M5.9 earthquake 65 km SSW of Atka, Alaska
A magnitude 5.9 earthquake struck 65 km SSW of Atka, Alaska on Tue, Jul 18, 1933, 11:45 PM GMT-11 (10:45 UTC), 35 km (22 mi) below the surface.
A larger quake followed: M6.0 51 km SSE of Atka, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.9 (mw), moderate
- Local time
- UTC
- 1933-07-19 10:45:34 UTC
- Depth
- 35.0 km (21.7 mi), shallow
- Epicenter
- 51.629° N, 174.459° 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 2.5 and up: 4 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 iscgem905721 (also filed as ushis997). Read Mon, Sep 21, 2026, 9:56 PM UTC.