M4.0 Depth: 72.8 km

M4.0 Earthquake near Rat Islands, Aleutian Islands, Alaska (United States)

UTC time: 2025-05-23 04:38:38 UTC Local time: —

About this earthquake

A magnitude M4.0 earthquake was recorded near Rat Islands, Aleutian Islands, Alaska (United States) on May 23, 2025 at 04:38 UTC. At around 73 km, the focal depth places this among intermediate-depth events. Earthquakes of this magnitude are clearly felt; minor damage to vulnerable buildings is possible.

The data is provided by USGS and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 166 earthquakes, the strongest at M3.6.

Details

Magnitude

M4.0

Depth

72.8 km

UTC time

2025-05-23 04:38:38 UTC

Local time

—

Country

United States

City

Alaska

Source

usgs

Coordinates

51.64160, 178.44590

Temperature

5.9°C

Map

Depth profile

Intermediate

72.8 km

72.8 km — deeper than the regional average (15.3 km)

Regional average: 15.3 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

Little Sitkin

Distance: 35 km ·Stratovolcano ·Elevation: 1'174 m ·Last eruption: 1830 ·United States
Davidof

Distance: 37 km ·Stratovolcano ·Elevation: 328 m ·United States
Segula

Distance: 47 km ·Stratovolcano ·Elevation: 1'160 m ·United States
Kiska

Distance: 77 km ·Stratovolcano ·Elevation: 1'220 m ·Last eruption: 1990 ·United States
Semisopochnoi

Distance: 84 km ·Stratovolcano ·Elevation: 1'221 m ·Last eruption: 2023 ·United States
Buldir

Distance: 191 km ·Stratovolcano ·Elevation: 656 m ·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)

603

Country (24h)