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M3.1 Depth: 48.0 km

M3.1 Earthquake near SOUTHERN ALASKA (United States)

UTC time: 2025-07-31 03:00:10 UTC Local time: —

About this earthquake

On July 31, 2025 at 03:00 UTC, a magnitude M3.1 earthquake occurred near SOUTHERN ALASKA (United States). With a focal depth of about 48 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Earthquakes of this magnitude are often felt but rarely cause damage.

The event was recorded by EMSC. United States: over the past 24 hours, QuakeMap24 logged 249 earthquakes, the strongest at M4.1.

Details

Magnitude
M3.1
Depth
48.0 km
UTC time
2025-07-31 03:00:10 UTC
Local time
—
Country
United States
City
Alaska
Source
emsc
Coordinates
61.28200, -150.15230
Temperature
14.2°C

Map

Depth profile

Depth profile Depth: 48 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 48 km
Shallow
48 km
48 km — deeper than the regional average (15.3 km)
Regional average: 15.3 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

  • Spurr
    Distance: 112 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
  • Hayes
    Distance: 126 km ·Stratovolcano ·Elevation: 3'034 m ·Last eruption: 1200 ·United States
  • Redoubt
    Distance: 166 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Iliamna
    Distance: 212 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • Augustine
    Distance: 280 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·United States
  • Buzzard Creek
    Distance: 321 km ·Tuff ring(s) ·Elevation: 830 m ·Last eruption: -1050 ·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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