M2.1 Depth: 145.2 km

M2.1 Earthquake near 57 km E of Port Alsworth, Alaska (United States)

UTC time: 2025-09-28 20:37:12 UTC Local time: —

About this earthquake

On September 28, 2025 at 20:37 UTC, a magnitude M2.1 earthquake occurred near 57 km E of Port Alsworth, Alaska (United States). At around 145 km, the focal depth places this among intermediate-depth events. Events of this size typically go unnoticed.

The event was recorded by USGS. United States: 174 earthquakes were recorded in the past 24 hours, the strongest reaching M3.4.

Details

Magnitude

M2.1

Depth

145.2 km

UTC time

2025-09-28 20:37:12 UTC

Local time

—

Country

United States

City

Alaska

Source

usgs

Coordinates

60.16870, -153.27600

Temperature

2.3°C

Map

Depth profile

Intermediate

145.2 km

145.2 km — deeper than the regional average (15.4 km)

Regional average: 15.4 km

Why depth matters

Intermediate-depth quakes are felt across a wider area but usually cause less surface damage.

Depth classes per USGS

Volcanoes nearby

Iliamna

Distance: 18 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
Redoubt

Distance: 46 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
Augustine

Distance: 90 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·United States
Spurr

Distance: 137 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
Douglas

Distance: 147 km ·Stratovolcano ·Elevation: 2'140 m ·United States
Fourpeaked

Distance: 157 km ·Stratovolcano ·Elevation: 2'105 m ·Last eruption: 2006 ·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)

1027

Country (24h)