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United States · Alaska

M4.0 Earthquake near Unorganized Borough, Alaska (United States)

UTC time: 2026-09-10 21:14:02 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.

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About this earthquake

A magnitude M4.0 earthquake was recorded near Unorganized Borough, Alaska (United States) on September 10, 2026 at 21:14 UTC. The earthquake originated at an intermediate depth of about 100 km. Earthquakes of this magnitude are clearly felt; minor damage to vulnerable buildings is possible.

The data is provided by USGS and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 236 earthquakes, the strongest at M5.4.

Depth profile

Depth profile Depth: 100.1 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 100.1 km
Intermediate
100.1 km
100.1 km — deeper than the regional average (15.2 km)
Regional average: 15.2 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

  • Little Sitkin
    Distance: 30 km ·Stratovolcano ·Elevation: 1'174 m ·Last eruption: 1830 ·United States
  • Davidof
    Distance: 37 km ·Stratovolcano ·Elevation: 328 m ·United States
  • Segula
    Distance: 48 km ·Stratovolcano ·Elevation: 1'160 m ·United States
  • Semisopochnoi
    Distance: 74 km ·Stratovolcano ·Elevation: 1'221 m ·Last eruption: 2023 ·United States
  • Kiska
    Distance: 82 km ·Stratovolcano ·Elevation: 1'220 m ·Last eruption: 1990 ·United States
  • Buldir
    Distance: 197 km ·Stratovolcano ·Elevation: 656 m ·United States

Alaska

Context for this earthquake

12 Sep 2025 – 12 Sep 2026 · M ≥ 3.0 · 661 Catalogue entries

Of 660 other entries for this area and period, 158 have a higher stored magnitude. Different magnitude types and reports not yet merged limit the comparison.

Open seismic profile

Historic earthquake map · United States

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Country statistics · United States

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