M3.1 Depth: 10.0 km

M3.1 Earthquake near SOUTHERN ALASKA (United States)

UTC time: 2025-09-21 16:54:57 UTC Local time: —

About this earthquake

On September 21, 2025 at 16:54 UTC, a magnitude M3.1 earthquake occurred near SOUTHERN ALASKA (United States). The hypocenter lay relatively close to the surface at around 10 km, increasing how strongly it was felt. Earthquakes of this magnitude are often felt but rarely cause damage.

The event was recorded by EMSC. United States: 162 earthquakes were recorded in the past 24 hours, the strongest reaching M3.7.

Details

Magnitude

M3.1

Depth

10.0 km

UTC time

2025-09-21 16:54:57 UTC

Local time

—

Country

United States

City

Alaska

Source

emsc

Coordinates

60.48650, -143.47050

Temperature

3.8°C

Map

Depth profile

Shallow

10 km

10 km — shallower than the regional average (15.4 km)

Regional average: 15.4 km

Why depth matters

Shallow quakes release energy near the surface — shaking is felt more strongly and damage potential is higher.

Depth classes per USGS

Volcanoes nearby

Churchill

Distance: 136 km ·Stratovolcano ·Elevation: 5'005 m ·Last eruption: 847 ·United States
Wrangell

Distance: 171 km ·Shield ·Elevation: 4'278 m ·Last eruption: 1912 ·United States
Fort Selkirk

Distance: 420 km ·Volcanic field ·Elevation: 1'239 m ·Canada
Alligator Lake

Distance: 441 km ·Volcanic field ·Elevation: 2'217 m ·Canada
Buzzard Creek

Distance: 473 km ·Tuff ring(s) ·Elevation: 830 m ·Last eruption: -1050 ·United States
Spurr

Distance: 483 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States

Historic earthquake map · United States

Open history map

Explore recent and long-term earthquake activity in this country. Use filters to narrow down by magnitude, depth, and date range.

Country statistics · United States

Country overview

View earthquake KPIs, strongest and latest events, and averages for this country.

Stats (last 24h)

Global (24h)

1052

Country (24h)