Alaska earthquakes

M5.0 earthquake 59 km N of Karluk, Alaska

A magnitude 5.0 earthquake struck 59 km N of Karluk, Alaska on Sun, Jun 18, 2023, 1:14 AM AKDT (09:14 UTC), 84 km (52 mi) below the surface.

Womens Bay forecast More in Alaska

Map

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

Open the live map with earthquakes

The earthquake

Magnitude: 5.0 (Mww, W-phase moment), moderate
Magnitude from: Alaska Earthquake Center
Local time: Sun, Jun 18, 2023, 1:14 AM AKDT
UTC: 2023-06-18 09:14:31 UTC
Depth: 84.2 km (52.3 mi), intermediate-depth
Epicenter: 58.102° N, 154.603° W
Region: Alaska
Felt reports: 66
Strongest shaking: IV, light shaking
Tsunami flag: Yes: a large quake in an oceanic region
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.	Scale	Computed by	Notes
5.0	Mww, W-phase moment	Alaska Earthquake Center	Preferred · Preliminary
5.0	Mww, W-phase moment	USGS National Earthquake Information Center	Reviewed · ±0.036 · 76 stations
5.0	ML, local (Richter)	NOAA National Tsunami Warning Center	Reviewed · 39 stations
5.0	Mwr, regional moment	USGS National Earthquake Information Center	Moment tensor · Reviewed

Tsunami

The USGS flags a quake this large in an oceanic region. The flag does not mean a tsunami happened; the tsunami warning centers decide that, and their messages are below when they issued any.

Current tsunami warnings: tsunami.gov. Warnings in force in the US also appear on our alerts pages.

Shaking

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

Strongest estimated: IV, light shaking
Peak ground acceleration: 1.4% of gravity
Peak ground velocity: -1.1 cm/s
Map: Automatic

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

Did you feel it?

66 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.

Fault motion and ground failure

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

Faulting: Strike-slip
Moment magnitude: 5.0 Mww
Nodal plane 1: Strike 343°, dip 56°, rake 154°
Nodal plane 2: Strike 88°, dip 68°, rake 37°

How well it is located

Reviewed by a seismologist.

Stations used: 223

Nearest places

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

Nearby

Within 100 km, magnitude 2.0 and up: 104 in the 60 days after this one and 39 in the 30 days before it.

After

The first 60 of 104.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0237rn9mb0 (also filed as at00rwfz06, us7000k9bv). Read Sat, Oct 3, 2026, 4:25 AM UTC.