M1.9 Depth: 77.5 km

M1.9 Earthquake near 8 km ESE of Old Harbor, Alaska (United States)

UTC time: 2025-09-03 10:36:55 UTC Local time: —

About this earthquake

On September 3, 2025 at 10:36 UTC, a magnitude M1.9 earthquake occurred near 8 km ESE of Old Harbor, Alaska (United States). At around 78 km, the focal depth places this among intermediate-depth events. Events of this size typically go unnoticed.

The data is provided by USGS and cross-checked across seismological networks. United States: 156 earthquakes were recorded in the past 24 hours, the strongest reaching M5.1.

Details

Magnitude

M1.9

Depth

77.5 km

UTC time

2025-09-03 10:36:55 UTC

Local time

—

Country

United States

City

Alaska

Source

usgs

Coordinates

57.18330, -153.17460

Temperature

14.1°C

Map

Depth profile

Intermediate

77.5 km

77.5 km — deeper than the regional average (15.6 km)

Regional average: 15.6 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

Alaska Peninsula Arc at 155.4°W

Distance: 154 km ·Lava dome ·Elevation: 402 m ·United States
Steller

Distance: 156 km ·Stratovolcano ·Elevation: 2'279 m ·United States
Snowy Mountain

Distance: 156 km ·Stratovolcano(es) ·Elevation: 2'162 m ·Last eruption: 1710 ·United States
Denison

Distance: 157 km ·Stratovolcano ·Elevation: 2'287 m ·United States
Kukak

Distance: 158 km ·Stratovolcano ·Elevation: 2'043 m ·United States
Katmai

Distance: 161 km ·Stratovolcano ·Elevation: 2'047 m ·Last eruption: 1912 ·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)

594

Country (24h)