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United States

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

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

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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: 158 earthquakes were recorded in the past 24 hours, the strongest reaching M3.3.

Details

ID
8af3c3b3ccd639fc528892f4ffc6c082d76f131b
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

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 (15.3 km)
Regional average: 15.3 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

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Old Harbor AirportUnited States · OLH
    26.5 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-09-07

This selection shows geographic proximity, not a hazard zone or confirmed impacts. Distances use recorded site coordinates. Sources & data dates

Alaska

Context for this earthquake

07 Sep 2025 – 07 Sep 2026 · M ≥ 2.0 · 4,083 Catalogue entries

Sufficiently reliable matching data are not currently available for a direct comparison. The area profile shows the available records and their limitations.

Open seismic profile

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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