1994 Mindoro earthquake
| Date | November 14, 1994 at 19:15 UTC |
|---|---|
| Magnitude | 7.1 Mw |
| Depth | 33 km |
| Epicenter | 13°32′N 121°05′E / 13.53°N 121.09°E |
| Type | Strike-slip [1] |
| Areas affected | Philippines |
| Tsunami | Yes |
| Casualties | 78 killed |
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The 1994 Mindoro earthquake occurred on November 15 at 03:15 local time near Mindoro, the Philippines. It had a moment magnitude of 7.1. It is associated with a 35 kilometer-long ground rupture, called the Aglubang River fault.[2] Seventy eight people were reported dead,[3] 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.[4] The released seismic moment was about 5.12×1019 Nm.[5]
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 and a maximum vertical displacement of 1.9 meters.[2][6]
Tsunami
The earthquake generated a tsunami, which affected Mindoro, the Verde Island, the Baco Islands,[7] 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.[8] The tsunami was larger than expected considering the strike-slip movement of the earthquake.[1]
References
- 1 2 Tanioka, Y.; Satake, K. (1996), "Tsunami generation by horizontal displacement of ocean bottom" (PDF), Geophysical Research Letters, Wiley, 23 (8): 863, 864, Bibcode:1996GeoRL..23..861T, doi:10.1029/96GL00736
- 1 2 Rimando, R.E., Punongbayan, R.S., Geronimo-Catane, S.G., Mirabueno, H.S., Rasdas, A.S., 1995. Ground rupture of the 15 November 1994 Oriental Mindoro (Philippines) earthquake. XXI General Assembly of IUGG, Abstracts, p. A422.
- ↑ http://earthquake.usgs.gov/earthquakes/eqarchives/significant/sig_1994.php
- ↑ http://wwwsoc.nii.ac.jp/jepsjmo/cd-rom/2005cd-rom/pdf/s052/s052p-004_e.pdf
- ↑ http://www.eri.u-tokyo.ac.jp/sanchu/World/Ev/19941114/
- ↑ PHIVOLCS Quick Response Teams, December, 1994. PHIVOLCS Special Report No. 2. THE 15 November 1994 Mindoro Earthquake.
- ↑ http://www.ess.washington.edu/tsunami/specialized/events/mindoro/report.html
- ↑ http://www.drs.dpri.kyoto-u.ac.jp/eqtap/report/philippine/field_survey_report/field_survey_report.htm