1994 Mindoro earthquake

The 1994 Mindoro earthquake occurred at 03:15:30 PST on November 15 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 35-kilometer-long (22 mi) ground rupture, called the Aglubang River fault.[5] Seventy eight people were reported dead,[6] and 7,566 houses were damaged. The earthquake generated a tsunami and landslides on the Verde Island.

1994 Mindoro earthquake
UTC time1994-11-14 19:15:30
ISC event141635
USGS-ANSSComCat
Local dateNovember 15, 1994
Local time03:15 PST
Magnitude7.1 Mw[1]
Depth31.5 km (19.6 mi)[1]
Epicenter13.525°N 121.067°E / 13.525; 121.067[1]
TypeStrike-slip[2]
Areas affectedPhilippines
Max. intensityVII (Very strong tremor)[1]
TsunamiYes
Casualties78 killed, 225–340 injured[3][4]

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.[7] The released seismic moment was about 5.12×1019 Nm.[8]

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 4 meters (13 ft) and a maximum vertical displacement of 1.9 meters (6 ft 3 in).[5][9]

Tsunami

The earthquake generated a tsunami, which affected Mindoro, the Verde Island, the Baco Islands,[10] and Luzon. Some concrete structures also suffered moderate damage in the tsunami. In Baco Islands, the vertical run-up reached 8.5 meters (28 ft). The tsunami was also recorded in Lobo.[11] The tsunami was larger than expected considering the strike-slip movement of the earthquake.[2]

See also

References
  1. "M 7.1 - Mindoro, Philippines". United States Geological Survey. November 14, 1994. Retrieved August 31, 2017.
  2. Tanioka, Y.; Satake, K. (1996), "Tsunami generation by horizontal displacement of ocean bottom" (PDF), Geophysical Research Letters, 23 (8): 863, 864, Bibcode:1996GeoRL..23..861T, doi:10.1029/96GL00736, hdl:2027.42/95068
  3. "Today in Earthquake History". USGS. Archived from the original on February 18, 2022. Retrieved February 18, 2022.
  4. "15 November 1994, Mw 7.1, Mindoro, Philippines". Retrieved March 19, 2022.
  5. 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.
  6. "Significant Earthquakes of the World". Archived from the original on July 14, 2011. Retrieved August 28, 2017.
  7. http://wwwsoc.nii.ac.jp/jepsjmo/cd-rom/2005cd-rom/pdf/s052/s052p-004_e.pdf%5B%5D
  8. "1994.11.14 Mindoro, Philippine". Archived from the original on May 18, 2012. Retrieved December 6, 2011.
  9. PHIVOLCS Quick Response Teams, December 1994. PHIVOLCS Special Report No. 2. THE November 15, 1994, Mindoro Earthquake.
  10. "Tsunamis – past and present".
  11. "Field Survey report -Philippines Tsunami Disaster-". Archived from the original on April 26, 2012. Retrieved December 6, 2011.

Further reading
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