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M5.9 Depth: 135.9 km

M5.9 Earthquake near Rat Islands, Aleutian Islands, United States [Sea: United States] (United States)

UTC time: 2025-08-28 11:07:50 UTC Local time: —

About this earthquake

A magnitude M5.9 earthquake was recorded near Rat Islands, Aleutian Islands, United States [Sea: United States] (United States) on August 28, 2025 at 11:07 UTC. At around 136 km, the focal depth places this among intermediate-depth events. Earthquakes of this magnitude can damage poorly built structures.

The data is provided by INGV and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 155 earthquakes, the strongest at M3.6.

Details

Magnitude
M5.9
Depth
135.9 km
UTC time
2025-08-28 11:07:50 UTC
Local time
—
Country
United States
City
Alaska
Source
ingv
Coordinates
52.07340, 179.98100
Temperature
8.6°C

Map

Depth profile

Depth profile Depth: 135.9 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 135.9 km
Intermediate
135.9 km
135.9 km — deeper than the regional average (15.9 km)
Regional average: 15.9 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

  • Semisopochnoi
    Distance: 32 km ·Stratovolcano ·Elevation: 1'221 m ·Last eruption: 2023 ·United States
  • Little Sitkin
    Distance: 99 km ·Stratovolcano ·Elevation: 1'174 m ·Last eruption: 1830 ·United States
  • Davidof
    Distance: 114 km ·Stratovolcano ·Elevation: 328 m ·United States
  • Segula
    Distance: 126 km ·Stratovolcano ·Elevation: 1'160 m ·United States
  • Kiska
    Distance: 163 km ·Stratovolcano ·Elevation: 1'220 m ·Last eruption: 1990 ·United States
  • Buldir
    Distance: 279 km ·Stratovolcano ·Elevation: 656 m ·United States

Subsequent earthquakes nearby

Events recorded after this earthquake within 150 km. They are not automatically classified as aftershocks.

First 6 hours0
First 24 hours6
First 72 hours6
Strongest subsequent eventM5.5
M5.22025-08-29 09:14:16 UTC65.7 kmAlaska M5.42025-08-29 09:14:17 UTC36.5 kmRat Islands, Aleutian Islands M5.52025-08-29 09:14:24 UTC57.8 km263 km W of Adak, Alaska M5.52025-08-29 09:14:25 UTC57.0 km264 km W of Adak, Alaska M5.52025-08-29 09:14:25 UTC50.6 km M5.02025-08-29 09:14:26 UTC65.8 kmAlaska M5.02025-09-13 01:58:48 UTC48.3 kmRat Islands, Aleutian Islands M4.52025-09-13 01:58:55 UTC72.0 kmAlaska M4.52025-09-13 01:58:56 UTC66.9 km M4.52025-09-16 19:10:30 UTC132.2 kmRat Islands, Aleutian Islands, Alaska M3.22025-09-17 01:13:38 UTC67.1 km230 km WSW of Adak, Alaska M3.02025-09-17 01:13:38 UTC59.9 km

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#2
Earlier events M≥428
Earlier events M≥516
Compared since2025-01-30

The QuakeMap24 comparison dataset begins on 2024-03-23. Earlier earthquakes may not be included.

Strongest earlier events

M6.12025-08-28 11:07:35 UTC17.0 kmRat Islands, Aleutian Islands M5.92025-08-28 11:07:48 UTC11.6 km241 km W of Adak, Alaska M5.92025-08-28 11:07:48 UTC17.2 km M5.92025-08-28 11:07:48 UTC10.9 kmRat Islands M5.82025-08-28 11:07:47 UTC18.9 kmAlaska

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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