M4.7 earthquake 97 km SW of Basco, Philippines
A magnitude 4.7 earthquake struck 97 km SW of Basco, Philippines on Wed, May 6, 1981, 9:36 AM GMT+8 (01:36 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.1 72 km N of Claveria, Philippines. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb), light
- Local time
- UTC
- 1981-05-06 01:36:18 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 19.897° N, 121.245° 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
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 2 in the 60 days after this one and 3 in the 30 days before it.
After
- 5.172 km N of Claveria, Philippines · 16545 days ago · 36 km deep · 75 km away
- 4.779 km SW of Basco, Philippines · 16525 days ago · 41 km deep · 20 km away
Before
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001dj1 (also filed as iscgemsup626247). Read Mon, Sep 21, 2026, 7:42 PM UTC.