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United States · Alaska

M3.1 Earthquake near Unorganized Borough, Alaska (United States)

UTC time: 2026-08-23 02:23:48 UTC Local time: —

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About this earthquake

On August 23, 2026 at 02:23 UTC, a magnitude M3.1 earthquake occurred near Unorganized Borough, Alaska (United States). With a focal depth of about 8 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Earthquakes of this magnitude are often felt but rarely cause damage.

The data is provided by USGS and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 180 earthquakes, the strongest at M4.1.

Depth profile

Depth profile Depth: 7.8 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 7.8 km
Shallow
7.8 km
7.8 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: 182 km ·Stratovolcano ·Elevation: 3'034 m ·Last eruption: 1200 ·United States
  • Spurr
    Distance: 202 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
  • Redoubt
    Distance: 232 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Iliamna
    Distance: 260 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • Augustine
    Distance: 316 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·United States
  • St. Michael
    Distance: 362 km ·Volcanic field ·Elevation: 715 m ·United States

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Stony River 2 AirportUnited States · SRV · SRV
    45.4 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-11-15

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

Alaska

Context for this earthquake

05 Oct 2025 – 05 Oct 2026 · M ≥ 3.0 · 653 Catalogue entries

Sufficiently reliable matching data are not currently available for a direct comparison. The area profile shows the available records and their limitations.

Open seismic profile

Historic earthquake map · United States

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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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