M3.5 Depth: 128.4 km

M3.5 Earthquake near SOUTHERN ALASKA (United States)

UTC time: 2025-09-20 01:36:13 UTC Local time: —

About this earthquake

A magnitude M3.5 earthquake was recorded near SOUTHERN ALASKA (United States) on September 20, 2025 at 01:36 UTC. At around 128 km, the focal depth places this among intermediate-depth events. Shaking of this size is frequently noticed but usually harmless.

The event was recorded by EMSC. United States: over the past 24 hours, QuakeMap24 logged 175 earthquakes, the strongest at M3.5.

Details

Magnitude

M3.5

Depth

128.4 km

UTC time

2025-09-20 01:36:13 UTC

Local time

—

Country

United States

City

Alaska

Source

emsc

Coordinates

60.17640, -152.95990

Temperature

3.0°C

Map

Depth profile

Intermediate

128.4 km

128.4 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: 36 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
Augustine

Distance: 94 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·United States
Spurr

Distance: 131 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
Douglas

Distance: 151 km ·Stratovolcano ·Elevation: 2'140 m ·United States
Fourpeaked

Distance: 161 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)

1029

Country (24h)