Alaska earthquakes

M4.7 earthquake 93 km W of Elfin Cove, Alaska

A magnitude 4.7 earthquake struck 93 km W of Elfin Cove, Alaska on Sat, May 1, 2021, 7:23 AM AKDT (15:23 UTC), 9 km (6 mi) below the surface.

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Map

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

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The earthquake

Magnitude: 4.7 (ml), light
Local time: Sat, May 1, 2021, 7:23 AM AKDT
UTC: 2021-05-01 15:23:20 UTC
Depth: 9.1 km (5.7 mi), shallow
Epicenter: 58.261° N, 137.926° W
Region: Alaska
Felt reports: 44
Strongest shaking: III, weak shaking
Tsunami flag: Yes: a large quake in an oceanic region
Status: Reviewed by a seismologist

Tsunami

The USGS flags a quake this large in an oceanic region. The flag does not mean a tsunami happened; the tsunami warning centers decide that, and their messages are below when they issued any.

Current tsunami warnings: tsunami.gov. Warnings in force in the US also appear on our alerts pages.

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: III, weak shaking
Peak ground acceleration: 1.1% of gravity
Peak ground velocity: -0.8 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

44 people reported to the USGS what they felt; the strongest reported shaking was V, moderate shaking.

Fault motion and ground failure

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

Faulting: Strike-slip
Moment magnitude: 4.6 Mwr
Nodal plane 1: Strike 161°, dip 62°, rake -175°
Nodal plane 2: Strike 69°, dip 85°, rake -28°

How well it is located

Reviewed by a seismologist.

Stations used: 67

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.7 and up: 8 in the 60 days after this one and 41 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 ak0215kd3gvs (also filed as at00qsfpez, us7000dza1). Read Wed, Sep 30, 2026, 10:13 AM UTC.