M4.5 earthquake 60 km W of Basco, Philippines
A magnitude 4.5 earthquake struck 60 km W of Basco, Philippines on Thu, Apr 23, 1987, 6:42 AM GMT+8 (22:42 UTC), 42 km (26 mi) below the surface.
A larger quake followed: M6.3 63 km W of Basco, Philippines. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb), light
- Local time
- UTC
- 1987-04-22 22:42:59 UTC
- Depth
- 41.7 km (25.9 mi), shallow
- Epicenter
- 20.422° N, 121.392° E
- Region
- Philippines
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Depth from
- FROM_LOCATION
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00034cv. Read Thu, Sep 24, 2026, 9:06 AM UTC.