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The northern and southern extensions of the Philippine Fault Zone experience infrequent earthquakes and often described as locked segments which are capable of larger magnitude earthquakes. The largest (M7.0) and most destructive earthquakes are generated along the Guinayangan fault every 30–100 years with slip rates of 20–33 mm/year as ...
On Luzon, the fault zone splays out into a number of different faults, including the Digdig Fault. One of the largest historical earthquake on the fault zone was the 1990 Luzon M s 7.8 event that left nearly 2,000 people dead or missing. The same part of the fault zone is thought to have ruptured in the 1645 Luzon earthquake. [7]
The earthquake came from an area that produced a similar sequence of earthquakes in October 2019 and December 2019 [citation needed], within an active faulting zone known as the Cotabato fault system, which includes the NW-SE trending Makilala-Malungon, M'lang, North and South Columbio and Tangbulan faults, and the SW-NE trending Makilala and ...
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 ...
The North Bohol Fault or Inabanga fault is a reverse fault located at Anonang, Inabanga which was found on 15 October 2013 during the Bohol earthquake. According to the Philippine Institute of Volcanology and Seismology, a new fault occurs only once in a century. The North Bohol fault, shaped as a hanging wall and also known as the "Great Wall ...
It forms part of a linked set of trenches along the western side of the Philippines formed over east-dipping subduction zones, including the Manila Trench and the Negros Trench. [1] At its northern end the rate of convergence across this boundary is about 100 mm per year. [ 2 ]
The earthquake occurred in a region within a faulting zone known as the Cotabato fault system, which is a seismically active region due to the presence of several active faults, including the NW-SE trending Makilala-Malungon, M'lang, North and South Columbio and Tangbulan faults, and the SW-NE trending Makilala and Balabag 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).