112500/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4465. live.
  152. Web site: M 7.1 - Kermadec Islands, New Zealand. United States Geological Survey. May 29, 2017. September 26, 1968. May 2, 2024. https://web.archive.org/web/20240502112506/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817404/executive. live.
  153. Web site: M 6.4 - near the north coast of New Guinea, Papua New Guinea. United States Geological Survey. May 31, 2017. September 27, 1968. May 2, 2024. https://web.archive.org/web/20240502112636/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817437/executive. live.
  154. Web site: M 6.4 - near the north coast of New Guinea, Papua New Guinea. United States Geological Survey. February 26, 2021. September 27, 1968. May 2, 2024. https://web.archive.org/web/20240502112538/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817437/impact. live.
  155. Web site: M 6.1 - near the coast of central Peru. United States Geological Survey. May 31, 2017. September 28, 1968. May 2, 2024. https://web.archive.org/web/20240502112705/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817459/executive. live.
  156. Web site: M 6.1 - near the coast of central Peru. United States Geological Survey. February 26, 2021. September 28, 1968. May 2, 2024. https://web.archive.org/web/20240502112635/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem817459/impact. live.
  157. Web site: M 7.3 - Bonin Islands, Japan region. United States Geological Survey. May 31, 2017. October 7, 1968. May 2, 2024. https://web.archive.org/web/20240502112714/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem815709/executive. live.
  158. Web site: M 6.5 - Hokkaido, Japan region. United States Geological Survey. May 31, 2017 . October 7, 1968.
  159. Web site: M 6.5 - Hokkaido, Japan region. United States Geological Survey. February 27, 2021 . October 7, 1968.
  160. Web site: M 6.1 - New Britain region, Papua New Guinea. United States Geological Survey. May 31, 2017 . October 10, 1968.
  161. Web site: M 6.1 - New Britain region, Papua New Guinea. United States Geological Survey. February 27, 2021 . October 10, 1968.
  162. Web site: M 6.5 - Western Australia. United States Geological Survey. May 31, 2017 . October 14, 1968.
  163. Web site: M 6.5 - Western Australia. United States Geological Survey. February 27, 2021 . October 14, 1968.
  164. Web site: Significant Earthquake: AUSTRALIA: MECKERING, NORTHAM, CUNDERDIN, YORK. National Geophysical Data Center. February 27, 2021 . October 14, 1968.
  165. Web site: M 6.2 - Taiwan region. United States Geological Survey. May 31, 2017. October 20, 1968. May 2, 2024. https://web.archive.org/web/20240502113124/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem816127/executive. live.
  166. Web site: M 6.2 - Taiwan region. United States Geological Survey. February 27, 2021. October 20, 1968. May 2, 2024. https://web.archive.org/web/20240502113303/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem816127/impact. live.
  167. Web site: M 7.0 - near the north coast of New Guinea, Papua New Guinea. United States Geological Survey. June 3, 2017. October 23, 1968. May 2, 2024. https://web.archive.org/web/20240502113258/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem816232/executive. live.
  168. Web site: M 7.0 - near the north coast of New Guinea, Papua New Guinea. United States Geological Survey. February 27, 2021. October 23, 1968. May 2, 2024. https://web.archive.org/web/20240502113051/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem816232/impact. live.
  169. Web site: Significant Earthquake: PAPUA NEW GUINEA: N COAST, WEWAK, DAGUA. National Geophysical Data Center. February 27, 2021. October 23, 1968. May 2, 2024. https://web.archive.org/web/20240502113232/https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4469. live.
  170. Web site: M 6.3 - Philippine Islands region. United States Geological Survey. June 3, 2017. October 24, 1968. May 2, 2024. https://web.archive.org/web/20240502113049/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem816258/executive. live.
  171. Web site: M 6.7 - northern Alaska. United States Geological Survey. June 3, 2017. October 29, 1968. May 2, 2024. https://web.archive.org/web/20240502113305/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem816416/executive. live.
  172. Web site: M 6.7 - northern Alaska. United States Geological Survey. February 28, 2021. October 29, 1968. May 2, 2024. https://web.archive.org/web/20240502113454/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem816416/impact. live.
  173. Web site: M 6.5 - Vanuatu region. United States Geological Survey. June 3, 2017. November 4, 1968. May 2, 2024. https://web.archive.org/web/20240502113800/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem814785/executive. live.
  174. Web site: M 6.1 - Zulia, Venezuela. United States Geological Survey. June 3, 2017. November 17, 1968. May 2, 2024. https://web.archive.org/web/20240502113744/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem815159/executive. live.
  175. Web site: M 6.1 - Luzon, Philippines. United States Geological Survey. June 3, 2017. November 22, 1968. May 2, 2024. https://web.archive.org/web/20240502113604/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem815285/executive. live.
  176. Web site: M 6.1 - Luzon, Philippines. United States Geological Survey. February 28, 2021. November 22, 1968. May 2, 2024. https://web.archive.org/web/20240502113637/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem815285/impact. live.
  177. Web site: M 6.1 - Dodecanese Islands, Greece. United States Geological Survey. June 3, 2017. December 5, 1968. May 2, 2024. https://web.archive.org/web/20240502113751/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem813880/executive. live.
  178. Web site: M 6.1 - Dodecanese Islands, Greece. United States Geological Survey. February 28, 2021. December 5, 1968. May 2, 2024. https://web.archive.org/web/20240502113704/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem813880/impact. live.
  179. Web site: M 6.0 - Iceland region. United States Geological Survey. June 3, 2017. December 5, 1968. February 7, 2024. https://web.archive.org/web/20240207004553/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem813884/executive. live.
  180. Web site: M 6.0 - Iceland region. United States Geological Survey. February 28, 2021. December 5, 1968. May 2, 2024. https://web.archive.org/web/20240502114310/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem813884/impact. live.
  181. Web site: M 6.6 - Bismarck Sea. United States Geological Survey. June 3, 2017. December 7, 1968. May 2, 2024. https://web.archive.org/web/20240502114344/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem813940/executive. live.
  182. Web site: M 6.3 - Southern Alaska. United States Geological Survey. June 3, 2017. December 17, 1968. May 2, 2024. https://web.archive.org/web/20240502114047/https://earthquake.usgs.gov/earthquakes/eventpage/iscgemsup814226/executive. live.
  183. Web site: M 6.3 - Southern Alaska. United States Geological Survey. February 28, 2021. December 17, 1968. May 2, 2024. https://web.archive.org/web/20240502114142/https://earthquake.usgs.gov/earthquakes/eventpage/iscgemsup814226/impact. live.
  184. Web site: M 6.0 - near the east coast of the Kamchatka Peninsula, Russia. United States Geological Survey. June 3, 2017. December 19, 1968. May 2, 2024. https://web.archive.org/web/20240502114127/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem814306/executive. live.
  185. Web site: M 6.0 - near the east coast of the Kamchatka Peninsula, Russia. United States Geological Survey. February 28, 2021. December 19, 1968. May 2, 2024. https://web.archive.org/web/20240502114124/https://earthquake.usgs.gov/earthquakes/eventpage/iscgem814306/impact. live.

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