M5.9 earthquake 52 km SE of Atka, Alaska
A magnitude 5.9 earthquake struck 52 km SE of Atka, Alaska on Tue, Jul 18, 1933, 11:54 PM GMT-11 (10:54 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 10:54:02 UTC
- Depth
- 35.0 km (21.7 mi), shallow
- Epicenter
- 51.821° N, 173.748° 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
- ±0.59
- Depth from
- From location
Nearby
Within 100 km, magnitude 2.5 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 6.051 km SSE of Atka, Alaska · 34033 days ago · 19 km away
- 6.165 km S of Atka, Alaska · 34033 days ago · 35 km deep · 37 km away
- 6.143 km S of Atka, Alaska · 34033 days ago · 35 km deep · 33 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem905722. Read Tue, Sep 22, 2026, 5:39 AM UTC.