M5.5 earthquake 71 km SW of Adak, Alaska
A magnitude 5.5 earthquake struck 71 km SW of Adak, Alaska on Mon, May 10, 1971, 12:58 PM GMT-10 (22:58 UTC), 35 km (22 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.5 (mw), moderate
- Local time
- UTC
- 1971-05-10 22:58:05 UTC
- Depth
- 35.0 km (21.7 mi), shallow
- Epicenter
- 51.370° N, 177.267° W
- Region
- Alaska
- 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.
- Magnitude uncertainty
- ±0.65
- Depth from
- From location
Nearby
Within 100 km, magnitude 2.5 and up: 0 in the 60 days after this one and 1 in the 30 days before it.
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem784307. Read Thu, Sep 24, 2026, 12:56 PM UTC.