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M5.5 Depth: 24.7 km

M5.5 Earthquake near ANDREANOF ISLANDS, ALEUTIAN IS.

UTC time: 2025-09-21 09:30:27 UTC Local time: —

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

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

Map

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 km M4.32025-10-05 01:51:46 UTC105.0 km200 km W of Adak, Alaska M5.02025-10-11 13:51:15 UTC113.0 kmAndreanof Islands, Aleutian Islands M4.52025-10-11 13:51:18 UTC124.4 km M5.02025-10-20 18:45:26 UTC77.0 km M5.02025-10-20 18:45:29 UTC72.3 kmAndreanof Islands, Aleutian Islands

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#5
Earlier events M≥452
Earlier events M≥519
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 04:28:52 UTC138.6 km87 km SSE of Adak, Alaska M5.52025-09-21 09:30:26 UTC9.2 kmAndreanof Islands, Aleutian Islands

Stats (last 24h)

Global (24h)
669
Country (24h)
—
—
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