Alaska earthquakes

M3.1 earthquake 102 km SSW of Sand Point, Alaska

A magnitude 3.1 earthquake struck 102 km SSW of Sand Point, Alaska on Sat, Jul 21, 2018, 2:09 AM AKDT (10:09 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.9 91 km SE of Sand Point, Alaska. This one was a foreshock.

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: 3.1 (ml), minor
Local time: Sat, Jul 21, 2018, 2:09 AM AKDT
UTC: 2018-07-21 10:09:31 UTC
Depth: 5.2 km (3.2 mi), shallow
Epicenter: 54.431° N, 160.829° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

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 3.5 km horizontally, 9.3 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 202°, poorly surrounded by stations
Stations used: 63

Nearest places

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

Sand Point, AlaskaPopulation 1,064. Forecast103 kmSSW

Nearby

Within 100 km, magnitude 1.5 and up: 81 in the 60 days after this one and 52 in the 30 days before it.

After

The first 60 of 81.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000gdz5 (also filed as ak19930731, aacse0189a8kft0, ak0189a8kft0). Read Wed, Sep 30, 2026, 8:15 AM UTC.