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M3.1 Depth: 121.3 km

M3.1 Earthquake near 55 km WSW of Skwentna, Alaska (United States)

UTC time: 2025-08-18 02:21:00 UTC Local time: —

About this earthquake

A magnitude M3.1 earthquake was recorded near 55 km WSW of Skwentna, Alaska (United States) on August 18, 2025 at 02:21 UTC. The earthquake originated at an intermediate depth of about 121 km. Earthquakes of this magnitude are often felt but rarely cause damage.

The event was recorded by USGS. United States: 228 earthquakes were recorded in the past 24 hours, the strongest reaching M3.9.

Details

Magnitude
M3.1
Depth
121.3 km
UTC time
2025-08-18 02:21:00 UTC
Local time
—
Country
United States
City
Alaska
Source
usgs
Coordinates
61.73500, -152.29890
Temperature
0.0°C

Map

Depth profile

Depth profile Depth: 121.3 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 121.3 km
Intermediate
121.3 km
121.3 km — deeper than the regional average (15.4 km)
Regional average: 15.4 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

  • Hayes
    Distance: 12 km ·Stratovolcano ·Elevation: 3'034 m ·Last eruption: 1200 ·United States
  • Spurr
    Distance: 49 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
  • Redoubt
    Distance: 141 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Iliamna
    Distance: 194 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • Augustine
    Distance: 271 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·United States
  • Buzzard Creek
    Distance: 324 km ·Tuff ring(s) ·Elevation: 830 m ·Last eruption: -1050 ·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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