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M1.3 Depth: 8.1 km

M1.3 Earthquake near 3 km S of Unalaska, Alaska (United States)

UTC time: 2025-07-20 21:35:50 UTC Local time: —

About this earthquake

On July 20, 2025 at 21:35 UTC, a magnitude M1.3 earthquake occurred near 3 km S of Unalaska, Alaska (United States). With a focal depth of about 8 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Earthquakes of this small magnitude are usually barely noticeable and cause no damage.

The data is provided by USGS and cross-checked across seismological networks. United States: 210 earthquakes were recorded in the past 24 hours, the strongest reaching M3.2.

Details

Magnitude
M1.3
Depth
8.1 km
UTC time
2025-07-20 21:35:50 UTC
Local time
—
Country
United States
City
Alaska
Source
usgs
Coordinates
53.84700, -166.53290
Temperature
13.6°C

Map

Depth profile

Depth profile Depth: 8.1 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 8.1 km
Shallow
8.1 km
8.1 km — shallower 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

  • Makushin
    Distance: 26 km ·Stratovolcano ·Elevation: 1'800 m ·Last eruption: 1995 ·United States
  • Akutan
    Distance: 48 km ·Stratovolcano ·Elevation: 1'303 m ·Last eruption: 1992 ·United States
  • Bogoslof
    Distance: 99 km ·Stratovolcano ·Elevation: 150 m ·Last eruption: 2017 ·United States
  • Okmok
    Distance: 115 km ·Shield ·Elevation: 1'073 m ·Last eruption: 2008 ·United States
  • Westdahl
    Distance: 143 km ·Stratovolcano? ·Elevation: 1'563 m ·Last eruption: 1992 ·United States
  • Recheschnoi
    Distance: 153 km ·Stratovolcano ·Elevation: 1'984 m ·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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