Alaska earthquakes

M4.9 earthquake 290 km WSW of Adak, Alaska

A magnitude 4.9 earthquake struck 290 km WSW of Adak, Alaska on Tue, May 16, 2017, 11:41 PM GMT+12 (11:41 UTC), 10 km (6 mi) below the surface.

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The earthquake

Magnitude: 4.9 (mb, body-wave), light
Magnitude from: USGS National Earthquake Information Center
Local time: Tue, May 16, 2017, 11:41 PM GMT+12
UTC: 2017-05-16 11:41:50 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 51.146° N, 179.341° E
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
4.9	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.029 · 381 stations
5.07	Mw, moment	ISC-GEM global catalog	Final · ±0.1
5.1	Mw, moment	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 7.1 km horizontally, 1.8 km in depth
Magnitude uncertainty: ±0.03
Depth from: Operator assigned
Station coverage gap: 102°
Stations used: 401

Nearby

Within 100 km, magnitude 1.9 and up: 111 in the 60 days after this one and 31 in the 30 days before it.

After

The first 60 of 111.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us10008spv (also filed as ak16043905, ak017693vvag, iscgem611833906). Read Sat, Oct 3, 2026, 1:23 AM UTC.