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M5.3 Depth: 10.0 km

M5.3 Earthquake near Alaska (United States)

UTC time: 2025-09-21 09:30:26 UTC Local time: —
M5.3 earthquake near Alaska on Sep 21, 2025 — map of epicenter and shaking intensity | QuakeMap24
M5.3 Earthquake near Alaska (United States) · 2025-09-21 09:30:26 UTC

About this earthquake

A magnitude M5.3 earthquake was recorded near Alaska (United States) on September 21, 2025 at 09:30 UTC. With a focal depth of about 10 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 RESIF. United States: over the past 24 hours, QuakeMap24 logged 166 earthquakes, the strongest at M3.7.

Details

Magnitude
M5.3
Depth
10.0 km
UTC time
2025-09-21 09:30:26 UTC
Local time
—
Country
United States
City
Alaska
Source
resif
Coordinates
51.33480, -178.05232
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
10 km — shallower than the regional average (15.4 km)
Regional average: 15.4 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: 60 km ·Stratovolcano ·Elevation: 1'449 m ·Last eruption: 1550 ·United States
  • Tanaga
    Distance: 62 km ·Stratovolcano(es) ·Elevation: 1'806 m ·Last eruption: 1914 ·United States
  • Gareloi
    Distance: 72 km ·Stratovolcano ·Elevation: 1'573 m ·Last eruption: 1989 ·United States
  • Bobrof
    Distance: 77 km ·Stratovolcano ·Elevation: 738 m ·United States
  • Kanaga
    Distance: 89 km ·Stratovolcano ·Elevation: 1'307 m ·Last eruption: 2023 ·United States
  • Moffett
    Distance: 113 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 UTC18.2 km123 km SW of Adak, Alaska M5.52025-09-21 09:30:27 UTC13.7 kmANDREANOF ISLANDS, ALEUTIAN IS. M5.52025-09-21 09:30:30 UTC6.3 kmAlaska M5.72025-09-21 09:30:33 UTC6.8 kmAndreanof Islands, Aleutian Islands, United States [Sea: United States] M3.62025-09-24 21:21:20 UTC141.4 km89 km SSE of Adak, Alaska M3.42025-09-28 20:31:17 UTC89.6 km100 km S of Adak, Alaska M2.92025-10-04 18:45:13 UTC131.3 km244 km WSW of Adak, Alaska M4.02025-10-05 01:51:45 UTC101.0 kmANDREANOF ISLANDS, ALEUTIAN IS. M4.32025-10-05 01:51:46 UTC103.5 km200 km W of Adak, Alaska M5.02025-10-11 13:51:15 UTC116.7 kmAndreanof Islands, Aleutian Islands M5.22025-10-11 13:51:17 UTC135.4 km M4.52025-10-11 13:51:18 UTC130.4 kmANDREANOF ISLANDS, ALEUTIAN IS.

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#9
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 UTC139.4 km88 km SSE of Adak, Alaska M6.22025-03-21 14:53:43 UTC129.0 kmAndreanof Islands, Aleutian Islands M5.62025-03-22 09:49:21 UTC136.3 km87 km SSE of Adak, Alaska M5.62025-03-20 04:28:54 UTC142.4 km M5.62025-03-20 04:28:52 UTC136.5 km87 km SSE of Adak, Alaska

Historic earthquake map · United States

Open history map
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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