M2.7 earthquake 277 km SW of Adak, Alaska
A magnitude 2.7 earthquake struck 277 km SW of Adak, Alaska on Mon, Jan 22, 2018, 8:24 PM GMT-12 (08:24 UTC), 15 km (10 mi) below the surface.
A larger quake followed: M3.8 Rat Islands, Aleutian Islands, 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
- 2018-01-23 08:24:08 UTC
- Depth
- 15.4 km (9.6 mi), shallow
- Epicenter
- 50.051° N, 179.320° 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 8.3 km horizontally, 25.1 km in depth
- Depth from
- From location
- Station coverage gap
- 273°, poorly surrounded by stations
- Stations used
- 22
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 1 in the 30 days before it.
After
- 2.5264 km SW of Adak, Alaska · 3173 days ago · 25 km deep · 18 km away
- 2.6275 km SW of Adak, Alaska · 3173 days ago · 10 km deep · 9 km away
- 2.2256 km SW of Adak, Alaska · 3173 days ago · 13 km deep · 41 km away
- 2.6271 km SW of Adak, Alaska · 3168 days ago · 10 km deep · 7 km away
- 2.8241 km SSW of Adak, Alaska · 3160 days ago · 10 km deep · 69 km away
- 3.8Rat Islands, Aleutian Islands, Alaska · 3144 days ago · 27 km deep · 90 km away
- 2.5210 km WSW of Adak, Alaska · 3139 days ago · 30 km deep · 97 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000cqzv (also filed as ak18231753, ak0181269m6u). Read Fri, Oct 2, 2026, 3:18 AM UTC.