M2.7 earthquake 183 km SSE of Old Harbor, Alaska
A magnitude 2.7 earthquake struck 183 km SSE of Old Harbor, Alaska on Sat, Aug 7, 2021, 9:22 AM AKDT (17:22 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M3.3 105 km SE of Akhiok, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.7 (ml), micro
- Local time
- UTC
- 2021-08-07 17:22:10 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 55.813° N, 151.691° 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.
- Location uncertainty
- About 4.5 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- Operator assigned
- Station coverage gap
- 266°, poorly surrounded by stations
- Stations used
- 44
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 2 in the 30 days before it.
After
- 2.8248 km SSE of Old Harbor, Alaska · 1868 days ago · 10 km deep · 78 km away
- 2.2178 km SSE of Old Harbor, Alaska · 1861 days ago · 27 km deep · 38 km away
- 3.3105 km SE of Akhiok, Alaska · 1849 days ago · 25 km deep · 94 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000f38p (also filed as ak021a2gy6qr). Read Mon, Sep 28, 2026, 1:08 PM UTC.