Alaska earthquakes

M4.1 earthquake 134 km SSE of False Pass, Alaska

A magnitude 4.1 earthquake struck 134 km SSE of False Pass, Alaska on Fri, Dec 22, 2017, 4:49 PM AKST (01:49 UTC), 10 km (6 mi) below the surface.

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Map

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

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The earthquake

Magnitude
4.1 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2017-12-23 01:49:57 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
53.689° N, 162.866° W
Region
Alaska
Felt reports
1
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
4.1mb, body-waveUSGS National Earthquake Information CenterPreferred · Reviewed · ±0.087 · 36 stations
4.1mb, body-waveAlaska Earthquake CenterPreliminary

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

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 1.8 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
163°
Stations used
116

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 32 in the 60 days after this one and 19 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 us1000bv8b (also filed as ak17645060, ak017gefr1v5). Read Thu, Oct 1, 2026, 6:28 AM UTC.