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M5.5 Depth: 10.0 km

M5.5 Earthquake near Andreanof Islands, Aleutian Islands

UTC time: 2025-09-21 09:30:26 UTC Local time: —

About this earthquake

On September 21, 2025 at 09:30 UTC, a magnitude M5.5 earthquake occurred near Andreanof Islands, Aleutian Islands. With a focal depth of about 10 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Events of this size can cause damage near the epicenter.

The event was recorded by GFZ.

Details

Magnitude
M5.5
Depth
10.0 km
UTC time
2025-09-21 09:30:26 UTC
Local time
—
Country
—
Source
gfz
Coordinates
51.27000, -178.00000
Temperature
7.8°C

Map

Depth profile

Depth profile Depth: 10 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 10 km
Shallow
10 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: 67 km ·Stratovolcano ·Elevation: 1'449 m ·Last eruption: 1550 ·United States
  • Tanaga
    Distance: 69 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: 81 km ·Stratovolcano ·Elevation: 738 m ·United States
  • Kanaga
    Distance: 93 km ·Stratovolcano ·Elevation: 1'307 m ·Last eruption: 2023 ·United States
  • Moffett
    Distance: 114 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 hours4
First 24 hours4
First 72 hours4
Strongest subsequent eventM5.7
M5.62025-09-21 09:30:27 UTC10.7 km123 km SW of Adak, Alaska M5.52025-09-21 09:30:27 UTC9.2 km M5.52025-09-21 09:30:30 UTC13.6 kmAlaska M5.72025-09-21 09:30:33 UTC1.8 kmAndreanof Islands, Aleutian Islands, United States [Sea: United States] M3.62025-09-24 21:21:20 UTC137.1 km89 km SSE of Adak, Alaska M3.42025-09-28 20:31:17 UTC83.4 km100 km S of Adak, Alaska M2.92025-10-04 18:45:13 UTC133.1 km244 km WSW of Adak, Alaska M4.02025-10-05 01:51:45 UTC106.4 km M4.32025-10-05 01:51:46 UTC109.1 km200 km W of Adak, Alaska M5.02025-10-11 13:51:15 UTC119.9 kmAndreanof Islands, Aleutian Islands M4.52025-10-11 13:51:18 UTC132.2 km M5.02025-10-20 18:45:26 UTC69.8 km

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#5
Earlier events M≥450
Earlier events M≥517
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 UTC135.0 km88 km SSE of Adak, Alaska M6.22025-03-21 14:53:43 UTC125.7 kmAndreanof Islands, Aleutian Islands M5.62025-03-22 09:49:21 UTC131.9 km87 km SSE of Adak, Alaska M5.62025-03-20 04:28:52 UTC132.2 km87 km SSE of Adak, Alaska M5.42025-03-20 05:13:06 UTC134.1 km94 km SSE of Adak, Alaska

Stats (last 24h)

Global (24h)
660
Country (24h)
—
—
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