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United States

M1.1 Earthquake near 53 km ESE of Port Alsworth, Alaska (United States)

UTC time: 2025-04-25 19:39:49 UTC Local time: —
Magnitude
M1.1
Depth
144.5 km
Source
USGS

53 km ESE of Port Alsworth, Alaska

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About this earthquake

A magnitude M1.1 earthquake was recorded near 53 km ESE of Port Alsworth, Alaska (United States) on April 25, 2025 at 19:39 UTC. At around 145 km, the focal depth places this among intermediate-depth events. Events of this size typically go unnoticed.

The data is provided by USGS and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 155 earthquakes, the strongest at M4.0.

Details

ID
2a15a5a3970a4ac23a060538c06fde0182bea0e0
Magnitude
M1.1
Depth
144.5 km
UTC time
2025-04-25 19:39:49 UTC
Local time
—
Country
United States
Source
usgs
Coordinates
60.09990, -153.37840
Temperature
-3.2°C

Depth profile

Depth profile Depth: 144.5 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 144.5 km
Intermediate
144.5 km
144.5 km — deeper than the regional average (15.3 km)
Regional average: 15.3 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

  • Iliamna
    Distance: 18 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • Redoubt
    Distance: 55 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Augustine
    Distance: 82 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·United States
  • Douglas
    Distance: 139 km ·Stratovolcano ·Elevation: 2'140 m ·United States
  • Spurr
    Distance: 147 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
  • Fourpeaked
    Distance: 149 km ·Stratovolcano ·Elevation: 2'105 m ·Last eruption: 2006 ·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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