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M5.5 Depth: 109.6 km

M5.5 Earthquake near Rat Islands, Aleutian Islands, Alaska (United States)

UTC time: 2025-12-13 10:51:00 UTC Local time: —

About this earthquake

On December 13, 2025 at 10:51 UTC, a magnitude M5.5 earthquake occurred near Rat Islands, Aleutian Islands, Alaska (United States). The earthquake originated at an intermediate depth of about 110 km. Earthquakes of this magnitude can damage poorly built structures.

The event was recorded by USGS. United States: 154 earthquakes were recorded in the past 24 hours, the strongest reaching M3.6.

Details

Magnitude
M5.5
Depth
109.6 km
UTC time
2025-12-13 10:51:00 UTC
Local time
—
Country
United States
City
Alaska
Source
usgs
Coordinates
51.92340, 178.33730
Temperature
3.8°C

Map

Depth profile

Depth profile Depth: 109.6 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 109.6 km
Intermediate
109.6 km
109.6 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

  • Davidof
    Distance: 5 km ·Stratovolcano ·Elevation: 328 m ·United States
  • Little Sitkin
    Distance: 14 km ·Stratovolcano ·Elevation: 1'174 m ·Last eruption: 1830 ·United States
  • Segula
    Distance: 17 km ·Stratovolcano ·Elevation: 1'160 m ·United States
  • Kiska
    Distance: 54 km ·Stratovolcano ·Elevation: 1'220 m ·Last eruption: 1990 ·United States
  • Semisopochnoi
    Distance: 85 km ·Stratovolcano ·Elevation: 1'221 m ·Last eruption: 2023 ·United States
  • Buldir
    Distance: 172 km ·Stratovolcano ·Elevation: 656 m ·United States

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#10
Earlier events M≥448
Earlier events M≥531
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 UTC105.6 kmRat Islands, Aleutian Islands M5.92025-08-28 11:07:50 UTC113.8 kmRat Islands, Aleutian Islands, United States [Sea: United States] M5.92025-08-28 11:07:48 UTC104.7 km241 km W of Adak, Alaska M5.92025-08-28 11:07:48 UTC111.8 km M5.92025-08-28 11:07:48 UTC106.0 kmRat Islands

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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