M4.7 earthquake Guam region
A magnitude 4.7 earthquake struck in the Guam region on Sat, Apr 18, 1981, 6:21 PM GMT+10 (08:21 UTC), 112 km (69 mi) below the surface.
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
- 1981-04-18 08:21:39 UTC
- Depth
- 111.6 km (69.3 mi), intermediate-depth
- Epicenter
- 13.051° N, 143.510° E
- Region
- Guam
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
Nearby
Within 100 km, magnitude 1.7 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayGuam earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001d78. Read Tue, Sep 22, 2026, 6:57 AM UTC.