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M5.5 Depth: 54.8 km

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

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

About this earthquake

On November 23, 2025 at 08:21 UTC, a magnitude M5.5 earthquake occurred near ANDREANOF ISLANDS, ALEUTIAN IS. (United States). The hypocenter lay relatively close to the surface at around 55 km, increasing how strongly it was felt. Events of this size can cause damage near the epicenter.

The data is provided by EMSC and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 155 earthquakes, the strongest at M3.8.

Details

Magnitude
M5.5
Depth
54.8 km
UTC time
2025-11-23 08:21:46 UTC
Local time
—
Country
United States
City
Alaska
Source
emsc
Coordinates
51.41120, -177.06840
Temperature
5.4°C

Map

Depth profile

Depth profile Depth: 54.8 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 54.8 km
Shallow
54.8 km
54.8 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: 57 km ·Stratovolcano ·Elevation: 1'307 m ·Last eruption: 2023 ·United States
  • Bobrof
    Distance: 61 km ·Stratovolcano ·Elevation: 738 m ·United States
  • Moffett
    Distance: 63 km ·Stratovolcano ·Elevation: 1'196 m ·Last eruption: -1600 ·United States
  • Takawangha
    Distance: 83 km ·Stratovolcano ·Elevation: 1'449 m ·Last eruption: 1550 ·United States
  • Tanaga
    Distance: 91 km ·Stratovolcano(es) ·Elevation: 1'806 m ·Last eruption: 1914 ·United States
  • Great Sitkin WATCH · ORANGE
    Distance: 98 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 UTC4.6 km M4.22025-11-28 04:32:53 UTC102.0 km143 km WSW of Adak, Alaska M4.22025-12-03 11:39:38 UTC142.9 km185 km WSW of Adak, Alaska M4.62025-12-03 11:39:38 UTC142.9 km M0.72025-12-05 19:15:57 UTC95.2 km38 km ENE of Adak, Alaska M5.12025-12-15 18:03:49 UTC61.8 kmEvent of magnitude 5.1, near of Anchorage (Monde) M5.32025-12-15 18:03:52 UTC48.0 kmAndreanof Islands M4.92025-12-15 18:03:53 UTC46.9 km53 km SSE of Adak, Alaska M5.22025-12-15 18:03:54 UTC45.3 kmAndreanof Islands, Aleutian Islands M0.72025-12-16 22:35:23 UTC124.7 km144 km W of Adak, Alaska M2.92025-12-16 23:17:16 UTC9.3 km67 km SSW of Adak, Alaska M2.92025-12-16 23:17:16 UTC10.7 km63 km SSW of Adak, Alaska

Comparison of seismic sources

2 sources currently report magnitudes from M5.5 to M5.5.

Measurements can differ because agencies use different networks and calculation methods. Values may be revised.

SourceMagnitudeDepthPosition difference
USPM5.510.0 km8.2 km
EMSCM5.554.8 km0.0 km

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#9
Earlier events M≥466
Earlier events M≥531
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 UTC75.0 km88 km SSE of Adak, Alaska M6.22025-03-21 14:53:43 UTC61.1 kmAndreanof Islands, Aleutian Islands M5.82025-11-23 08:21:45 UTC9.1 km65 km SSW of Adak, Alaska M5.82025-11-23 08:21:44 UTC16.1 kmAndreanof Islands, Aleutian Islands, United States [Sea: United States] M5.72025-09-21 09:30:33 UTC65.8 kmAndreanof Islands, Aleutian Islands, United States [Sea: United States]

Historic earthquake map · United States

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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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