M2.8 earthquake 219 km SSE of Adak, Alaska
A magnitude 2.8 earthquake struck 219 km SSE of Adak, Alaska on Tue, Feb 7, 2017, 9:50 AM HAST (19:50 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.1 173 km S 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
- 2.8 (ML, local (Richter)), micro
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-02-07 19:50:21 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 50.217° N, 174.932° 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 |
|---|---|---|---|
| 2.8 | ML, local (Richter) | USGS National Earthquake Information Center | Preferred · Reviewed |
| 2.8 | 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 5.4 km horizontally, 2.0 km in depth
- Depth from
- Operator assigned
- Station coverage gap
- 238°, poorly surrounded by stations
- Stations used
- 11
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.1173 km S of Atka, Alaska · 3503 days ago · 10 km deep · 60 km away
- 2.3158 km SSE of Adak, Alaska · 3492 days ago · 30 km deep · 64 km away
- 2.6140 km SSE of Adak, Alaska · 3469 days ago · 10 km deep · 89 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us20008juw (also filed as ak15269428, ak0171r6176d). Read Sat, Oct 3, 2026, 8:13 AM UTC.