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M5.9 Depth: 129.0 km

M5.9 Earthquake near Rat Islands (United States)

UTC time: 2025-08-28 11:07:48 UTC Local time: —

About this earthquake

On August 28, 2025 at 11:07 UTC, a magnitude M5.9 earthquake occurred near Rat Islands (United States). The earthquake originated at an intermediate depth of about 129 km. Earthquakes of this magnitude can damage poorly built structures.

The event was recorded by ISC. United States: 163 earthquakes were recorded in the past 24 hours, the strongest reaching M3.6.

Details

Magnitude
M5.9
Depth
129.0 km
UTC time
2025-08-28 11:07:48 UTC
Local time
—
Country
United States
City
Alaska
Source
isc
Coordinates
52.13000, 179.85000
Temperature
8.6°C

Map

Depth profile

Depth profile Depth: 129 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 129 km
Intermediate
129 km
129 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: 29 km ·Stratovolcano ·Elevation: 1'221 m ·Last eruption: 2023 ·United States
  • Little Sitkin
    Distance: 92 km ·Stratovolcano ·Elevation: 1'174 m ·Last eruption: 1830 ·United States
  • Davidof
    Distance: 105 km ·Stratovolcano ·Elevation: 328 m ·United States
  • Segula
    Distance: 118 km ·Stratovolcano ·Elevation: 1'160 m ·United States
  • Kiska
    Distance: 154 km ·Stratovolcano ·Elevation: 1'220 m ·Last eruption: 1990 ·United States
  • Buldir
    Distance: 269 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 hours3
First 24 hours9
First 72 hours9
Strongest subsequent eventM5.9
M5.52025-08-28 11:07:49 UTC24.4 kmAlaska M5.72025-08-28 11:07:50 UTC2.5 kmEvent of magnitude 5.7, near of Anchorage (Monde) M5.92025-08-28 11:07:50 UTC10.9 kmRat Islands, Aleutian Islands, United States [Sea: United States] M5.22025-08-29 09:14:16 UTC68.8 kmAlaska M5.42025-08-29 09:14:17 UTC34.6 kmRat Islands, Aleutian Islands M5.52025-08-29 09:14:24 UTC60.1 km263 km W of Adak, Alaska M5.52025-08-29 09:14:25 UTC58.9 km264 km W of Adak, Alaska M5.52025-08-29 09:14:25 UTC52.1 km M5.02025-08-29 09:14:26 UTC68.5 kmAlaska M5.02025-09-13 01:58:48 UTC48.6 kmRat Islands, Aleutian Islands M4.52025-09-13 01:58:55 UTC75.5 kmAlaska M4.52025-09-13 01:58:56 UTC70.6 km

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#2
Earlier events M≥424
Earlier events M≥512
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 UTC7.0 kmRat Islands, Aleutian Islands M5.82025-08-28 11:07:47 UTC25.0 kmAlaska M5.42025-07-26 05:03:54 UTC105.0 km M5.42025-07-26 05:03:53 UTC110.1 kmRat Islands, Aleutian Islands, Alaska M5.32025-07-26 23:09:39 UTC108.4 kmRat Islands, Aleutian Islands, Alaska

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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