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M5.5 Depth: 120.0 km

M5.5 Earthquake near RAT ISLANDS, ALEUTIAN ISLANDS (United States)

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

About this earthquake

A magnitude M5.5 earthquake was recorded near RAT ISLANDS, ALEUTIAN ISLANDS (United States) on December 13, 2025 at 10:51 UTC. The earthquake originated at an intermediate depth of about 120 km. Events of this size can cause damage near the epicenter.

The data is provided by EMSC and cross-checked across seismological networks. United States: 154 earthquakes were recorded in the past 24 hours, the strongest reaching M3.6.

Details

Magnitude
M5.5
Depth
120.0 km
UTC time
2025-12-13 10:51:00 UTC
Local time
—
Country
United States
City
Alaska
Source
emsc
Coordinates
52.02000, 178.38000
Temperature
3.8°C

Map

Depth profile

Depth profile Depth: 120 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 120 km
Intermediate
120 km
120 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: 7 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: 83 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≥447
Earlier events M≥530
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 UTC100.1 kmRat Islands, Aleutian Islands M5.92025-08-28 11:07:50 UTC109.6 kmRat Islands, Aleutian Islands, United States [Sea: United States] M5.92025-08-28 11:07:48 UTC101.4 km241 km W of Adak, Alaska M5.92025-08-28 11:07:48 UTC106.1 km M5.92025-08-28 11:07:48 UTC101.2 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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