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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. PHIVOLCS cites seismic scale ...
PHIVOLCS Observatory at Mount Hibok-Hibok.. The Philippine Institute of Volcanology and Seismology (PHIVOLCS, Tagalog:; Tagalog: Surian ng Pilipinas sa Bulkanolohiya at Sismolohiya [2]) 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 ...
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.
The main hazard comes from shallow fault sources, such as the Marikina Valley Fault System, but there is an important contribution to the overall hazard from the Manila subduction zone to the west and the potential for strong shaking from earthquakes originating the Philippines Trench to the east.
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 Cotabato sequence was followed by an earthquake, with a magnitude of M w 6.8 (ANSS) or M s 6.9 (PHIVOLCS), on December 15 at 14:11 PST with an epicenter in the neighboring province of Davao del Sur. It had a hypocentral depth of between 22.4 km (ANSS) and 3.0 km (PHIVOLCS) and a maximum felt intensity of VII MMI or VII PEIS. [46]
The 2019 Eastern Samar Earthquake struck the islands of Visayas in the Philippines on April 23, 2019, at 1:37:51 p.m. . [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 2013 Bohol earthquake was a deadly event which happened on 15 October, striking the provinces of Bohol, Cebu, Negros Oriental, Masbate and Leyte. The M w 7.2 earthquake produced a ~50-km-long, ~12-km-wide northeast trending zone of uplift with an ~8-km-long discontinuous ground rupture indicating predominantly reverse-slip movement on a ...