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The earthquake struck near Davao Oriental early on Thursday morning, August 12. PHIVOLCS earlier listed the earthquake as magnitude 7.3 at a depth of 69 kilometers, then revised its advisory to a magnitude 7.2 earthquake, which occurred at a depth of 50 kilometers. It later reverted to its original report of a magnitude 7.3 earthquake.
Aftershocks. Some, Strongest is 4.8 Mw. Casualties. 14 injured. On February 7, 2021, at 12:22 PM PST, an earthquake measuring M ww 6.0 struck Davao del Sur and Cotabato. The event registered a Modified Mercalli Intensity Scale (MMI) of VIII ( Severe) with VII on the PHIVOLCS Earthquake Intensity Scale (PEIS).
The PHIVOLCS earthquake intensity scale ( PEIS; Filipino: Panukat ng Pagyanig ng Lindol) [1] is a seismic scale used and developed by the Philippine Institute of Volcanology and Seismology (PHIVOLCS) to measure the intensity of earthquakes . It was developed as upon a specific response to the 1990 Luzon earthquake.
The focal mechanism and depth corresponded to an earthquake of reverse-faulting at an intermediate depth. [5] On the PHIVOLCS Earthquake Intensity Scale (PEIS), intensity VII (Destructive) was instrumentally recorded in Glan, Sarangani. [2] Intensity VI was reported in General Santos as well as in Polomolok and Koronadal, South Cotabato. [2]
PHIVOLCS Observatory at Mount Hibok-Hibok.. The Philippine Institute of Volcanology and Seismology (PHIVOLCS, Tagalog:; Tagalog: Surian ng Pilipinas sa Bulkanolohiya at Sismolohiya) is a Philippine national institution dedicated to provide information on the activities of volcanoes, earthquakes, and tsunamis, as well as other specialized information and services primarily for the protection of ...
List of earthquakes in the Philippines. Earthquakes in the Philippines. Tectonic map of the Philippines. Largest. Mw 8.3 1918 Celebes Sea earthquake. Deadliest. M w 8.0 1976 Moro Gulf earthquake 5,000–8,000 killed. The Philippines lies within the zone of complex interaction between several tectonic plates, involving multiple subduction zones ...
The Marikina Valley Fault System, also known as the Valley Fault System (VFS), is a dominantly right-lateral strike-slip fault system in Luzon, Philippines. It extends from Doña Remedios Trinidad, Bulacan in the north and runs through the provinces of Rizal, and the Metro Manila cities of Quezon, Marikina, Pasig, Taguig and Muntinlupa, and the provinces of Cavite and Laguna that ends in ...
PHIVOLCS initially suspected the earthquake may have occurred on the Abra River Fault. Geologists had been aware of the potential for large earthquakes on the fault. The last known earthquake on the fault was in 1868, measuring 4.0–5.0 in magnitude. The Abra River Fault is a northern extension of the Philippine Fault Zone.