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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.
The United States Geological Survey (USGC) recorded the depth of focus for the earthquake at 6.5 kilometers (4.0 mi), [5] deeper than what is recorded by PHIVOLCS.. The tremor was caused by the movement of the Leyte Segment of the Philippine Fault.
The 2010 Mindanao earthquakes occurred in the southern Philippines in the Moro Gulf.This was a complex sequence of events including three main events (a triplet earthquake) of M w magnitude 7.3 or greater on the 23rd of July, and two significant aftershocks of magnitude 6.6 on the 24th and 29th.
The 2017 Batangas earthquakes were an earthquake swarm [2] that occurred from early April to mid-August 2017, affecting the province of Batangas in the Philippines and other nearby areas. The first major earthquake occurred on April 4 at 8:58 pm Philippine Standard Time, with a surface-wave magnitude of 5.5 off the coast of Batangas.
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]
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 2012 Negros earthquake occurred on February 6 at 11:49 PST, with a body wave magnitude of 6.7 and a maximum intensity of VII (Destructive) off the coast of Negros Oriental, Philippines. The epicenter of the thrust fault earthquake [6] was approximately 72 kilometres (45 mi) north of Negros Oriental's provincial capital, Dumaguete. [7] [8] [9]
The 1948 Lady Caycay earthquake occurred at 01:46 PST on 25 January 1948 with an estimated moment magnitude of 7.8 and a maximum Mercalli intensity of X (Extreme).The epicenter was between the municipalities of Anini-y, Antique, and Dao (present-day Tobias Fornier in Antique) on Panay Island, Philippines.