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M3.1 Depth: 96.0 km

M3.1 Earthquake near Southern Alaska (United States)

UTC time: 2025-12-20 20:57:31 UTC Local time: —

About this earthquake

On December 20, 2025 at 20:57 UTC, a magnitude M3.1 earthquake occurred near Southern Alaska (United States). The earthquake originated at an intermediate depth of about 96 km. Shaking of this size is frequently noticed but usually harmless.

The event was recorded by ISC. United States: 234 earthquakes were recorded in the past 24 hours, the strongest reaching M6.0.

Details

Magnitude
M3.1
Depth
96.0 km
UTC time
2025-12-20 20:57:31 UTC
Local time
—
Country
United States
City
Alaska
Source
isc
Coordinates
59.63300, -152.86400
Temperature
-4.9°C

Map

Depth profile

Depth profile Depth: 96 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 96 km
Intermediate
96 km
96 km — deeper than the regional average (15.7 km)
Regional average: 15.7 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

  • Augustine
    Distance: 44 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·United States
  • Iliamna
    Distance: 46 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • Douglas
    Distance: 95 km ·Stratovolcano ·Elevation: 2'140 m ·United States
  • Redoubt
    Distance: 95 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Fourpeaked
    Distance: 106 km ·Stratovolcano ·Elevation: 2'105 m ·Last eruption: 2006 ·United States
  • Kaguyak
    Distance: 131 km ·Lava dome(s) ·Elevation: 901 m ·Last eruption: -3850 ·United States

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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