M7.2 earthquake 238 km SSE of Attu Station, Alaska
A magnitude 7.2 earthquake struck 238 km SSE of Attu Station, Alaska on Sat, Sep 9, 1939, 12:04 AM GMT+12 (12:04 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
- 7.2 (Mw, moment), major
- Magnitude from
- ISC-GEM global catalog
- Local time
- UTC
- 1939-09-08 12:04:47 UTC
- Depth
- 15.0 km (9.3 mi), shallow
- Epicenter
- 50.999° N, 174.959° E
- 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
- ±0.27
- Depth from
- From location
Nearby
Within 100 km, magnitude 4.2 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 iscgem902140. Read Thu, Oct 1, 2026, 11:52 AM UTC.