Alaska earthquakes

M2.5 earthquake 26 km NW of Valdez, Alaska

A magnitude 2.5 earthquake struck 26 km NW of Valdez, Alaska on Wed, Sep 20, 2017, 11:35 PM AKDT (07:35 UTC), 18 km (11 mi) below the surface.

A larger quake followed: M3.5 37 km WNW of Valdez, Alaska. This one was a foreshock.

Valdez 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: 2.5 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Wed, Sep 20, 2017, 11:35 PM AKDT
UTC: 2017-09-21 07:35:47 UTC
Depth: 18.1 km (11.2 mi), shallow
Epicenter: 61.302° N, 146.700° W
Region: Alaska
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
2.5	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
2.5	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Stations used: 135

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 92 in the 60 days after this one and 41 in the 30 days before it.

After

The first 60 of 92.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak017c4q99b2 (also filed as ak16874613, us2000asd7). Read Sat, Oct 3, 2026, 9:38 PM UTC.