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M3.9 Depth: 50.7 km

M3.9 Earthquake near ANDREANOF ISLANDS, ALEUTIAN IS. (United States)

UTC time: 2025-08-28 17:59:59 UTC Local time: —

About this earthquake

On August 28, 2025 at 17:59 UTC, a magnitude M3.9 earthquake occurred near ANDREANOF ISLANDS, ALEUTIAN IS. (United States). The hypocenter lay relatively close to the surface at around 51 km, increasing how strongly it was felt. Earthquakes of this magnitude are often felt but rarely cause damage.

The data is provided by EMSC and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 233 earthquakes, the strongest at M3.9.

Details

Magnitude
M3.9
Depth
50.7 km
UTC time
2025-08-28 17:59:59 UTC
Local time
—
Country
United States
City
Alaska
Source
emsc
Coordinates
51.98800, -172.72990
Temperature
9.5°C

Map

Depth profile

Depth profile Depth: 50.7 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 50.7 km
Shallow
50.7 km
50.7 km — deeper than the regional average (15.4 km)
Regional average: 15.4 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

  • Seguam
    Distance: 39 km ·Stratovolcano(es) ·Elevation: 1'054 m ·Last eruption: 1993 ·United States
  • Atka Volcanic Complex
    Distance: 103 km ·Stratovolcano(es) ·Elevation: 1'518 m ·Last eruption: 2025 ·United States
  • Amukta
    Distance: 116 km ·Stratovolcano ·Elevation: 1'066 m ·Last eruption: 1996 ·United States
  • Chagulak
    Distance: 126 km ·Stratovolcano ·Elevation: 1'028 m ·United States
  • Yunaska
    Distance: 160 km ·Shield ·Elevation: 550 m ·Last eruption: 1937 ·United States
  • Koniuji
    Distance: 166 km ·Stratovolcano ·Elevation: 273 m ·Last eruption: -1150 ·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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