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M1.8 Earthquake near 53 km E of Port Alsworth, Alaska (United States)

UTC time: 2025-04-25 16:24:47 UTC Local time: —
Magnitude
M1.8
Depth
140.3 km
Source
USGS

53 km E of Port Alsworth, Alaska

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About this earthquake

A magnitude M1.8 earthquake was recorded near 53 km E of Port Alsworth, Alaska (United States) on April 25, 2025 at 16:24 UTC. The earthquake originated at an intermediate depth of about 140 km. Events of this size typically go unnoticed.

The event was recorded by USGS. United States: over the past 24 hours, QuakeMap24 logged 155 earthquakes, the strongest at M4.0.

Details

ID
05dee9379118f7d2161fce245d1da57ce2320436
Magnitude
M1.8
Depth
140.3 km
UTC time
2025-04-25 16:24:47 UTC
Local time
—
Country
United States
Source
usgs
Coordinates
60.16460, -153.34990
Temperature
-3.0°C

Depth profile

Depth profile Depth: 140.3 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 140.3 km
Intermediate
140.3 km
140.3 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: 21 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • Redoubt
    Distance: 49 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Augustine
    Distance: 89 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·United States
  • Spurr
    Distance: 140 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
  • Douglas
    Distance: 146 km ·Stratovolcano ·Elevation: 2'140 m ·United States
  • Fourpeaked
    Distance: 156 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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