Alaska earthquakes

M3.6 earthquake 193 km S of Sand Point, Alaska

A magnitude 3.6 earthquake struck 193 km S of Sand Point, Alaska on Tue, Aug 10, 2021, 1:15 PM AKDT (21:15 UTC), 10 km (6 mi) below the surface.

Sand Point forecast More in Alaska

Map

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

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The earthquake

Magnitude: 3.6 (mb), minor
Local time: Tue, Aug 10, 2021, 1:15 PM AKDT
UTC: 2021-08-10 21:15:52 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 53.619° N, 160.035° W
Region: Alaska
Strongest shaking: I, not felt 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: I, not felt shaking
Peak ground acceleration: 0.0% of gravity
Peak ground velocity: -5.7 cm/s
Map: Automatic

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

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 3.9 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.20
Depth from: Operator assigned
Station coverage gap: 259°, poorly surrounded by stations
Stations used: 37

Nearest places

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

Sand Point, AlaskaPopulation 1,064. Forecast193 kmS

Nearby

Within 100 km, magnitude 1.5 and up: 108 in the 60 days after this one and 63 in the 30 days before it.

After

The first 60 of 108.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000f3yx (also filed as ak021a7hwh5w). Read Wed, Sep 23, 2026, 10:10 AM UTC.