Phivolcs detects an earthquake swarm off Bolinao, Pangasinan

MANILA, Philippines — An earthquake swarm off the shore of Bolinao, Pangasinan has been recorded by the Philippine Institute of Volcanology and Seismology (Phivolcs) since May 27, 2026.

According to Phivolcs, it logged 287 earthquakes as of Friday, 7 a.m.

The strength of the tremors ranged from magnitude 1.8 to magnitude 5.8.

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The depths ranged from 2 to 47 kilometers.

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The bureau explained that an earthquake swarm is “a series of earthquakes that are closely clustered in space and time, without a clearly defined mainshock-aftershock pattern.”

It added that swarms “may persist for days, weeks, or, in some cases, even longer” and may or may not lead to stronger earthquakes.

Nevertheless, the institute advised residents to practice the following precautionary measures:

Be vigilant and practice earthquake preparedness.

Know the safest and fastest route to the evacuation area.

Prepare an emergency supply kit.

Do the “duck, cover and hold” during an earthquake.

It also reminded coastal communities of the natural signs of a tsunami such as a strong and long-lasting earthquake, unusual sea behavior, and loud roaring sound from the ocean.

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“If you observe any of these signs, immediately move to higher ground,” Phivolcs said. /apl

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