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M5.5 Depth: 50.0 km

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

UTC time: 2025-11-23 08:21:46 UTC Local time: —

About this earthquake

A magnitude M5.5 earthquake was recorded near Andreanof Islands, Aleutian Islands (United States) on November 23, 2025 at 08:21 UTC. The hypocenter lay relatively close to the surface at around 50 km, increasing how strongly it was felt. Events of this size can cause damage near the epicenter.

The event was recorded by GFZ. United States: 156 earthquakes were recorded in the past 24 hours, the strongest reaching M3.8.

Details

Magnitude
M5.5
Depth
50.0 km
UTC time
2025-11-23 08:21:46 UTC
Local time
—
Country
United States
City
Alaska
Source
gfz
Coordinates
51.53000, -177.15000
Temperature
5.4°C

Map

Depth profile

Depth profile Depth: 50 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 50 km
Shallow
50 km
50 km — deeper than the regional average (15.9 km)
Regional average: 15.9 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

  • Kanaga
    Distance: 44 km ·Stratovolcano ·Elevation: 1'307 m ·Last eruption: 2023 ·United States
  • Bobrof
    Distance: 47 km ·Stratovolcano ·Elevation: 738 m ·United States
  • Moffett
    Distance: 54 km ·Stratovolcano ·Elevation: 1'196 m ·Last eruption: -1600 ·United States
  • Takawangha
    Distance: 70 km ·Stratovolcano ·Elevation: 1'449 m ·Last eruption: 1550 ·United States
  • Tanaga
    Distance: 79 km ·Stratovolcano(es) ·Elevation: 1'806 m ·Last eruption: 1914 ·United States
  • Great Sitkin WATCH · ORANGE
    Distance: 93 km ·Stratovolcano ·Elevation: 1'740 m ·Last eruption: 2026 ·United States

Subsequent earthquakes nearby

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

First 6 hours1
First 24 hours1
First 72 hours1
Strongest subsequent eventM5.3
M4.02025-11-23 10:44:13 UTC16.5 km M4.22025-11-28 04:32:53 UTC97.7 km143 km WSW of Adak, Alaska M4.22025-12-03 11:39:38 UTC139.6 km185 km WSW of Adak, Alaska M4.62025-12-03 11:39:38 UTC139.6 km M0.72025-12-05 19:15:57 UTC89.7 km38 km ENE of Adak, Alaska M5.12025-12-15 18:03:49 UTC74.3 kmEvent of magnitude 5.1, near of Anchorage (Monde) M5.32025-12-15 18:03:52 UTC55.0 kmAndreanof Islands M4.92025-12-15 18:03:53 UTC54.0 km53 km SSE of Adak, Alaska M5.22025-12-15 18:03:54 UTC47.8 kmAndreanof Islands, Aleutian Islands M0.72025-12-16 22:35:23 UTC114.6 km144 km W of Adak, Alaska M2.92025-12-16 23:17:16 UTC23.5 km67 km SSW of Adak, Alaska M2.92025-12-16 23:17:16 UTC24.7 km63 km SSW of Adak, Alaska

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#9
Earlier events M≥466
Earlier events M≥532
Compared since2025-01-02

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

Strongest earlier events

M6.22025-03-21 14:53:41 UTC85.8 km88 km SSE of Adak, Alaska M6.22025-03-21 14:53:43 UTC69.4 kmAndreanof Islands, Aleutian Islands M5.82025-11-23 08:21:45 UTC23.5 km65 km SSW of Adak, Alaska M5.82025-11-23 08:21:44 UTC30.3 kmAndreanof Islands, Aleutian Islands, United States [Sea: United States] M5.72025-09-21 09:30:33 UTC64.5 kmAndreanof Islands, Aleutian Islands, United States [Sea: United States]

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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