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United States · Alaska

M4.2 Earthquake near Aleutians West Census Area, Alaska (United States)

UTC time: 2026-09-30 19:10:09 UTC Local time: —
Earthquake newsQuakeMap24
Archive record · original publication time was not recorded Content updated:

Automatically generated from measurement data by QuakeMap24. Values may change after further analysis.

Magnitude
M4.2
Depth
119.2 km
Source
USGS

Alaska · Aleutians West Census Area

Country overview

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About this earthquake

A magnitude M4.2 earthquake was recorded near Aleutians West Census Area, Alaska (United States) on September 30, 2026 at 19:10 UTC. At around 119 km, the focal depth places this among intermediate-depth events. Tremors of this size are distinctly felt and can occasionally cause light damage.

The data is provided by USGS and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 160 earthquakes, the strongest at M3.6.

Depth profile

Depth profile Depth: 119.2 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 119.2 km
Intermediate
119.2 km
119.2 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

Ground shaking

II
Weak · Intensity (MMI) II
Felt by a few, no damage.

Tectonic context

Located on the North America Plate.
Near the boundary North America ↔ Pacific · about 146 km away

Volcanoes nearby

  • Semisopochnoi
    Distance: 26 km ·Stratovolcano ·Elevation: 1'221 m ·Last eruption: 2023 ·United States
  • Little Sitkin
    Distance: 47 km ·Stratovolcano ·Elevation: 1'174 m ·Last eruption: 1830 ·United States
  • Davidof
    Distance: 61 km ·Stratovolcano ·Elevation: 328 m ·United States
  • Segula
    Distance: 75 km ·Stratovolcano ·Elevation: 1'160 m ·United States
  • Kiska
    Distance: 113 km ·Stratovolcano ·Elevation: 1'220 m ·Last eruption: 1990 ·United States
  • Buldir
    Distance: 231 km ·Stratovolcano ·Elevation: 656 m ·United States

Alaska

Context for this earthquake

04 Oct 2025 – 04 Oct 2026 · M ≥ 3.0 · 653 Catalogue entries

Of 652 other entries for this area and period, 127 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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