Alaska earthquakes

M4.5 earthquake 30 km SSW of Unalaska, Alaska

A magnitude 4.5 earthquake struck 30 km SSW of Unalaska, Alaska on Sun, Jul 12, 2026, 3:23 AM AKDT (11:23 UTC), 96 km (60 mi) below the surface.

Unalaska 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: 4.5 (mb, body-wave), light
Magnitude from: USGS National Earthquake Information Center
Local time: Sun, Jul 12, 2026, 3:23 AM AKDT
UTC: 2026-07-12 11:23:48 UTC
Depth: 95.9 km (59.6 mi), intermediate-depth
Epicenter: 53.639° N, 166.773° W
Region: Alaska
Felt reports: 15
Strongest shaking: III, weak shaking
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.	Scale	Computed by	Notes
4.5	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.04 · 188 stations
4.6	ML, local (Richter)	Alaska Earthquake Center	Reviewed · ±0.2 · 85 stations

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: 1.5% of gravity
Peak ground velocity: 0.8 cm/s
Map: Automatic

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

Did you feel it?

15 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 7.0 km horizontally, 4.2 km in depth
Magnitude uncertainty: ±0.04
Depth from: From location
Station coverage gap: 143°
Stations used: 93

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast31 kmSSW

Nearby

Within 100 km, magnitude 1.5 and up: 155 in the 60 days after this one and 106 in the 30 days before it.

After

The first 60 of 155.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000szv2 (also filed as aka2026nrnaaz). Read Thu, Oct 1, 2026, 3:32 AM UTC.