1994 Mindoro earthquake explained

1994 Mindoro earthquake
Timestamp:1994-11-14 19:15:30
Anss-Url:usp0006nn2
Isc-Event:141635
Local-Date:November 15, 1994
Local-Time:03:15 PST
Map:Shake Map Mindoro 1994.jpg
Magnitude:7.1
Depth:31.5km (19.6miles)
Location:13.525°N 121.067°W
Type:Strike-slip
Countries Affected:Philippines
Tsunami:Yes
Casualties:78 killed, 225–340 injured[1] [2]

The 1994 Mindoro earthquake occurred at near Mindoro, Philippines. It had a moment magnitude of 7.1 and a maximum Rossi–Forel of VII (Very strong tremor). It is associated with a 35km (22miles) ground rupture, called the Aglubang River fault.[3] Seventy eight people were reported dead,[4] and 7,566 houses were damaged. The earthquake generated a tsunami and landslides on the Verde Island.

Earthquake

The epicenter of this earthquake was located in the Verde Island Passage, a strait separating Luzon and Mindoro. The focal mechanism showed predominantly right-lateral strike-slip faulting.[5] The released seismic moment was about 5.12×1019 Nm.[6]

Surface faulting

The Aglubang River fault, which shows a right-lateral strike-slip sense of movement, extends from Malaylay Island in the north of Oriental Mindoro to Alcate, Victoria in the south. Measurements along the rupture reveal a maximum horizontal displacement of 4m (13feet) and a maximum vertical displacement of 1.9m (06.2feet).[3] [7]

Tsunami

The earthquake generated a tsunami, which affected Mindoro, the Verde Island, the Baco Islands,[8] and Luzon. Some concrete structures also suffered moderate damage in the tsunami. In Baco Islands, the vertical run-up reached 8.5m (27.9feet). The tsunami was also recorded in Lobo.[9] The tsunami was larger than expected considering the strike-slip movement of the earthquake.

See also

Further reading

Notes and References

  1. Web site: Today in Earthquake History. USGS. February 18, 2022. https://archive.today/20220218032229/https://earthquake.usgs.gov/learn/today/index.php?month=11&day=14. February 18, 2022. live.
  2. Web site: 15 November 1994, Mw 7.1, Mindoro, Philippines. March 19, 2022 .
  3. Rimando, R.E., Punongbayan, R.S., Geronimo-Catane, S.G., Mirabueno, H.S., Rasdas, A.S., 1995. Ground rupture of the November 15, 1994, Oriental Mindoro (Philippines) earthquake. XXI General Assembly of IUGG, Abstracts, p. A422.
  4. Web site: Significant Earthquakes of the World . August 28, 2017 . https://web.archive.org/web/20110714105610/http://earthquake.usgs.gov/earthquakes/eqarchives/significant/sig_1994.php . July 14, 2011 . dead .
  5. Web site: Simplina-Manahan . J. J. . Source Characterization of the 15 November 1994, Ms 7.1 Mindoro, Philippines Earthquake . The SAO/NASA Astrophysics Data System . 11 March 2024 . S11A–1003 . 1 December 2004.
  6. Web site: 1994.11.14 Mindoro, Philippine . December 6, 2011 . https://web.archive.org/web/20120518052053/http://www.eri.u-tokyo.ac.jp/sanchu/World/Ev/19941114/ . May 18, 2012 . dead .
  7. PHIVOLCS Quick Response Teams, December 1994. PHIVOLCS Special Report No. 2. THE November 15, 1994, Mindoro Earthquake.
  8. Web site: Tsunamis – past and present.
  9. Web site: Field Survey report -Philippines Tsunami Disaster- . December 6, 2011 . https://web.archive.org/web/20120426023044/http://www.drs.dpri.kyoto-u.ac.jp/eqtap/report/philippine/field_survey_report/field_survey_report.htm . April 26, 2012 . dead .

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