The Philippine Institute of Volcanology and Seismology (Phivolcs) announced on Saturday, October 11, that a total of 824 aftershocks were recorded following the powerful magnitude 7.4 and 6.8 offshore earthquakes that struck Davao Oriental on October 10.
In its latest advisory, Phivolcs noted that 346 of these aftershocks were successfully plotted, with 13 felt by residents.
The recorded magnitudes ranged from 1.2 to 5.8, based on data from the Mati seismic station. The twin earthquakes, classified as a “doublet” event, triggered intense ground shaking across Davao Oriental, Davao de Oro, and surrounding provinces.
The tremors prompted immediate safety inspections and led to the temporary suspension of classes and government operations in the affected areas.
Meanwhile, Phivolcs reported ongoing seismic activity in Cebu following the magnitude 6.9 offshore earthquake on September 30.
As of the same monitoring period, 10,671 aftershocks were recorded from the Cebu quake, of which 1,863 were plotted and 45 were felt by residents.
Magnitudes ranged from 1.0 to 5.1, based on data from the Medellin, Cebu (MECP) seismic station.
Phivolcs said it continues to closely monitor both seismic sequences and reminded the public to stay alert for strong aftershocks and follow local authorities’ advisories. (Merlina Hernando-Malipot)
