M2.7 earthquake 238 km SW of Adak, Alaska
A magnitude 2.7 earthquake struck 238 km SW of Adak, Alaska on Sat, Mar 11, 2017, 3:10 AM HAST (13:10 UTC), 37 km (23 mi) below the surface.
A larger quake followed: M3.6 211 km SW of Adak, 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, local (Richter)), micro
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-03-11 13:10:38 UTC
- Depth
- 37.1 km (23.1 mi), shallow
- Epicenter
- 50.225° N, 178.812° W
- Region
- Alaska
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 2.7 | ML, local (Richter) | USGS National Earthquake Information Center | Preferred · Reviewed |
| 2.7 | ML, local (Richter) | Alaska Earthquake Center | Preliminary |
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 10.0 km horizontally, 23.4 km in depth
- Depth from
- From location
- Station coverage gap
- 252°, poorly surrounded by stations
- Stations used
- 10
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 3.1224 km SSW of Adak, Alaska · 3474 days ago · 24 km deep · 41 km away
- 2.1193 km WSW of Adak, Alaska · 3471 days ago · 6 km deep · 94 km away
- 2.2190 km WSW of Adak, Alaska · 3465 days ago · 23 km deep · 91 km away
- 3.6211 km SW of Adak, Alaska · 3465 days ago · 10 km deep · 60 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us20008sbz (also filed as ak15499332, ak01737zf5cg). Read Sat, Oct 3, 2026, 12:03 AM UTC.