Alaska earthquakes

M3.5 earthquake 8 km SW of Susitna, Alaska

A magnitude 3.5 earthquake struck 8 km SW of Susitna, Alaska on Mon, Dec 9, 2019, 1:07 AM AKST (10:07 UTC), 57 km (36 mi) below the surface.

A larger quake followed: M4.1 15 km SSE of Susitna, Alaska. This one was a foreshock.

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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: 3.5 (ml), minor
Local time: Mon, Dec 9, 2019, 1:07 AM AKST
UTC: 2019-12-09 10:07:57 UTC
Depth: 57.4 km (35.7 mi), shallow
Epicenter: 61.486° N, 150.615° W
Region: Alaska
Felt reports: 11
Strongest shaking: II, weak shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: II, weak shaking
Peak ground acceleration: 0.2% of gravity
Peak ground velocity: -2.7 cm/s
Map: Automatic

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

Did you feel it?

11 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.

Stations used: 178

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 159 in the 30 days before it.

After

The first 60 of at least 199.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak019frfbzvw (also filed as us60006p6b). Read Wed, Sep 30, 2026, 5:46 PM UTC.