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United States · Alaska

M1.2 Earthquake near Lake and Peninsula Borough, Alaska (United States)

UTC time: 2026-09-21 11:57:04 UTC Local time: —
Magnitude
M1.2
Depth
141.4 km
Source
USGS

Alaska · Lake and Peninsula Borough

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About this earthquake

On September 21, 2026 at 11:57 UTC, a magnitude M1.2 earthquake occurred near Lake and Peninsula Borough, Alaska (United States). The earthquake originated at an intermediate depth of about 141 km. Events of this size typically go unnoticed.

The event was recorded by USGS. United States: 180 earthquakes were recorded in the past 24 hours, the strongest reaching M3.3.

Depth profile

Depth profile Depth: 141.4 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 141.4 km
Intermediate
141.4 km
141.4 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

  • Martin
    Distance: 30 km ·Stratovolcano ·Elevation: 1'863 m ·Last eruption: 1953 ·United States
  • Mageik
    Distance: 36 km ·Stratovolcano ·Elevation: 2'165 m ·Last eruption: -500 ·United States
  • Novarupta
    Distance: 42 km ·Caldera ·Elevation: 841 m ·Last eruption: 1912 ·United States
  • Trident
    Distance: 45 km ·Stratovolcano ·Elevation: 1'864 m ·Last eruption: 1974 ·United States
  • Alaska Peninsula Arc at 155.4°W
    Distance: 47 km ·Lava dome ·Elevation: 402 m ·United States
  • Griggs
    Distance: 48 km ·Stratovolcano ·Elevation: 2'317 m ·Last eruption: -1790 ·United States

Alaska

Context for this earthquake

21 Sep 2025 – 21 Sep 2026 · M ≥ 2.0 · 4,119 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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View earthquake KPIs, strongest and latest events, and averages for this country.

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