List of earthquakes in 1977 explained

Year:1977
Location Map:Earth
Largest: Indonesia, south of Sumbawa (Magnitude 8.3) August 19
Deadliest: Romania, Vrancea County (Magnitude 7.5) March 4 1,641 deaths
Fatalities:3,107
9.0+:0
8.0–8.9:1
7.0–7.9:10
6.0–6.9:75
5.0–5.9:1,693
4.0–4.9:2,395

This is a list of earthquakes in 1977. Only earthquakes of magnitude 6 or above are included, unless they result in damage and/or casualties, or are notable for some other reason. Events in remote areas will not be listed but included in statistics and maps. Countries are entered on the lists in order of their status in this particular year. 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. Not a particularly busy year as far as the number of magnitude 7.0+ events with 11 being recorded. The largest event struck Indonesia in August and measured magnitude 8.3. The Solomon Islands were affected by a series of magnitude 7.5 events in April. Several events caused significant numbers of fatalities especially in Iran which had 3 earthquakes throughout the year with a combined death toll of around 1,120 people. The deadliest earthquake occurred in Romania in March and was the worst in the country's history. 1,641 people were killed in this event.

By death toll

RankDeath tollMagnitudeLocationMMIDepth (km)Date
1
2
3
4
5
6 Argentina, San Juan Province, Argentina
7, Guadalcanal
8
9, Guadalcanal
Listed are earthquakes with at least 10 dead.

By magnitude

RankMagnitude Death tollLocationMMIDepth (km)Date
1
2
= 3 Romania, Vrancea County
= 3, Guadalcanal
= 3, Guadalcanal
= 3, Guadalcanal
4 Argentina, San Juan Province, Argentina
= 5
= 5 Tonga, south of
6, east of South Georgia and the South Sandwich Islands
7 Philippines, Luzon
Listed are earthquakes with at least 7.0 magnitude.

By month

January

Month:January
8.0–8.9:0
7.0–7.9:0
6.0–6.9:7
5.0–5.9:131
4.0–4.9:184
Largest:6.6 Mw Papua New Guinea
Fatalities:0
Date! rowspan="2" style="width: 280px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[1] [2] 6.3 27.0
[3] [4] 6.3 19.0
[5] [6] 6.6 33.0
[7] [8] 6.3 33.0
[9] [10] 6.0 50.0
[11] [12] [13] 5.2 33.0 Some damage was caused.
[14] [15] [16] 6.1 20.0 Some damage was caused.

February

Month:February
8.0–8.9:0
7.0–7.9:0
6.0–6.9:7
5.0–5.9:96
4.0–4.9:152
Largest:6.7 Mw United States
Fatalities:0
Date! rowspan="2" style="width: 280px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[17] 6.0 549.0
[18] 6.7 33.0

March

Month:March
8.0–8.9:0
7.0–7.9:2
6.0–6.9:7
5.0–5.9:132
4.0–4.9:229
Largest:7.5 Mw Romania
Deadliest:7.5 Mw Romania
1,641 deaths
Fatalities:1,839
Date! rowspan="2" style="width: 280px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[19] [20] 6.1 52.0
[21] [22] [23] 7.5 94.0 Deadliest event of 1977. The 1977 Vrancea earthquake caused major destruction despite being fairly deep. 1,641 people were killed and 10,500 were injured. This was the deadliest earthquake in Romanian history. Bucharest suffered major property damage with costs reaching $2 billion (1977 rate). 1,641 10,500
[24] [25] [26] 6.0 22.0 Some damage was caused.
[27] [28] [29] 7.0 37.0 1 person was killed and another 9 were injured. 14 homes were destroyed and 22 more were damaged. Costs were $100,000 (1977 rate). 1 9
[30] [31] [32] 6.9 29.0 During the 1977 Khurgu earthquake, 167 people were killed and another 556 were injured. Major damage was reported. 167 556
[33] [34] 6.3 33.0
[35] 6.0 2.0 Aftershock of previous event.
[36] [37] [38] 5.2 21.0 30 people were killed and major damage was caused. 30
[39] [40] 6.0 38.0

April

Month:April
8.0–8.9:0
7.0–7.9:4
6.0–6.9:7
5.0–5.9:156
4.0–4.9:234
Deadliest:5.9 Mw
366 deaths
Fatalities:418
Date! rowspan="2" style="width: 280px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[41] [42] 6.2 29.0 Aftershock of March 21 event.
[43] [44] [45] 7.6 33.0 Some damage was reported.
[46] [47] [48] 5.9 41.0 The 1977 Naghan earthquake killed at least 366 people and left a further 200 injured. Some damage was caused. 366 200
[49] [50] [51] 6.7 33.0 Beginning of a series of large and destructive earthquakes in a period of several hours. 12 people died and a further 22 were missing in the first event. Major damage was caused. A mild tsunami was observed. 34
[52] [53] [54] 7.5 19.0 IX[55] Some damage was caused.
[56] [57] [58] 7.5 33.0 Suspected injuries and damage were reported. 1+
[59] [60] 6.1 33.0
[61] [62] [63] 7.5 33.0 Final of the mainshocks in the series. A further 18 people were killed and 1 person was injured. Major damage was caused. 18 1
[64] [65] 6.0 33.0 Aftershock.
[66] [67] 6.0 51.0 Aftershock.

May

Month:May
8.0–8.9:0
7.0–7.9:0
6.0–6.9:1
5.0–5.9:128
4.0–4.9:211
Largest:6.0 Mw United States
Deadliest:5.4 Mw
3 deaths
Fatalities:3
Date! rowspan="2" style="width: 280px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[68] [69] [70] 5.4 37.0 3 people were killed and 9 were injured. Heavy damage was reported. 3 9
[71] [72] 6.0 33.0

June

Month:June
8.0–8.9:0
7.0–7.9:0
6.0–6.9:4
5.0–5.9:115
4.0–4.9:224
Largest:6.8 Mw Tonga
Deadliest:6.8 Mw Tonga
1 death
Fatalities:1
Date! rowspan="2" style="width: 280px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[73] [74] [75] 6.8 65.0 1 person was killed and 5 were injured in the 1977 Tonga earthquake. $1.2 million (1977 rate) of property damage was caused. 1 5

July

Month:July
8.0–8.9:0
7.0–7.9:1
6.0–6.9:5
5.0–5.9:116
4.0–4.9:184
Largest:7.2 Mw United Kingdom, Solomon Islands
Fatalities:0
Date! rowspan="2" style="width: 280px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[76] [77] 4.6 6.0 Some damage was caused.
[78] [79] 6.9 33.0
[80] [81] 7.2 33.0

August

Month:August
8.0–8.9:1
7.0–7.9:1
6.0–6.9:11
5.0–5.9:180
4.0–4.9:212
Largest:8.3 Mw Indonesia
Deadliest:8.3 Mw Indonesia
189 deaths
Fatalities:192
Date! rowspan="2" style="width: 280px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[82] 6.1 33.0 Foreshock of 1977 Sumba earthquake.
[83] [84] [85] [86] 8.3 25.0 Largest event of 1977. The 1977 Sumba earthquake caused some damage. A large tsunami led to 189 deaths and 75 injuries. Damage costs of $1.2 million (1977 rate). Many aftershocks followed. 189 75
[87] 7.1 33.0
[88] [89] 6.8 25.0
[90] [91] 6.2 12.0
[92] [93] [94] 6.4 33.0 3 people were killed and some damage was caused. 3

September

Month:September
8.0–8.9:0
7.0–7.9:0
6.0–6.9:9
5.0–5.9:141
4.0–4.9:192
Largest:6.6 Mw United States
Fatalities:0
Date! rowspan="2" style="width: 280px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[95] [96] 6.5 33.0
[97] [98] 6.4 34.0 First of a series of large events in the area.
[99] [100] 6.4 31.0
[101] [102] 6.6 8.0
[103] 6.0 33.0
[104] 6.0 33.0

October

Month:October
8.0–8.9:0
7.0–7.9:1
6.0–6.9:4
5.0–5.9:184
4.0–4.9:208
Largest:7.2 Mw Tonga
Fatalities:0
Date! rowspan="2" style="width: 280px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[105] [106] Tonga, south of 7.2 33.0
[107] 6.1 614.0

November

Month:November
8.0–8.9:0
7.0–7.9:1
6.0–6.9:7
5.0–5.9:160
4.0–4.9:186
Largest:7.4 Mw Argentina
Deadliest:7.4 Mw Argentina
70 deaths
Fatalities:70
Date! rowspan="2" style="width: 280px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[108] [109] [110] 5.2 6.0 Some damage was caused.
[111] [112] 6.7 33.0
[113] [114] [115] 4.9 33.0 Some damage was caused.
[116] [117] 6.5 33.0
[118] [119] [120] 7.4 13.0 70 people were killed and 300 were injured in the 1977 San Juan earthquake. Extensive property damage was caused with costs of $80 million (1977 rate). 70 300
[121] [122] 6.0 33.0 Aftershock.
[123] [124] 6.0 33.0 Aftershock.
[125] [126] 6.3 23.0 Aftershock.

December

Month:December
8.0–8.9:0
7.0–7.9:0
6.0–6.9:6
5.0–5.9:154
4.0–4.9:179
Largest:6.8 Mw Japan
Deadliest:5.8 Mw
584 deaths
Fatalities:584
Date! rowspan="2" style="width: 280px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[127] [128] [129] 5.8 31.0 During the 1977 Bob–Tangol earthquake, 584 people were killed and 1,000 were injured. Major damage was caused. 584 1,000
[130] [131] 6.6 33.0

Notes and References

  1. Web site: M 6.3 - Xinjiang-Qinghai border region, China. United States Geological Survey. June 6, 2021. January 1, 1977.
  2. Web site: M 6.3 - Xinjiang-Qinghai border region, China. United States Geological Survey. June 6, 2021. January 1, 1977.
  3. Web site: M 6.3 - south of Sumbawa, Indonesia. United States Geological Survey. June 6, 2021. January 2, 1977.
  4. Web site: M 6.3 - south of Sumbawa, Indonesia. United States Geological Survey. June 6, 2021. January 2, 1977.
  5. Web site: M 6.6 - near the north coast of New Guinea, Papua New Guinea. United States Geological Survey. June 6, 2021. January 6, 1977.
  6. Web site: M 6.6 - near the north coast of New Guinea, Papua New Guinea. United States Geological Survey. June 6, 2021. January 6, 1977.
  7. Web site: M 6.3 - Antofagasta, Chile. United States Geological Survey. June 6, 2021. January 17, 1977.
  8. Web site: M 6.3 - Antofagasta, Chile. United States Geological Survey. June 6, 2021. January 17, 1977.
  9. Web site: M 6.0 - Cook Strait, New Zealand. United States Geological Survey. June 6, 2021. January 18, 1977.
  10. Web site: M 6.0 - Cook Strait, New Zealand. United States Geological Survey. June 6, 2021. January 18, 1977.
  11. Web site: M 5.2 - Bali region, Indonesia. United States Geological Survey. June 6, 2021. January 26, 1977.
  12. Web site: M 5.2 - Bali region, Indonesia. United States Geological Survey. June 6, 2021. January 26, 1977.
  13. Web site: Significant Earthquake: INDONESIA: BALI: KAYUBIHI,BANJAR ANTUGAN JEHEM. National Geophysical Data Center. June 6, 2021. January 26, 1977.
  14. Web site: M 6.1 - Kyrgyzstan. United States Geological Survey. June 6, 2021. January 31, 1977.
  15. Web site: M 6.1 - Kyrgyzstan. United States Geological Survey. June 6, 2021. January 31, 1977.
  16. Web site: Significant Earthquake: TAJIKISTAN. National Geophysical Data Center. June 6, 2021. January 31, 1977.
  17. Web site: M 6.0 - Salta, Argentina. United States Geological Survey. June 6, 2021. February 4, 1977.
  18. Web site: M 6.7 - Near Islands, Aleutian Islands, Alaska. United States Geological Survey. June 6, 2021. February 19, 1977.
  19. Web site: M 6.1 - Moro Gulf, Mindanao, Philippines. United States Geological Survey. June 6, 2021. March 2, 1977.
  20. Web site: M 6.1 - Moro Gulf, Mindanao, Philippines. United States Geological Survey. June 6, 2021. March 2, 1977.
  21. Web site: M 7.5 - Romania. United States Geological Survey. June 6, 2021. March 4, 1977.
  22. Web site: M 7.5 - Romania. United States Geological Survey. June 6, 2021. March 4, 1977.
  23. Web site: Significant Earthquake: ROMANIA: BUCHAREST. National Geophysical Data Center. June 6, 2021. March 4, 1977.
  24. Web site: M 6.0 - northern Sumatra, Indonesia. United States Geological Survey. June 6, 2021. March 8, 1977.
  25. Web site: M 6.0 - northern Sumatra, Indonesia. United States Geological Survey. June 6, 2021. March 8, 1977.
  26. Web site: Significant Earthquake: INDONESIA: SUMATERA,SINURAT,TALU. National Geophysical Data Center. June 6, 2021. March 8, 1977.
  27. Web site: M 7.0 - Luzon, Philippines. United States Geological Survey. June 6, 2021. March 18, 1977.
  28. Web site: M 7.0 - Luzon, Philippines. United States Geological Survey. June 6, 2021. March 18, 1977.
  29. Web site: Significant Earthquake: PHILIPPINES: LUZON: MANILA. National Geophysical Data Center. June 6, 2021. March 18, 1977.
  30. Web site: M 6.9 - southern Iran. United States Geological Survey. June 6, 2021. March 21, 1977.
  31. Web site: M 6.9 - southern Iran. United States Geological Survey. June 6, 2021. March 21, 1977.
  32. Web site: Significant Earthquake: IRAN: BANDAR ABBAS. National Geophysical Data Center. June 6, 2021. March 21, 1977.
  33. Web site: M 6.3 - Fiji region. United States Geological Survey. June 6, 2021. March 23, 1977.
  34. Web site: M 6.3 - Fiji region. United States Geological Survey. June 6, 2021. March 23, 1977.
  35. Web site: M 6.3 - Fiji region. United States Geological Survey. June 6, 2021. March 23, 1977.
  36. Web site: M 5.2 - eastern Turkey. United States Geological Survey. June 7, 2021. March 25, 1977.
  37. Web site: M 5.2 - eastern Turkey. United States Geological Survey. June 7, 2021. March 25, 1977.
  38. Web site: Significant Earthquake: TURKEY. National Geophysical Data Center. June 7, 2021. March 25, 1977.
  39. Web site: M 6.0 - Fox Islands, Aleutian Islands, Alaska. United States Geological Survey. June 7, 2021. March 26, 1977.
  40. Web site: M 6.0 - Fox Islands, Aleutian Islands, Alaska. United States Geological Survey. June 7, 2021. March 26, 1977.
  41. Web site: M 6.2 - southern Iran. United States Geological Survey. June 8, 2021. April 1, 1977.
  42. Web site: M 6.2 - southern Iran. United States Geological Survey. June 8, 2021. April 1, 1977.
  43. Web site: M 7.6 - Samoa Islands region. United States Geological Survey. June 8, 2021. April 2, 1977.
  44. Web site: M 7.6 - Samoa Islands region. United States Geological Survey. June 8, 2021. April 2, 1977.
  45. Web site: Significant Earthquake: SAMOA ISLANDS: APIA. National Geophysical Data Center. June 8, 2021. April 2, 1977.
  46. Web site: M 5.9 - western Iran. United States Geological Survey. June 8, 2021. April 6, 1977.
  47. Web site: M 5.9 - western Iran. United States Geological Survey. June 8, 2021. April 6, 1977.
  48. Web site: Significant Earthquake: IRAN: NAGHAN,ARDAL,JAGHDAN,DASTGERD,KORDAN,SARMUR. National Geophysical Data Center. June 8, 2021. April 6, 1977.
  49. Web site: M 6.7 - Solomon Islands. United States Geological Survey. June 8, 2021. April 20, 1977.
  50. Web site: M 6.7 - Solomon Islands. United States Geological Survey. June 8, 2021. April 20, 1977.
  51. Web site: Significant Earthquake: SOLOMON ISLANDS. National Geophysical Data Center. June 8, 2021. April 20, 1977.
  52. Web site: M 7.5 - Solomon Islands. United States Geological Survey. June 8, 2021. April 20, 1977.
  53. Web site: M 7.5 - Solomon Islands. United States Geological Survey. June 8, 2021. April 20, 1977.
  54. Web site: Significant Earthquake: SOLOMON ISLANDS. National Geophysical Data Center. June 8, 2021. April 20, 1977.
  55. Web site: PAGER. 27 March 2023. 3 April 2023. USGS.
  56. Web site: M 7.5 - Solomon Islands. United States Geological Survey. June 8, 2021. April 20, 1977.
  57. Web site: M 7.5 - Solomon Islands. United States Geological Survey. June 8, 2021. April 20, 1977.
  58. Web site: Significant Earthquake: SOLOMON ISLANDS. National Geophysical Data Center. June 8, 2021. April 20, 1977.
  59. Web site: M 6.1 - Solomon Islands. United States Geological Survey. June 8, 2021. April 21, 1977.
  60. Web site: M 6.1 - Solomon Islands. United States Geological Survey. June 8, 2021. April 21, 1977.
  61. Web site: M 7.5 - Solomon Islands. United States Geological Survey. June 8, 2021. April 21, 1977.
  62. Web site: M 7.5 - Solomon Islands. United States Geological Survey. June 8, 2021. April 21, 1977.
  63. Web site: Significant Earthquake: SOLOMON ISLANDS. National Geophysical Data Center. June 8, 2021. April 21, 1977.
  64. Web site: M 6.0 - Solomon Islands. United States Geological Survey. June 8, 2021. April 21, 1977.
  65. Web site: M 6.0 - Solomon Islands. United States Geological Survey. June 8, 2021. April 21, 1977.
  66. Web site: M 6.0 - Solomon Islands. United States Geological Survey. June 8, 2021. April 22, 1977.
  67. Web site: M 6.0 - Solomon Islands. United States Geological Survey. June 8, 2021. April 22, 1977.
  68. Web site: M 5.4 - Turkey-Iran border region. United States Geological Survey. June 9, 2021. May 26, 1977.
  69. Web site: M 5.4 - Turkey-Iran border region. United States Geological Survey. June 9, 2021. May 26, 1977.
  70. Web site: Significant Earthquake: IRAN: AZARBAIJAN. National Geophysical Data Center. June 9, 2021. May 26, 1977.
  71. Web site: M 6.0 - Fox Islands, Aleutian Islands, Alaska. United States Geological Survey. June 9, 2021. May 30, 1977.
  72. Web site: M 6.0 - Fox Islands, Aleutian Islands, Alaska. United States Geological Survey. June 9, 2021. May 30, 1977.
  73. Web site: M 6.8 - Tonga region. United States Geological Survey. June 9, 2021. June 22, 1977.
  74. Web site: M 6.8 - Tonga region. United States Geological Survey. June 9, 2021. June 22, 1977.
  75. Web site: Significant Earthquake: TONGA TRENCH. National Geophysical Data Center. June 9, 2021. June 22, 1977.
  76. Web site: M 4.6 - Slovenia. United States Geological Survey. June 10, 2021. July 16, 1977.
  77. Web site: Significant Earthquake: BALKANS NW: SLOVENIA: TRSTENIK,BELA,TENETISE. National Geophysical Data Center. June 10, 2021. July 16, 1977.
  78. Web site: M 6.9 - Luzon, Philippines. United States Geological Survey. June 10, 2021. July 21, 1977.
  79. Web site: M 6.9 - Luzon, Philippines. United States Geological Survey. June 10, 2021. July 21, 1977.
  80. Web site: M 7.2 - Solomon Islands. United States Geological Survey. June 10, 2021. July 29, 1977.
  81. Web site: M 7.2 - Solomon Islands. United States Geological Survey. June 10, 2021. July 29, 1977.
  82. Web site: M 6.1 - south of Sumbawa, Indonesia. United States Geological Survey. June 10, 2021. August 19, 1977.
  83. Web site: M 8.3 - south of Sumbawa, Indonesia. United States Geological Survey. June 10, 2021. August 19, 1977.
  84. Web site: M 8.3 - south of Sumbawa, Indonesia. United States Geological Survey. June 10, 2021. August 19, 1977.
  85. Web site: Significant Earthquake: INDONESIA: SUNDA ISLANDS. National Geophysical Data Center. June 10, 2021. August 19, 1977.
  86. Web site: Tsunami Event: SUNDA ISLANDS. National Geophysical Data Center. June 10, 2021. August 19, 1977.
  87. Web site: M 7.1 - east of the South Sandwich Islands. United States Geological Survey. June 10, 2021. August 26, 1977.
  88. Web site: M 6.8 - East Timor region. United States Geological Survey. June 10, 2021. August 27, 1977.
  89. Web site: M 6.8 - East Timor region. United States Geological Survey. June 10, 2021. August 27, 1977.
  90. Web site: M 6.2 - Philippine Islands region. United States Geological Survey. June 10, 2021. August 29, 1977.
  91. Web site: M 6.2 - Philippine Islands region. United States Geological Survey. June 10, 2021. August 29, 1977.
  92. Web site: M 6.4 - northern Colombia. United States Geological Survey. June 10, 2021. August 31, 1977.
  93. Web site: M 6.4 - northern Colombia. United States Geological Survey. June 10, 2021. August 31, 1977.
  94. Web site: Significant Earthquake: COLOMBIA: APARTADO, MEDELLIN. National Geophysical Data Center. June 10, 2021. August 31, 1977.
  95. Web site: M 6.5 - Vanuatu. United States Geological Survey. June 12, 2021. September 4, 1977.
  96. Web site: M 6.5 - Vanuatu. United States Geological Survey. June 12, 2021. September 4, 1977.
  97. Web site: M 6.4 - Rat Islands, Aleutian Islands, Alaska. United States Geological Survey. June 12, 2021. September 4, 1977.
  98. Web site: M 6.4 - Rat Islands, Aleutian Islands, Alaska. United States Geological Survey. June 12, 2021. September 4, 1977.
  99. Web site: M 6.4 - Rat Islands, Aleutian Islands, Alaska. United States Geological Survey. June 12, 2021. September 4, 1977.
  100. Web site: M 6.4 - Rat Islands, Aleutian Islands, Alaska. United States Geological Survey. June 12, 2021. September 4, 1977.
  101. Web site: M 6.6 - Rat Islands, Aleutian Islands, Alaska. United States Geological Survey. June 12, 2021. September 4, 1977.
  102. Web site: M 6.6 - Rat Islands, Aleutian Islands, Alaska. United States Geological Survey. June 12, 2021. September 4, 1977.
  103. Web site: M 6.0 - Crete, Greece. United States Geological Survey. June 12, 2021. September 12, 1977.
  104. Web site: M 6.0 - Tonga. United States Geological Survey. June 12, 2021. September 13, 1977.
  105. Web site: M 7.2 - south of Tonga. United States Geological Survey. June 13, 2021. October 10, 1977.
  106. Web site: M 7.2 - south of Tonga. United States Geological Survey. June 13, 2021. October 10, 1977.
  107. Web site: M 6.1 - Santiago Del Estero, Argentina. United States Geological Survey. June 13, 2021. October 22, 1977.
  108. Web site: M 5.2 - Bulgaria. United States Geological Survey. June 13, 2021. November 3, 1977.
  109. Web site: M 5.2 - Bulgaria. United States Geological Survey. June 13, 2021. November 3, 1977.
  110. Web site: Significant Earthquake: ROMANIA: VELINGRAD. National Geophysical Data Center. June 13, 2021. November 3, 1977.
  111. Web site: M 6.7 - Andreanof Islands, Aleutian Islands, Alaska. United States Geological Survey. June 13, 2021. November 4, 1977.
  112. Web site: M 6.7 - Andreanof Islands, Aleutian Islands, Alaska. United States Geological Survey. June 13, 2021. November 4, 1977.
  113. Web site: M 4.9 - northern Iran. United States Geological Survey. June 13, 2021. November 9, 1977.
  114. Web site: M 4.9 - northern Iran. United States Geological Survey. June 13, 2021. November 9, 1977.
  115. Web site: Significant Earthquake: IRAN: GORGAN. National Geophysical Data Center. June 13, 2021. November 9, 1977.
  116. Web site: M 6.5 - western Xizang. United States Geological Survey. June 13, 2021. November 18, 1977.
  117. Web site: M 6.5 - western Xizang. United States Geological Survey. June 13, 2021. November 18, 1977.
  118. Web site: M 7.4 - San Juan, Argentina. United States Geological Survey. June 13, 2021. November 23, 1977.
  119. Web site: M 7.4 - San Juan, Argentina. United States Geological Survey. June 13, 2021. November 23, 1977.
  120. Web site: Significant Earthquake: ARGENTINA: SAN JUAN PROVINCE: MENDOZA. National Geophysical Data Center. June 13, 2021. November 23, 1977.
  121. Web site: M 6.0 - La Rioja, Argentina. United States Geological Survey. June 14, 2021. November 23, 1977.
  122. Web site: M 6.0 - La Rioja, Argentina. United States Geological Survey. June 14, 2021. November 23, 1977.
  123. Web site: M 6.0 - San Juan, Argentina. United States Geological Survey. June 14, 2021. November 24, 1977.
  124. Web site: M 6.0 - San Juan, Argentina. United States Geological Survey. June 14, 2021. November 24, 1977.
  125. Web site: M 6.3 - San Juan, Argentina. United States Geological Survey. June 14, 2021. November 24, 1977.
  126. Web site: M 6.3 - San Juan, Argentina. United States Geological Survey. June 14, 2021. November 24, 1977.
  127. Web site: M 5.8 - central Iran. United States Geological Survey. June 14, 2021. December 19, 1977.
  128. Web site: M 5.8 - central Iran. United States Geological Survey. June 14, 2021. December 19, 1977.
  129. Web site: Significant Earthquake: IRAN: BAB-TANGOL. National Geophysical Data Center. June 14, 2021. December 19, 1977.
  130. Web site: M 6.6 - Red Sea. United States Geological Survey. June 14, 2021. December 28, 1977.
  131. Web site: M 6.6 - Red Sea. United States Geological Survey. June 14, 2021. December 28, 1977.

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