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The focal mechanism and depth corresponded to an earthquake of reverse-faulting at an intermediate depth. [5] On the PHIVOLCS earthquake intensity scale (PEIS), intensity VII (Destructive) was instrumentally recorded in Glan, Sarangani. [2] Intensity VI was reported in General Santos as well as in Polomolok and Koronadal, South Cotabato. [2]
However, PHIVOLCS said that it was a separate earthquake. [10] On August 2, 2024, two M ww 6.8 and 6.3 earthquakes occurred within the area of the 2023 sequence. [11] [12] The December 2 earthquake was described as the first major earthquake in the area since a doublet 7.1 and 7.5 earthquake that also produced a tsunami in 1992. [13]
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 ...
Increased activity was recorded by PHIVOLCS in September, starting with a series of volcano-tectonic earthquakes on September 9. [13] On September 10, Kanlaon produced its highest volume of sulfur dioxide emissions since 2009, at 9,985 tonnes, prompting PHIVOLCS to raise concern over its possible first magmatic eruption since 1902. [14]
PHIVOLCS Observatory at Mount Hibok-Hibok.. The Philippine Institute of Volcanology and Seismology (PHIVOLCS, Filipino:; Filipino: 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 1975 M w 7.6 earthquake was caused by intra-slab normal faulting, while the 2012 M7.6 was a result of thrust faulting within the descending slab. [ 3 ] The relatively young Cotabato Trench subduction zone has been associated with several large megathrust earthquakes, including the 1918 Celebes Sea earthquake (M8.3), the 1976 Moro Gulf ...
Seismic intensity scales categorize the intensity or severity of ground shaking (quaking) at a given location, such as resulting from an earthquake.They are distinguished from seismic magnitude scales, which measure the magnitude or overall strength of an earthquake, which may, or perhaps may not, cause perceptible shaking.
The earthquake lasted for a minute and was produced by the Makilala-Malungon Fault which PHIVOLCS stated that could possibly produce a Magnitude 7.2 earthquake, with a possible Intensity VIII. [citation needed] Eight minutes after the mainshock a M w 3.5 aftershock followed which felt III.