Alaska earthquakes

M5.1 earthquake 90 km E of Adak, Alaska

A magnitude 5.1 earthquake struck 90 km E of Adak, Alaska on Wed, Mar 6, 2019, 11:46 PM HAST (09:46 UTC), 46 km (29 mi) below the surface.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 5.1 (Mww, W-phase moment), moderate
Magnitude from: USGS National Earthquake Information Center
Local time: Wed, Mar 6, 2019, 11:46 PM HAST
UTC: 2019-03-07 09:46:00 UTC
Depth: 46.3 km (28.8 mi), shallow
Epicenter: 51.751° N, 175.340° 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
5.1	Mww, W-phase moment	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.05 · 38 stations
5.17	Mw, moment	ISC-GEM global catalog	Final · ±0.1
5.1	Mww, W-phase moment	Alaska Earthquake Center	Preliminary

Did you feel it?

No one has reported feeling this quake to the USGS.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Oblique reverse
Moment magnitude: 5.1 Mww
Nodal plane 1: Strike 282°, dip 37°, rake 130°
Nodal plane 2: Strike 55°, dip 63°, rake 64°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 3.1 km horizontally, 5.8 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 139°
Stations used: 79

Nearby

Within 100 km, magnitude 2.1 and up: 51 in the 60 days after this one and 23 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000jbsv (also filed as ak01931b3o0b, iscgem615098380). Read Thu, Oct 1, 2026, 1:09 PM UTC.