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United States · Alaska

M2.4 Earthquake near Unorganized Borough, Alaska (United States)

UTC time: 2026-09-20 21:18:38 UTC Local time: —

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About this earthquake

A magnitude M2.4 earthquake was recorded near Unorganized Borough, Alaska (United States) on September 20, 2026 at 21:18 UTC. With a focal depth of about 1 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Events of this size typically go unnoticed.

The event was recorded by USGS. United States: 177 earthquakes were recorded in the past 24 hours, the strongest reaching M5.3.

Depth profile

Depth profile Depth: 1.1 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 1.1 km
Shallow
1.1 km
1.1 km — shallower than the regional average (15.2 km)
Regional average: 15.2 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

  • Hayes
    Distance: 205 km ·Stratovolcano ·Elevation: 3'034 m ·Last eruption: 1200 ·United States
  • Spurr
    Distance: 243 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
  • Buzzard Creek
    Distance: 256 km ·Tuff ring(s) ·Elevation: 830 m ·Last eruption: -1050 ·United States
  • Redoubt
    Distance: 328 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Iliamna
    Distance: 377 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • St. Michael
    Distance: 431 km ·Volcanic field ·Elevation: 715 m ·United States

Alaska

Context for this earthquake

20 Sep 2025 – 20 Sep 2026 · M ≥ 2.0 · 4,110 Catalogue entries

Of 4,109 other entries for this area and period, 1,610 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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