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United States · Alaska

M2.1 Earthquake near Matanuska-Susitna Borough, Alaska (United States)

UTC time: 2026-09-28 05:28:10 UTC Local time: —
Magnitude
M2.1
Depth
69.9 km
Source
USGS

Alaska · Matanuska-Susitna Borough

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About this earthquake

On September 28, 2026 at 05:28 UTC, a magnitude M2.1 earthquake occurred near Matanuska-Susitna Borough, Alaska (United States). The hypocenter lay relatively close to the surface at around 70 km, increasing how strongly it was felt. 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 176 earthquakes, the strongest at M4.8.

Depth profile

Depth profile Depth: 69.9 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 69.9 km
Shallow
69.9 km
69.9 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: 115 km ·Stratovolcano ·Elevation: 3'034 m ·Last eruption: 1200 ·United States
  • Spurr
    Distance: 141 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
  • Buzzard Creek
    Distance: 223 km ·Tuff ring(s) ·Elevation: 830 m ·Last eruption: -1050 ·United States
  • Redoubt
    Distance: 234 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Iliamna
    Distance: 288 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • Wrangell
    Distance: 361 km ·Shield ·Elevation: 4'278 m ·Last eruption: 1912 ·United States

Alaska

Context for this earthquake

28 Sep 2025 – 28 Sep 2026 · M ≥ 2.0 · 4,153 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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Country statistics · United States

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