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United States

M4.0 Earthquake near RAT ISLANDS, ALEUTIAN ISLANDS (United States)

UTC time: 2025-08-22 00:18:32 UTC Local time: —

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About this earthquake

On August 22, 2025 at 00:18 UTC, a magnitude M4.0 earthquake occurred near RAT ISLANDS, ALEUTIAN ISLANDS (United States). With a focal depth of about 37 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Tremors of this size are distinctly felt and can occasionally cause light damage.

The data is provided by EMSC and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 184 earthquakes, the strongest at M3.0.

Details

ID
e3c20e8d66265c7871bc8a7c30788625aeeb3a32
Magnitude
M4.0
Depth
36.5 km
UTC time
2025-08-22 00:18:32 UTC
Local time
—
Country
United States
City
Alaska
Source
emsc
Coordinates
51.17520, 179.21060
Temperature
13.3°C

Depth profile

Depth profile Depth: 36.5 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 36.5 km
Shallow
36.5 km
36.5 km — deeper than the regional average (15.2 km)
Regional average: 15.2 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

  • Semisopochnoi
    Distance: 88 km ·Stratovolcano ·Elevation: 1'221 m ·Last eruption: 2023 ·United States
  • Little Sitkin
    Distance: 98 km ·Stratovolcano ·Elevation: 1'174 m ·Last eruption: 1830 ·United States
  • Davidof
    Distance: 107 km ·Stratovolcano ·Elevation: 328 m ·United States
  • Segula
    Distance: 119 km ·Stratovolcano ·Elevation: 1'160 m ·United States
  • Kiska
    Distance: 152 km ·Stratovolcano ·Elevation: 1'220 m ·Last eruption: 1990 ·United States
  • Buldir
    Distance: 262 km ·Stratovolcano ·Elevation: 656 m ·United States

Alaska

Context for this earthquake

21 Sep 2025 – 21 Sep 2026 · M ≥ 3.0 · 653 Catalogue entries

Sufficiently reliable matching data are not currently available for a direct comparison. The area profile shows the available records and their limitations.

Open seismic profile

Historic earthquake map · United States

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Country statistics · United States

Country overview
View earthquake KPIs, strongest and latest events, and averages for this country.

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