Alaska earthquakes

M3.7 earthquake 18 km ENE of Tatitlek, Alaska

A magnitude 3.7 earthquake struck 18 km ENE of Tatitlek, Alaska on Wed, Jul 7, 2021, 12:31 PM AKDT (20:31 UTC), 7 km (4 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: 3.7 (ml), minor
Local time: Wed, Jul 7, 2021, 12:31 PM AKDT
UTC: 2021-07-07 20:31:25 UTC
Depth: 6.5 km (4.0 mi), shallow
Epicenter: 60.903° N, 146.339° W
Region: Alaska
Felt reports: 2
Strongest shaking: III, weak shaking
Tsunami flag: No
Status: Reviewed by a seismologist

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: 0.5% of gravity
Peak ground velocity: -1.7 cm/s
Map: Automatic

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

Did you feel it?

2 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

Fault motion and ground failure

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

Faulting: Oblique normal
Moment magnitude: 3.8 Mwr
Nodal plane 1: Strike 229°, dip 66°, rake -42°
Nodal plane 2: Strike 340°, dip 52°, rake -149°

How well it is located

Reviewed by a seismologist.

Stations used: 201

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 74 in the 60 days after this one and 40 in the 30 days before it.

After

The first 60 of 74.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0218n94m2m (also filed as us6000eszr). Read Sat, Sep 26, 2026, 2:38 PM UTC.