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M3.1 Depth: 56.7 km

M3.1 Earthquake near 68 km S of Akhiok, Alaska (United States)

UTC time: 2025-10-21 19:26:52 UTC Local time: —

About this earthquake

On October 21, 2025 at 19:26 UTC, a magnitude M3.1 earthquake occurred near 68 km S of Akhiok, Alaska (United States). The hypocenter lay relatively close to the surface at around 57 km, increasing how strongly it was felt. Shaking of this size is frequently noticed but usually harmless.

The data is provided by USGS and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 187 earthquakes, the strongest at M4.7.

Details

Magnitude
M3.1
Depth
56.7 km
UTC time
2025-10-21 19:26:52 UTC
Local time
—
Country
United States
City
Alaska
Source
usgs
Coordinates
56.33260, -154.14420
Temperature
8.2°C

Map

Depth profile

Depth profile Depth: 56.7 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 56.7 km
Shallow
56.7 km
56.7 km — deeper than 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

  • Kialagvik
    Distance: 186 km ·Stratovolcano ·Elevation: 1'677 m ·United States
  • Alaska Peninsula Arc at 155.4°W
    Distance: 187 km ·Lava dome ·Elevation: 402 m ·United States
  • Chiginagak
    Distance: 195 km ·Stratovolcano ·Elevation: 2'221 m ·Last eruption: 1998 ·United States
  • Yantarni
    Distance: 201 km ·Stratovolcano ·Elevation: 1'345 m ·Last eruption: -800 ·United States
  • Ugashik-Peulik
    Distance: 207 km ·Stratovolcano ·Elevation: 1'474 m ·Last eruption: 1814 ·United States
  • Martin
    Distance: 217 km ·Stratovolcano ·Elevation: 1'863 m ·Last eruption: 1953 ·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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