M4.1 Depth: 188.4 km

M4.1 Earthquake near 33 km E of Port Alsworth, Alaska (United States)

UTC time: 2025-10-13 16:51:17 UTC Local time: —

About this earthquake

On October 13, 2025 at 16:51 UTC, a magnitude M4.1 earthquake occurred near 33 km E of Port Alsworth, Alaska (United States). The earthquake originated at an intermediate depth of about 188 km. Tremors of this size are distinctly felt and can occasionally cause light damage.

The event was recorded by USGS. United States: 214 earthquakes were recorded in the past 24 hours, the strongest reaching M5.5.

Details

Magnitude

M4.1

Depth

188.4 km

UTC time

2025-10-13 16:51:17 UTC

Local time

—

Country

United States

City

Alaska

Source

usgs

Coordinates

60.19790, -153.70650

Temperature

1.8°C

Map

Depth profile

Intermediate

188.4 km

188.4 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: 39 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
Redoubt

Distance: 62 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: 146 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
Douglas

Distance: 150 km ·Stratovolcano ·Elevation: 2'140 m ·United States
Fourpeaked

Distance: 159 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)

631

Country (24h)