M4.9 earthquake 63 km E of Union, Philippines

A magnitude 4.9 earthquake struck 63 km E of Union, Philippines on Wed, Apr 29, 1987, 8:53 AM GMT+8 (00:53 UTC), 71 km (44 mi) below the surface.

A larger quake followed: M5.0 26 km E of Pilar, Philippines. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.9 and up: 16 in the 60 days after this one and 0 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event usp00034js. Read Thu, Sep 24, 2026, 9:06 AM UTC.