M4.2 earthquake 237 km SSW of Adak, Alaska
A magnitude 4.2 earthquake struck 237 km SSW of Adak, Alaska on Thu, Mar 2, 2017, 11:58 AM HAST (21:58 UTC), 34 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-03-02 21:58:29 UTC
- Depth
- 34.5 km (21.4 mi), shallow
- Epicenter
- 50.110° N, 178.546° 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 |
|---|---|---|---|
| 4.2 | mb, body-wave | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.072 · 53 stations |
| 4.2 | mb, body-wave | 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, 10.5 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- From location
- Station coverage gap
- 222°, poorly surrounded by stations
- Stations used
- 66
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
- 2.7238 km SW of Adak, Alaska · 3493 days ago · 37 km deep · 23 km away
- 3.1224 km SSW of Adak, Alaska · 3475 days ago · 24 km deep · 21 km away
- 1.8170 km SSW of Adak, Alaska · 3470 days ago · 7 km deep · 95 km away
- 3.6211 km SW of Adak, Alaska · 3466 days ago · 10 km deep · 79 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us100086m3 (also filed as ak15430114, ak0172t8mrez). Read Sat, Oct 3, 2026, 3:02 PM UTC.