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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 and one large zone of strike-slip, all of which are associated with major earthquakes.
United States Geological Survey shake map for the 2019 Luzon earthquake; a maximum Mercalli intensity scale value of 6.6 was observed in Gutad, Floridablanca, Pampanga. The Philippine Institute of Volcanology and Seismology (PHIVOLCS) initially reported an earthquake of magnitude 5.7 striking at 17:11 PST with an epicenter two kilometers N 28° E of Castillejos, Zambales.
The 2019 Eastern Samar Earthquake struck the islands of Visayas in the Philippines on April 23, 2019 at 1:37:51 p.m. ( PST ). [ 3] It had a moment magnitude of 6.5 [ 3] ( M ww 6.4 by USGS) [ 4] and a local magnitude of 6.2 [ 5] with a max intensity of VI based on the PHIVOLCS Earthquake Intensity Scale (PEIS). [ 3]
The subduction tectonics of the Philippines is the control of geology over the Philippine archipelago. The Philippine region is seismically active and has been progressively constructed by plates converging towards each other in multiple directions. [1] The region is also known as the Philippine Mobile Belt due to its complex tectonic setting.
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. [2] 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 earthquake intensity scale. 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 ...
Wadati–Benioff zone. A Wadati–Benioff zone (also Benioff–Wadati zone or Benioff zone or Benioff seismic zone) is a planar zone of seismicity corresponding with the down-going slab in a subduction zone. [1] Differential motion along the zone produces numerous earthquakes, the foci of which may be as deep as about 670 km (420 mi).
Philippine Fault System. The Philippine Fault System is a major inter-related system of geological faults throughout the whole of the Philippine Archipelago, [1] primarily caused by tectonic forces compressing the Philippines into what geophysicists call the Philippine Mobile Belt. [2] Some notable Philippine faults include the Guinayangan ...