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United States · Alaska

M2.7 Earthquake near Matanuska-Susitna Borough, Alaska (United States)

UTC time: 2026-09-21 21:17:48 UTC Local time: —
Magnitude
M2.7
Depth
100.5 km
Source
USGS

Alaska · Matanuska-Susitna Borough

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About this earthquake

A magnitude M2.7 earthquake was recorded near Matanuska-Susitna Borough, Alaska (United States) on September 21, 2026 at 21:17 UTC. The earthquake originated at an intermediate depth of about 101 km. Events of this size typically go unnoticed.

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 M3.0.

Depth profile

Depth profile Depth: 100.5 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 100.5 km
Intermediate
100.5 km
100.5 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

  • Hayes
    Distance: 40 km ·Stratovolcano ·Elevation: 3'034 m ·Last eruption: 1200 ·United States
  • Spurr
    Distance: 50 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
  • Redoubt
    Distance: 142 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Iliamna
    Distance: 196 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • Augustine
    Distance: 272 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·United States
  • Buzzard Creek
    Distance: 314 km ·Tuff ring(s) ·Elevation: 830 m ·Last eruption: -1050 ·United States

Alaska

Context for this earthquake

21 Sep 2025 – 21 Sep 2026 · M ≥ 2.0 · 4,119 Catalogue entries

Of 4,118 other entries for this area and period, 919 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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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

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View earthquake KPIs, strongest and latest events, and averages for this country.

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