M2.9 earthquake 248 km S of Atka, Alaska
A magnitude 2.9 earthquake struck 248 km S of Atka, Alaska on Wed, Aug 16, 2017, 10:47 AM HADT (19:47 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M3.3 181 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
- 2.9 (ML, local (Richter)), micro
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-08-16 19:47:55 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 49.997° N, 173.545° 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 |
|---|---|---|---|
| 2.9 | 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 5.5 km horizontally, 2.0 km in depth
- Depth from
- Operator assigned
- Station coverage gap
- 252°, poorly surrounded by stations
- Stations used
- 12
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
- 3.3181 km SSE of Atka, Alaska · 3295 days ago · 10 km deep · 75 km away
- 2.3166 km SSE of Atka, Alaska · 3289 days ago · 30 km deep · 86 km away
- 2.3151 km SSE of Atka, Alaska · 3282 days ago · 26 km deep · 98 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000ad9a (also filed as ak16748309, ak017ahe4nlj). Read Fri, Oct 2, 2026, 9:41 AM UTC.