M2.5 earthquake 270 km SSW of Adak, Alaska
A magnitude 2.5 earthquake struck 270 km SSW of Adak, Alaska on Sat, Aug 24, 2019, 3:31 PM GMT-12 (03:31 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.3 241 km SSW 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
- 2.5 (ML, local (Richter)), micro
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2019-08-25 03:31:00 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 49.836° N, 178.737° 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 4.1 km horizontally, 2.0 km in depth
- Depth from
- Operator assigned
- Station coverage gap
- 273°, poorly surrounded by stations
- Stations used
- 17
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 2 in the 30 days before it.
After
- 2.6261 km SW of Adak, Alaska · 2584 days ago · 10 km deep · 53 km away
- 3.0245 km SSW of Adak, Alaska · 2582 days ago · 35 km deep · 44 km away
- 2.1212 km SSW of Adak, Alaska · 2554 days ago · 37 km deep · 59 km away
- 4.3241 km SSW of Adak, Alaska · 2545 days ago · 10 km deep · 37 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us60005m1y (also filed as ak019aw0c7dj). Read Fri, Oct 2, 2026, 7:25 AM UTC.