Alaska earthquakes

M4.7 earthquake 63 km S of Sand Point, Alaska

A magnitude 4.7 earthquake struck 63 km S of Sand Point, Alaska on Fri, Jul 31, 2020, 11:00 PM AKDT (07:00 UTC), 39 km (24 mi) below the surface.

A larger quake followed: M5.5 79 km SSW 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.

Open the live map with earthquakes

The earthquake

Magnitude: 4.7 (mwr), light
Local time: Fri, Jul 31, 2020, 11:00 PM AKDT
UTC: 2020-08-01 07:00:12 UTC
Depth: 38.6 km (24.0 mi), shallow
Epicenter: 54.769° N, 160.388° W
Region: Alaska
Felt reports: 1
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

1 person 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: Reverse (thrust)
Moment magnitude: 4.7 Mwr
Nodal plane 1: Strike 73°, dip 81°, rake 86°
Nodal plane 2: Strike 279°, dip 10°, rake 115°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 5.4 km horizontally, 5.4 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 152°
Stations used: 162

Nearest places

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

Sand Point, AlaskaPopulation 1,064. Forecast63 kmS

Nearby

Within 100 km, magnitude 1.7 and up: at least 200 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000b7ve (also filed as ak0209u16bpq). Read Sun, Sep 27, 2026, 6:15 AM UTC.