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The seismological arm of PAGASA was officially transferred to PHIVOLC [9] on September 17, 1984 through Executive Order No. 984, renaming the institute as the Philippines Institute of Volcanology and Seismology or PHIVOLCS. [10] The NSTA, the umbrella department for PHIVOLCS and PAGASA, became the Department of Science and Technology (DOST) in ...
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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, running through the provinces of Rizal, the Metro Manila cities of Quezon, Marikina, Pasig, Taguig and Muntinlupa, and the provinces of Cavite and Laguna, before ending in ...
There was a foreshock which preceded the main quake, recorded M w 4.8 at 7:28 AM PST by Philippine Institute of Volcanology and Seismology with a PHIVOLCS Earthquake Intensity Scale of IV (Moderately Strong). [2]
The earthquake produced an onshore surface rupture 30 km along the Guinayangan segment of the Philippine Fault. It also caused left-lateral offset on a beach line for approximately 3.2 meters. [ 8 ] [ 9 ] There were also fissures, one of them being 15 centimeters in width.
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, Masbate and Leyte faults.
The earthquake may be the result of movement on the Tangbulan Fault, according to PHIVOLCS. [ 7 ] [ 8 ] [ 9 ] There were a series of large aftershocks , including nine of M ≥ 5.0 in the first 48 hours after the mainshock, [ 10 ] with the largest being an mb 5.7 event about an hour afterwards, which had a maximum felt intensity of VII (MMI).
This is a list of potentially active volcanoes in the Philippines, as classified by the Philippine Institute of Volcanology and Seismology. Map all coordinates using OpenStreetMap Download coordinates as: