The Philippine Institute of Volcanology and Seismology (Phivolcs) has so considerably recorded far more than 2,800 aftershocks adhering to the July 27 magnitude 7. earthquake in Abra Tayum.
As of 10 a.m. Saturday, August 6, Phivolcs experienced detected 2,887 aftershocks, ranging in magnitude from 1.4 to 5.1.
Of the recorded earthquakes, 926 were mapped by a few or extra stations.
Of the tremors recorded, only 59 ended up felt, Phivolcs mentioned.
The 7.-magnitude earthquake hit Abra at 8:43 a.m. on July 27, shaking provinces in northwestern Luzon and adjacent places, which include Metro Manila.
Phivolcs stated northwest Luzon is one of the seismically lively parts in the region thanks to the existence of energetic faults together with the northern segment of the Philippine Fault, the Abra River Fault, the West Ilocos Fault Program and the Naglibakan Fault.
It also noted that there are other localized faults nearby, some of which could now be coated by the latest sediments, and that energetic faults in the sea are probable sources of little to powerful earthquakes.
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