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M5.5 Depth: 83.0 km

M5.5 Earthquake near 264 km W of Adak, Alaska

UTC time: 2025-08-29 09:14:25 UTC Local time: —

About this earthquake

A magnitude M5.5 earthquake was recorded near 264 km W of Adak, Alaska on August 29, 2025 at 09:14 UTC. The earthquake originated at an intermediate depth of about 83 km. Events of this size can cause damage near the epicenter.

The data is provided by USGS and cross-checked across seismological networks.

Details

Magnitude
M5.5
Depth
83.0 km
UTC time
2025-08-29 09:14:25 UTC
Local time
—
Country
—
Source
usgs
Coordinates
51.63210, 179.55800
Temperature
12.2°C

Map

Depth profile

Depth profile Depth: 83 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 83 km
Intermediate
83 km
Why depth matters

Intermediate-depth quakes are felt across a wider area but usually cause less surface damage.

Depth classes per USGS

Volcanoes nearby

  • Semisopochnoi
    Distance: 33 km ·Stratovolcano ·Elevation: 1'221 m ·Last eruption: 2023 ·United States
  • Little Sitkin
    Distance: 78 km ·Stratovolcano ·Elevation: 1'174 m ·Last eruption: 1830 ·United States
  • Davidof
    Distance: 92 km ·Stratovolcano ·Elevation: 328 m ·United States
  • Segula
    Distance: 107 km ·Stratovolcano ·Elevation: 1'160 m ·United States
  • Kiska
    Distance: 144 km ·Stratovolcano ·Elevation: 1'220 m ·Last eruption: 1990 ·United States
  • Buldir
    Distance: 262 km ·Stratovolcano ·Elevation: 656 m ·United States

Subsequent earthquakes nearby

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

First 6 hours1
First 24 hours1
First 72 hours1
Strongest subsequent eventM5.0
M5.02025-08-29 09:14:26 UTC10.5 kmAlaska M5.02025-09-13 01:58:48 UTC12.2 kmRat Islands, Aleutian Islands M4.52025-09-13 01:58:55 UTC19.1 kmAlaska M4.52025-09-13 01:58:56 UTC15.3 km M4.52025-09-16 19:10:30 UTC95.7 kmRat Islands, Aleutian Islands, Alaska M3.22025-09-17 01:13:38 UTC41.1 km230 km WSW of Adak, Alaska M3.02025-09-17 01:13:38 UTC38.8 km M0.72025-09-19 22:17:08 UTC34.4 km261 km W of Adak, Alaska

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#8
Earlier events M≥433
Earlier events M≥521
Compared since2025-01-30

The QuakeMap24 comparison dataset begins on 2024-03-23. Earlier earthquakes may not be included.

Strongest earlier events

M6.12025-08-28 11:07:35 UTC64.6 kmRat Islands, Aleutian Islands M5.92025-08-28 11:07:50 UTC57.0 kmRat Islands, Aleutian Islands, United States [Sea: United States] M5.92025-08-28 11:07:48 UTC45.9 km241 km W of Adak, Alaska M5.92025-08-28 11:07:48 UTC69.5 km M5.92025-08-28 11:07:48 UTC58.9 kmRat Islands

Stats (last 24h)

Global (24h)
671
Country (24h)
—
—
Current earthquakes in
Magnitude Place Local time
No recent events available.

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