M5.5 earthquake Guam region
A magnitude 5.5 earthquake struck in the Guam region on Sat, Dec 27, 1986, 12:28 PM GMT+10 (02:28 UTC), 117 km (73 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.5 (mb), moderate
- Local time
- UTC
- 1986-12-27 02:28:41 UTC
- Depth
- 116.8 km (72.6 mi), intermediate-depth
- Epicenter
- 13.865° N, 144.503° 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 2.5 and up: 2 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 usp0003163. Read Tue, Sep 22, 2026, 10:28 AM UTC.