M6.0 earthquake 108 km NNW of Adak, Alaska
A magnitude 6.0 earthquake struck 108 km NNW of Adak, Alaska on Sun, Mar 20, 1927, 10:58 PM GMT-11 (09:58 UTC), 15 km (9 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.0 (Mw, moment), moderate
- Magnitude from
- ISC-GEM global catalog
- Local time
- UTC
- 1927-03-21 09:58:55 UTC
- Depth
- 15.0 km (9.3 mi), shallow
- Epicenter
- 52.822° N, 176.985° 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
- ±0.22
- Depth from
- From location
Nearby
Within 100 km, magnitude 3.0 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem909157. Read Thu, Oct 1, 2026, 5:02 AM UTC.