M3.5 Depth: 7.5 km

M3.5 Earthquake near ALASKA PENINSULA (United States)

UTC time: 2025-10-21 23:46:11 UTC Local time: —

About this earthquake

On October 21, 2025 at 23:46 UTC, a magnitude M3.5 earthquake occurred near ALASKA PENINSULA (United States). With a focal depth of about 8 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. 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 189 earthquakes, the strongest at M4.7.

Details

Magnitude

M3.5

Depth

7.5 km

UTC time

2025-10-21 23:46:11 UTC

Local time

—

Country

United States

City

Alaska

Source

emsc

Coordinates

57.66440, -155.42270

Temperature

3.9°C

Map

Depth profile

Shallow

7.5 km

7.5 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

Alaska Peninsula Arc at 155.4°W

Distance: 23 km ·Lava dome ·Elevation: 402 m ·United States
Martin

Distance: 57 km ·Stratovolcano ·Elevation: 1'863 m ·Last eruption: 1953 ·United States
Ugashik-Peulik

Distance: 57 km ·Stratovolcano ·Elevation: 1'474 m ·Last eruption: 1814 ·United States
Mageik

Distance: 60 km ·Stratovolcano ·Elevation: 2'165 m ·Last eruption: -500 ·United States
Trident

Distance: 66 km ·Stratovolcano ·Elevation: 1'864 m ·Last eruption: 1974 ·United States
Ukinrek Maars

Distance: 68 km ·Maar(s) ·Elevation: 91 m ·Last eruption: 1977 ·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)

596

Country (24h)