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M5.6 Earthquake near 87 km SSE of Adak, Alaska

UTC time: 2025-03-20 04:28:52 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
M5.6
Depth
17.0 km
Source
USGS

87 km SSE of Adak, Alaska

Map

M5.6 Earthquake near 87 km SSE of Adak, Alaska · 2025-03-20 — Map showing the location of the epicenter
M5.6 Earthquake near 87 km SSE of Adak, Alaska · 2025-03-20 — Map showing the location of the epicenter

About this earthquake

A magnitude M5.6 earthquake was recorded near 87 km SSE of Adak, Alaska on March 20, 2025 at 04:28 UTC. With a focal depth of about 17 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 USGS.

Details

ID
c2d70860c294dd034ffc10e22416b345c28f1b61
Magnitude
M5.6
Depth
17.0 km
UTC time
2025-03-20 04:28:52 UTC
Local time
—
Country
—
Source
usgs
Coordinates
51.16280, -176.11000

Depth profile

Depth profile Depth: 17 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 17 km
Shallow
17 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

  • Moffett
    Distance: 97 km ·Stratovolcano ·Elevation: 1'196 m ·Last eruption: -1600 ·United States
  • Great Sitkin WATCH · ORANGE
    Distance: 102 km ·Stratovolcano ·Elevation: 1'740 m ·Last eruption: 2026 ·United States
  • Kanaga
    Distance: 112 km ·Stratovolcano ·Elevation: 1'307 m ·Last eruption: 2023 ·United States
  • Kasatochi
    Distance: 120 km ·Stratovolcano ·Elevation: 314 m ·Last eruption: 2008 ·United States
  • Bobrof
    Distance: 124 km ·Stratovolcano ·Elevation: 738 m ·United States
  • Koniuji
    Distance: 136 km ·Stratovolcano ·Elevation: 273 m ·Last eruption: -1150 ·United States

Radius · 100 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Adak AirportUnited States · ADK · PADK
    88.2 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-09-21

This selection shows geographic proximity, not a hazard zone or confirmed impacts. Distances use recorded site coordinates. Sources & data dates

Subsequent earthquakes nearby

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

First 6 hours27
First 24 hours83
First 72 hours212
Strongest subsequent eventM6.2
M5.22025-03-20 04:28:53 UTC35.3 kmAndreanof Islands, Aleutian Islands M5.12025-03-20 05:13:06 UTC64.9 kmUnorganized Borough M3.42025-03-20 05:18:43 UTC5.9 km92 km SSE of Adak, Alaska M2.72025-03-20 05:22:21 UTC10.9 km97 km SSE of Adak, Alaska M3.42025-03-20 05:26:17 UTC12.2 km98 km SSE of Adak, Alaska M3.22025-03-20 05:35:45 UTC4.6 km89 km SSE of Adak, Alaska M3.52025-03-20 05:46:50 UTC7.1 km80 km SSE of Adak, Alaska M2.22025-03-20 05:58:57 UTC5.4 km91 km SSE of Adak, Alaska M5.12025-03-20 06:07:06 UTC0.9 kmAndreanof Islands, Aleutian Islands M2.62025-03-20 06:25:50 UTC6.6 km93 km SSE of Adak, Alaska M3.02025-03-20 06:35:06 UTC4.0 km83 km SSE of Adak, Alaska M4.02025-03-20 06:50:29 UTC1.7 km87 km SSE of Adak, Alaska

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#1
Earlier events M≥49
Earlier events M≥52
Compared since2025-01-02

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

Strongest earlier events

M5.02025-03-19 08:13:08 UTC13.5 km98 km SSE of Adak, Alaska M5.02025-02-27 21:48:30 UTC122.7 km53 km NE of Adak, Alaska M4.92025-01-22 13:26:06 UTC43.2 km51 km S of Adak, Alaska M4.82025-03-19 09:20:12 UTC12.8 km76 km SSE of Adak, Alaska M4.32025-03-01 16:13:45 UTC83.6 km114 km SSW of Atka, Alaska

Stats (last 24h)

Global (24h)
637
Country (24h)
—
—
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