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M3.1 Earthquake near 39 km SE of Fox River, Alaska (United States)

UTC time: 2025-10-31 09:37:13 UTC Local time: —

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About this earthquake

A magnitude M3.1 earthquake was recorded near 39 km SE of Fox River, Alaska (United States) on October 31, 2025 at 09:37 UTC. The hypocenter lay relatively close to the surface at around 21 km, increasing how strongly it was felt. Earthquakes of this magnitude are often felt but rarely cause damage.

The data is provided by USGS and cross-checked across seismological networks. United States: 192 earthquakes were recorded in the past 24 hours, the strongest reaching M4.0.

Details

ID
c687256ba2c3ee898e45e0a39af60e18bf17f1be
Magnitude
M3.1
Depth
20.6 km
UTC time
2025-10-31 09:37:13 UTC
Local time
—
Country
United States
City
Alaska
Source
usgs
Coordinates
59.65900, -150.38710
Temperature
6.4°C

Depth profile

Depth profile Depth: 20.6 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 20.6 km
Shallow
20.6 km
20.6 km — deeper than the regional average (15.2 km)
Regional average: 15.2 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

  • Iliamna
    Distance: 157 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • Redoubt
    Distance: 160 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Augustine
    Distance: 175 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·United States
  • Douglas
    Distance: 200 km ·Stratovolcano ·Elevation: 2'140 m ·United States
  • Spurr
    Distance: 209 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
  • Fourpeaked
    Distance: 211 km ·Stratovolcano ·Elevation: 2'105 m ·Last eruption: 2006 ·United States

Alaska

Context for this earthquake

22 Sep 2025 – 22 Sep 2026 · M ≥ 3.0 · 656 Catalogue entries

Of 655 other entries for this area and period, 469 have a higher stored magnitude. Different magnitude types and reports not yet merged limit the comparison.

Open seismic profile

Historic earthquake map · United States

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