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United States

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

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

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

Details

ID
b56b9fe35d062c84980d54753f4704ee788c85bc
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

Depth profile

Depth profile Depth: 77.5 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 77.5 km
Intermediate
77.5 km
77.5 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

  • 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

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Old Harbor AirportUnited States · OLH
    6.9 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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