Over 2,800 aftershocks recorded so far after powerful Abra quake — Phivolcs

Published August 6, 2022, 11:34 AM

by Ellalyn De Vera-Ruiz

(Aftermath of the magnitude 7.0 earthquake (Photo courtesy of Dugong Elementary School)

The Philippine Institute of Volcanology and Seismology (Phivolcs) has so far recorded more than 2,800 aftershocks following the magnitude 7.0 earthquake that struck Tayum, Abra on July 27.

As of 10 a.m., Saturday, Aug. 6, Phivolcs had detected 2,887 aftershocks, with magnitudes ranging from 1.4 to 5.1.

Of the recorded earthquakes, 926 earthquakes have been plotted by three or more stations.

Only 59 of the recorded tremors were felt, Phivolcs said.

The 7.0-magnitude earthquake, which struck Abra at 8:43 a.m. on July 27, had shook the provinces in northwestern Luzon and adjacent areas, including Metro Manila.

Phivolcs said the northwestern Luzon is one of the seismically active regions in the country because of the presence of active faults that include the northern segments of the Philippine Fault, Abra River Fault, West Ilocos Fault System, and Naglibacan Fault.

It also noted that there are other nearby local faults, some of which may now be covered by recent deposits, and offshore active faults that are potential sources of minor to strong earthquakes.

 
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