Alaska earthquakes

M5.0 earthquake 212 km WSW of Adak, Alaska

A magnitude 5.0 earthquake struck 212 km WSW of Adak, Alaska on Thu, Jun 18, 2026, 4:58 AM HADT (13:58 UTC), 31 km (20 mi) below the surface.

Map

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

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The earthquake

Magnitude: 5.0 (mb), moderate
Local time: Thu, Jun 18, 2026, 4:58 AM HADT
UTC: 2026-06-18 13:58:27 UTC
Depth: 31.5 km (19.6 mi), shallow
Epicenter: 51.292° N, 179.555° W
Region: Alaska
Strongest shaking: IV, light shaking
PAGER alert: Green
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: IV, light shaking
Peak ground acceleration: 1.7% of gravity
Peak ground velocity: 0.9 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.

Estimated impact

The USGS PAGER system estimates deaths and economic losses from the shaking and the population and buildings exposed to it.

Alert level: Green: little or no damage or loss of life expected

Deaths: estimated chance of each range
Range	Chance
Under 1	95%
1 to 10	5%
10 to 100	Under 1%
100 to 1,000	Under 1%
1,000 to 10,000	Under 1%
10,000 to 100,000	Under 1%
100,000 to 10,000,000	Under 1%

Economic losses: estimated chance of each range
Range, million USD	Chance
Under 1	90%
1 to 10	9%
10 to 100	Under 1%
100 to 1,000	Under 1%
1,000 to 10,000	Under 1%
10,000 to 100,000	Under 1%
100,000 to 10,000,000	Under 1%

Aftershock forecast

The chance of at least one aftershock this large or larger, from the USGS operational aftershock forecast, issued Thu, Sep 24, 2026, 1:58 PM UTC. The USGS updates it as the sequence unfolds.

Within	M3+	M4+	M5+	M6+	M7+
1 day	Under 1%	Under 1%	Under 1%	Under 1%	Under 1%
1 week	2%	Under 1%	Under 1%	Under 1%	Under 1%
1 month	7%	Under 1%	Under 1%	Under 1%	Under 1%
1 year	31%	4%	Under 1%	Under 1%	Under 1%

In the coming week the USGS expects about 0 aftershocks of magnitude 3 or more, and most likely between 0 and 0.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 3.9 km horizontally, 4.5 km in depth
Magnitude uncertainty: ±0.03
Depth from: From location
Station coverage gap: 82°
Stations used: 69

Nearby

Within 100 km, magnitude 2.0 and up: 167 in the 60 days after this one and 70 in the 30 days before it.

After

The first 60 of 167.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000subg (also filed as aka2026lzjqmm). Read Wed, Sep 30, 2026, 10:32 PM UTC.