Alaska earthquakes

M4.1 earthquake 89 km SSW of Sand Point, Alaska

A magnitude 4.1 earthquake struck 89 km SSW of Sand Point, Alaska on Thu, Nov 15, 2018, 9:40 PM AKST (06:40 UTC), 32 km (20 mi) below the surface.

A larger quake followed: M6.0 87 km SE of King Cove, Alaska. This one was a foreshock.

Sand Point 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: 4.1 (mwr), light
Local time: Thu, Nov 15, 2018, 9:40 PM AKST
UTC: 2018-11-16 06:40:10 UTC
Depth: 31.6 km (19.6 mi), shallow
Epicenter: 54.565° N, 160.893° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Reverse (thrust)
Moment magnitude: 4.1 Mwr
Nodal plane 1: Strike 67°, dip 67°, rake 101°
Nodal plane 2: Strike 221°, dip 26°, rake 66°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 3.0 km horizontally, 5.0 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 161°
Stations used: 117

Nearest places

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

Sand Point, AlaskaPopulation 1,064. Forecast89 kmSSW

Nearby

Within 100 km, magnitude 1.5 and up: 79 in the 60 days after this one and 28 in the 30 days before it.

After

The first 60 of 79.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000hska (also filed as ak20364801, ak018epbs91h, aacse018epbs91h). Read Tue, Sep 29, 2026, 10:44 PM UTC.