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M2.5 Depth: 17.1 km

M2.5 Earthquake near 95 km E of Chignik, Alaska (United States)

UTC time: 2025-09-18 04:03:58 UTC Local time: —

About this earthquake

On September 18, 2025 at 04:03 UTC, a magnitude M2.5 earthquake occurred near 95 km E of Chignik, Alaska (United States). The hypocenter lay relatively close to the surface at around 17 km, increasing how strongly it was felt. Events of this size typically go unnoticed.

The data is provided by USGS and cross-checked across seismological networks. United States: 171 earthquakes were recorded in the past 24 hours, the strongest reaching M3.7.

Details

Magnitude
M2.5
Depth
17.1 km
UTC time
2025-09-18 04:03:58 UTC
Local time
—
Country
United States
City
Alaska
Source
usgs
Coordinates
56.28400, -156.86340
Temperature
10.6°C

Map

Depth profile

Depth profile Depth: 17.1 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 17.1 km
Shallow
17.1 km
17.1 km — close to the regional average (15.4 km)
Regional average: 15.4 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

  • Yantarni
    Distance: 84 km ·Stratovolcano ·Elevation: 1'345 m ·Last eruption: -800 ·United States
  • Chiginagak
    Distance: 95 km ·Stratovolcano ·Elevation: 2'221 m ·Last eruption: 1998 ·United States
  • Kialagvik
    Distance: 102 km ·Stratovolcano ·Elevation: 1'677 m ·United States
  • Aniakchak
    Distance: 104 km ·Caldera ·Elevation: 1'341 m ·Last eruption: 1931 ·United States
  • Black Peak
    Distance: 122 km ·Stratovolcano ·Elevation: 1'032 m ·Last eruption: -1900 ·United States
  • Veniaminof
    Distance: 156 km ·Stratovolcano ·Elevation: 2'507 m ·Last eruption: 2021 ·United States

Historic earthquake map · United States

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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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