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Phivolcs Warns of Continued Seismic Activity in Mindanao Following Recent Strong Quakes

Strong Quakes in Mindanao
Strong Quakes in Mindanao

The Philippine Institute of Volcanology and Seismology (Phivolcs) has issued a warning that strong quakes are still possible in Surigao del Sur and throughout Mindanao in the wake of a 7.4-magnitude earthquake that occurred on December 2. In an 11-page report published on Wednesday, Phivolcs utilized Coulomb stress transfer modeling to illustrate how one strong earthquake may influence the occurrence of additional strong quakes in Mindanao.

The report explained that this modeling technique is based on the concept that areas experiencing increased stress are more likely to host earthquakes, while areas with decreased stress are less likely to generate seismic activity. Philippine Institute of Volcanology and Seismology noted that the 6.8-magnitude earthquake that occurred on December 4 was influence by increased stress resulting from the earlier 7.4-magnitude earthquake. Highlighting the interconnected nature of seismic events in subduction zones.

The report also raised concerns about the potential for aftershocks, including the possibility of another mainshock, in specific areas, and the risk of triggering shallower earthquakes along the Philippine Trench, which could lead to tsunamis. Phivolcs emphasized the importance of earthquake preparedness and response in the Mindanao region given the ongoing seismic activity.

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