Alaska earthquakes

M3.5 earthquake 177 km S of False Pass, Alaska

A magnitude 3.5 earthquake struck 177 km S of False Pass, Alaska on Fri, Jan 29, 2016, 1:26 PM AKST (22:26 UTC), 33 km (20 mi) below the surface.

A larger quake followed: M4.0 140 km SE of Akutan, Alaska. This one was a foreshock.

Akutan forecastMore in Alaska

Map

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

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The earthquake

Magnitude
3.5 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2016-01-29 22:26:57 UTC
Depth
32.6 km (20.2 mi), shallow
Epicenter
53.256° N, 163.495° 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.ScaleComputed byNotes
3.5ML, local (Richter)USGS National Earthquake Information CenterPreferred · Confirmed · ±0.128 · 8 stations
2.6ML, local (Richter)Alaska Earthquake CenterPreliminary

What happened

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

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From the USGS event page for us20004yfx. U.S. Geological Survey text and figures are in the public domain.

Did you feel it?

No one has reported feeling this quake to the USGS.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 12.2 km horizontally, 13.8 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
210°, poorly surrounded by stations
Stations used
9

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 58 in the 60 days after this one and 39 in the 30 days before it.

After

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us20004yfx (also filed as ak12719573, ak0161cbudza). Read Sun, Oct 4, 2026, 11:29 PM UTC.