Alaska earthquakes

M4.6 earthquake 210 km WSW of Adak, Alaska

A magnitude 4.6 earthquake struck 210 km WSW of Adak, Alaska on Sun, Oct 16, 2022, 5:39 AM HADT (14:39 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.7 Andreanof Islands, Aleutian Islands, Alaska. This one was a foreshock.

Map

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

Open the live map with earthquakes

The earthquake

Magnitude: 4.6 (mb), light
Local time: Sun, Oct 16, 2022, 5:39 AM HADT
UTC: 2022-10-16 14:39:19 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 50.873° N, 179.202° W
Region: Alaska
Strongest shaking: III, 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: III, weak shaking
Peak ground acceleration: 3.1% of gravity
Peak ground velocity: -0.3 cm/s
Map: Automatic

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

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 4.3 km horizontally, 1.8 km in depth
Magnitude uncertainty: ±0.04
Depth from: Operator assigned
Station coverage gap: 95°
Stations used: 122

Nearby

Within 100 km, magnitude 1.6 and up: 113 in the 60 days after this one and 40 in the 30 days before it.

After

The first 60 of 113.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000iu4u (also filed as ak022da6vs05). Read Wed, Sep 30, 2026, 5:13 AM UTC.