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M5.5 Earthquake near ANDREANOF ISLANDS, ALEUTIAN IS.

UTC time: 2025-09-21 09:30:27 UTC Local time: —
Earthquake newsQuakeMap24
Archive record · original publication time was not recorded

Automatically generated from measurement data by QuakeMap24. Values may change after further analysis.

Magnitude
M5.5
Depth
24.7 km
Source
EMSC

ANDREANOF ISLANDS, ALEUTIAN IS.

Map

M5.5 Earthquake near ANDREANOF ISLANDS, ALEUTIAN IS. · 2025-09-21 — Map showing the location of the epicenter
M5.5 Earthquake near ANDREANOF ISLANDS, ALEUTIAN IS. · 2025-09-21 — Map showing the location of the epicenter

About this earthquake

A magnitude M5.5 earthquake was recorded near ANDREANOF ISLANDS, ALEUTIAN IS. on September 21, 2025 at 09:30 UTC. With a focal depth of about 25 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Earthquakes of this magnitude can damage poorly built structures.

The event was recorded by EMSC.

Details

ID
b27548fd52f223979180829b4dedc7b058b44192
Magnitude
M5.5
Depth
24.7 km
UTC time
2025-09-21 09:30:27 UTC
Local time
—
Country
—
Source
emsc
Coordinates
51.21460, -178.09750
Temperature
9.6°C

Depth profile

Depth profile Depth: 24.7 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 24.7 km
Shallow
24.7 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

  • Takawangha
    Distance: 73 km ·Stratovolcano ·Elevation: 1'449 m ·Last eruption: 1550 ·United States
  • Tanaga
    Distance: 75 km ·Stratovolcano(es) ·Elevation: 1'806 m ·Last eruption: 1914 ·United States
  • Gareloi
    Distance: 80 km ·Stratovolcano ·Elevation: 1'573 m ·Last eruption: 1989 ·United States
  • Bobrof
    Distance: 90 km ·Stratovolcano ·Elevation: 738 m ·United States
  • Kanaga
    Distance: 102 km ·Stratovolcano ·Elevation: 1'307 m ·Last eruption: 2023 ·United States
  • Moffett
    Distance: 124 km ·Stratovolcano ·Elevation: 1'196 m ·Last eruption: -1600 ·United States

Subsequent earthquakes nearby

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

First 6 hours2
First 24 hours2
First 72 hours2
Strongest subsequent eventM5.7
M5.52025-09-21 09:30:30 UTC16.3 kmAlaska M5.72025-09-21 09:30:33 UTC10.7 kmAndreanof Islands, Aleutian Islands, United States [Sea: United States] M3.62025-09-24 21:21:20 UTC143.6 km89 km SSE of Adak, Alaska M3.42025-09-28 20:31:17 UTC87.8 km100 km S of Adak, Alaska M2.92025-10-04 18:45:13 UTC125.2 km244 km WSW of Adak, Alaska M4.02025-10-05 01:51:45 UTC101.9 kmANDREANOF ISLANDS, ALEUTIAN IS. M5.02025-10-11 13:51:15 UTC113.0 kmAndreanof Islands, Aleutian Islands M5.22025-10-11 13:51:17 UTC128.5 km M4.52025-10-11 13:51:18 UTC124.4 kmANDREANOF ISLANDS, ALEUTIAN IS. M5.02025-10-20 18:45:26 UTC77.0 kmANDREANOF ISLANDS, ALEUTIAN IS. M5.02025-10-20 18:45:29 UTC72.3 kmAndreanof Islands, Aleutian Islands

No unambiguous area assignment

Context for this earthquake

This event has no unambiguous country assignment in the analysed catalogue. It is therefore not assigned to a regional profile.

Earthquake overview

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#6
Earlier events M≥457
Earlier events M≥524
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 UTC141.4 km88 km SSE of Adak, Alaska M6.22025-03-21 14:53:43 UTC133.0 kmAndreanof Islands, Aleutian Islands M5.62025-03-22 09:49:21 UTC138.4 km87 km SSE of Adak, Alaska M5.62025-03-20 04:28:54 UTC143.4 km M5.62025-03-20 04:28:52 UTC138.6 km87 km SSE of Adak, Alaska

Stats (last 24h)

Global (24h)
684
Country (24h)
—
—
Current earthquakes in
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No recent events available.

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