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United States · Alaska

M3.3 Earthquake near Matanuska-Susitna Borough, Alaska (United States)

UTC time: 2026-09-23 10:56:20 UTC Local time: —
Magnitude
M3.3
Depth
69.8 km
Source
USGS

Alaska · Matanuska-Susitna Borough

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About this earthquake

On September 23, 2026 at 10:56 UTC, a magnitude M3.3 earthquake occurred near Matanuska-Susitna Borough, Alaska (United States). With a focal depth of about 70 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 186 earthquakes, the strongest at M4.5.

Depth profile

Depth profile Depth: 69.8 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 69.8 km
Shallow
69.8 km
69.8 km — deeper 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: 84 km ·Stratovolcano ·Elevation: 3'034 m ·Last eruption: 1200 ·United States
  • Spurr
    Distance: 98 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
  • Redoubt
    Distance: 186 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Iliamna
    Distance: 239 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • Buzzard Creek
    Distance: 271 km ·Tuff ring(s) ·Elevation: 830 m ·Last eruption: -1050 ·United States
  • Augustine
    Distance: 314 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·United States

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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