Alaska earthquakes

M4.8 earthquake 37 km ESE of Akutan, Alaska

A magnitude 4.8 earthquake struck 37 km ESE of Akutan, Alaska on Mon, Jul 31, 2017, 1:02 AM AKDT (09:02 UTC), 70 km (43 mi) below the surface.

Akutan 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: 4.8 (mb, body-wave), light
Magnitude from: USGS National Earthquake Information Center
Local time: Mon, Jul 31, 2017, 1:02 AM AKDT
UTC: 2017-07-31 09:02:56 UTC
Depth: 69.7 km (43.3 mi), shallow
Epicenter: 53.974° N, 165.265° W
Region: Alaska
Felt reports: 3
Strongest shaking: III, weak shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
4.8	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.039 · 206 stations
4.8	mb, body-wave	Alaska Earthquake Center	Preliminary

What happened

The USGS’s account of the effects of this earthquake.

Felt at Akutan and Unalaska.

From the USGS event page for us2000a2um. U.S. Geological Survey text and figures are in the public domain.

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
Map: Automatic

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

Did you feel it?

3 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 5.3 km horizontally, 4.9 km in depth
Magnitude uncertainty: ±0.04
Depth from: From location
Station coverage gap: 129°
Stations used: 105

Nearest places

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

Akutan, AlaskaPopulation 1,040. Forecast38 kmESE

Nearby

Within 100 km, magnitude 1.8 and up: 88 in the 60 days after this one and 23 in the 30 days before it.

After

The first 60 of 88.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000a2um (also filed as ak16389446, ak0179qrb0w7). Read Fri, Oct 2, 2026, 4:36 AM UTC.