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M5.0 Earthquake near 121 km SW of Adak, Alaska

UTC time: 2025-09-21 09:30:26 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
M5.0
Depth
30.0 km
Source
NNSN

121 km SW of Adak, Alaska

Map

M5.0 Earthquake near 121 km SW of Adak, Alaska · 2025-09-21 — Map showing the location of the epicenter
M5.0 Earthquake near 121 km SW of Adak, Alaska · 2025-09-21 — Map showing the location of the epicenter

About this earthquake

On September 21, 2025 at 09:30 UTC, a magnitude M5.0 earthquake occurred near 121 km SW of Adak, Alaska. With a focal depth of about 30 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 NNSN.

Details

ID
927437dd005bd4ec3cdfe959a34b249f6a10a3ed
Magnitude
M5.0
Depth
30.0 km
UTC time
2025-09-21 09:30:26 UTC
Local time
—
Country
—
Source
nnsn
Coordinates
51.20200, -178.02000

Depth profile

Depth profile Depth: 30 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 30 km
Shallow
30 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: 75 km ·Stratovolcano ·Elevation: 1'449 m ·Last eruption: 1550 ·United States
  • Tanaga
    Distance: 76 km ·Stratovolcano(es) ·Elevation: 1'806 m ·Last eruption: 1914 ·United States
  • Gareloi
    Distance: 85 km ·Stratovolcano ·Elevation: 1'573 m ·Last eruption: 1989 ·United States
  • Bobrof
    Distance: 88 km ·Stratovolcano ·Elevation: 738 m ·United States
  • Kanaga
    Distance: 99 km ·Stratovolcano ·Elevation: 1'307 m ·Last eruption: 2023 ·United States
  • Moffett
    Distance: 121 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 UTC3.3 km123 km SW of Adak, Alaska M5.52025-09-21 09:30:27 UTC5.6 kmANDREANOF ISLANDS, ALEUTIAN IS. M5.52025-09-21 09:30:30 UTC19.2 kmAlaska M5.72025-09-21 09:30:33 UTC9.5 kmAndreanof Islands, Aleutian Islands, United States [Sea: United States] M3.62025-09-24 21:21:20 UTC138.2 km89 km SSE of Adak, Alaska M3.42025-09-28 20:31:17 UTC82.2 km100 km S of Adak, Alaska M2.92025-10-04 18:45:13 UTC130.3 km244 km WSW of Adak, Alaska M4.02025-10-05 01:51:45 UTC107.5 kmANDREANOF ISLANDS, ALEUTIAN IS. M4.32025-10-05 01:51:46 UTC110.5 km200 km W of Adak, Alaska M5.02025-10-11 13:51:15 UTC118.4 kmAndreanof Islands, Aleutian Islands M5.22025-10-11 13:51:17 UTC133.4 km M4.52025-10-11 13:51:18 UTC129.5 kmANDREANOF ISLANDS, ALEUTIAN IS.

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#15
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 UTC136.0 km88 km SSE of Adak, Alaska M6.22025-03-21 14:53:43 UTC127.8 kmAndreanof Islands, Aleutian Islands M5.62025-03-22 09:49:21 UTC132.9 km87 km SSE of Adak, Alaska M5.62025-03-20 04:28:54 UTC137.9 km M5.62025-03-20 04:28:52 UTC133.2 km87 km SSE of Adak, Alaska

Stats (last 24h)

Global (24h)
585
Country (24h)
—
—
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