M5.8 earthquake 61 km ESE of Adak, Alaska
A magnitude 5.8 earthquake struck 61 km ESE of Adak, Alaska on Sun, Mar 20, 1927, 9:46 PM GMT-11 (08:46 UTC), 15 km (9 mi) below the surface.
A larger quake followed: M6.1 106 km SE of Adak, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.8 (Mw, moment), moderate
- Magnitude from
- ISC-GEM global catalog
- Local time
- UTC
- 1927-03-21 08:46:34 UTC
- Depth
- 15.0 km (9.3 mi), shallow
- Epicenter
- 51.620° N, 175.838° 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
- ±0.20
- Depth from
- From location
Nearby
Within 100 km, magnitude 2.8 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem909156. Read Thu, Oct 1, 2026, 12:11 PM UTC.