M2.5 earthquake 209 km S of Atka, Alaska
A magnitude 2.5 earthquake struck 209 km S of Atka, Alaska on Sat, Sep 17, 2016, 10:12 AM HADT (19:12 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M3.3 200 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
- 2.5 (ML, local (Richter)), micro
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2016-09-17 19:12:26 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 50.347° N, 174.775° 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 |
|---|---|---|---|
| 2.5 | ML, local (Richter) | USGS National Earthquake Information Center | Preferred · Reviewed |
| 2.5 | 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 9.2 km horizontally, 2.0 km in depth
- Depth from
- Operator assigned
- Station coverage gap
- 275°, poorly surrounded by stations
- Stations used
- 13
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 1 in the 30 days before it.
After
- 1.9156 km SSE of Adak, Alaska · 3660 days ago · 26 km deep · 99 km away
- 2.5125 km SSW of Atka, Alaska · 3651 days ago · 25 km deep · 94 km away
- 3.1127 km S of Atka, Alaska · 3645 days ago · 39 km deep · 99 km away
- 2.8181 km SSE of Atka, Alaska · 3642 days ago · 26 km deep · 93 km away
- 2.7162 km SSE of Adak, Alaska · 3642 days ago · 20 km deep · 62 km away
- 3.3200 km SSE of Atka, Alaska · 3637 days ago · 10 km deep · 82 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us10006s52 (also filed as ak13997073, ak016bzyng70). Read Sun, Oct 4, 2026, 3:19 PM UTC.