M5.1 earthquake 91 km SSE of Old Harbor, Alaska
A magnitude 5.1 earthquake struck 91 km SSE of Old Harbor, Alaska on Mon, Sep 20, 1971, 11:54 AM GMT-9 (20:54 UTC), 25 km (16 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.1 (mw), moderate
- Local time
- UTC
- 1971-09-20 20:54:14 UTC
- Depth
- 25.3 km (15.7 mi), shallow
- Epicenter
- 56.399° N, 152.957° 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
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.1 and up: 0 in the 60 days after this one and 1 in the 30 days before it.
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem780475. Read Tue, Sep 22, 2026, 4:39 AM UTC.