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M5.1 Depth: 59.8 km

M5.1 Earthquake near Unorganized Borough, Alaska (United States)

UTC time: 2026-02-01 12:43:08 UTC Local time: —

About this earthquake

On February 1, 2026 at 12:43 UTC, a magnitude M5.1 earthquake occurred near Unorganized Borough, Alaska (United States). With a focal depth of about 60 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 data is provided by EMSC and cross-checked across seismological networks. United States: 147 earthquakes were recorded in the past 24 hours, the strongest reaching M3.6.

Map

Depth profile

Depth profile Depth: 59.8 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 59.8 km
Shallow
59.8 km
59.8 km — deeper than the regional average (15.9 km)
Regional average: 15.9 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

  • Great Sitkin WATCH · ORANGE
    Distance: 28 km ·Stratovolcano ·Elevation: 1'740 m ·Last eruption: 2026 ·United States
  • Kasatochi
    Distance: 51 km ·Stratovolcano ·Elevation: 314 m ·Last eruption: 2008 ·United States
  • Moffett
    Distance: 52 km ·Stratovolcano ·Elevation: 1'196 m ·Last eruption: -1600 ·United States
  • Koniuji
    Distance: 74 km ·Stratovolcano ·Elevation: 273 m ·Last eruption: -1150 ·United States
  • Kanaga
    Distance: 80 km ·Stratovolcano ·Elevation: 1'307 m ·Last eruption: 2023 ·United States
  • Bobrof
    Distance: 98 km ·Stratovolcano ·Elevation: 738 m ·United States

Subsequent earthquakes nearby

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

First 6 hours0
First 24 hours0
First 72 hours0
Strongest subsequent eventM5.3
M3.12026-02-05 23:32:30 UTC126.1 kmAlaska M1.82026-02-07 00:27:13 UTC57.5 kmUnorganized Borough M5.32026-02-10 23:08:52 UTC43.0 kmAlaska M4.12026-02-12 01:15:07 UTC130.5 kmANDREANOF ISLANDS, ALEUTIAN IS. M3.92026-02-12 23:28:12 UTC68.1 kmANDREANOF ISLANDS, ALEUTIAN IS. M4.42026-02-13 03:19:42 UTC25.2 kmANDREANOF ISLANDS, ALEUTIAN IS. M4.62026-02-17 23:17:00 UTC17.5 kmAlaska M5.02026-02-27 05:17:54 UTC84.8 kmAndreanof Islands, Aleutian Islands M3.02026-03-03 04:29:46 UTC115.7 kmANDREANOF ISLANDS, ALEUTIAN IS.

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#19
Earlier events M≥480
Earlier events M≥531
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 UTC75.5 km88 km SSE of Adak, Alaska M6.22025-03-21 14:53:43 UTC56.3 kmAndreanof Islands, Aleutian Islands M5.82025-11-23 08:21:45 UTC88.4 km65 km SSW of Adak, Alaska M5.82025-11-23 08:21:44 UTC87.7 kmAndreanof Islands, Aleutian Islands, United States [Sea: United States] M5.62025-03-22 09:49:21 UTC75.3 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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