Alaska earthquakes

M5.2 earthquake 122 km WSW of Adak, Alaska

A magnitude 5.2 earthquake struck 122 km WSW of Adak, Alaska on Sun, Mar 10, 2019, 9:23 PM HADT (06:23 UTC), 51 km (32 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: 5.2 (Mww, W-phase moment), moderate
Magnitude from: USGS National Earthquake Information Center
Local time: Sun, Mar 10, 2019, 9:23 PM HADT
UTC: 2019-03-11 06:23:14 UTC
Depth: 51.3 km (31.8 mi), shallow
Epicenter: 51.436° N, 178.260° W
Region: Alaska
Felt reports: 1
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
5.2	Mww, W-phase moment	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.053 · 34 stations
5.21	Mw, moment	ISC-GEM global catalog	Final · ±0.1
5.2	Mww, W-phase moment	Alaska Earthquake Center	Preliminary

What happened

The USGS’s account of the effects of this earthquake.

Felt on Adak.

From the USGS event page for us1000jdg2. U.S. Geological Survey text and figures are in the public domain.

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was I, not felt shaking.

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: 5.2 Mww
Nodal plane 1: Strike 274°, dip 34°, rake 125°
Nodal plane 2: Strike 53°, dip 63°, rake 69°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 5.5 km horizontally, 3.7 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 35°
Stations used: 508

Nearby

Within 100 km, magnitude 2.2 and up: 97 in the 60 days after this one and 28 in the 30 days before it.

After

The first 60 of 97.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000jdg2 (also filed as ak01937vbus7, iscgem615179987). Read Thu, Oct 1, 2026, 8:13 PM UTC.