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M1.8 Depth: 41.1 km

M1.8 Earthquake near 26 km SE of Old Harbor, Alaska (United States)

UTC time: 2025-09-03 01:02:19 UTC Local time: —

About this earthquake

A magnitude M1.8 earthquake was recorded near 26 km SE of Old Harbor, Alaska (United States) on September 3, 2025 at 01:02 UTC. With a focal depth of about 41 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. 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
M1.8
Depth
41.1 km
UTC time
2025-09-03 01:02:19 UTC
Local time
—
Country
United States
City
Alaska
Source
usgs
Coordinates
57.03910, -152.97940
Temperature
13.4°C

Map

Depth profile

Depth profile Depth: 41.1 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 41.1 km
Shallow
41.1 km
41.1 km — deeper than the regional average (15.6 km)
Regional average: 15.6 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: 172 km ·Lava dome ·Elevation: 402 m ·United States
  • Steller
    Distance: 176 km ·Stratovolcano ·Elevation: 2'279 m ·United States
  • Snowy Mountain
    Distance: 176 km ·Stratovolcano(es) ·Elevation: 2'162 m ·Last eruption: 1710 ·United States
  • Denison
    Distance: 176 km ·Stratovolcano ·Elevation: 2'287 m ·United States
  • Kukak
    Distance: 177 km ·Stratovolcano ·Elevation: 2'043 m ·United States
  • Katmai
    Distance: 181 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.

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