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United States · Alaska

M1.1 Earthquake near Lake and Peninsula Borough, Alaska (United States)

UTC time: 2026-08-28 11:32:51 UTC Local time: —
Magnitude
M1.1
Depth
28.2 km
Source
USGS

Alaska · Lake and Peninsula Borough

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About this earthquake

On August 28, 2026 at 11:32 UTC, a magnitude M1.1 earthquake occurred near Lake and Peninsula Borough, Alaska (United States). With a focal depth of about 28 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Events of this size typically go unnoticed.

The event was recorded by USGS. United States: 172 earthquakes were recorded in the past 24 hours, the strongest reaching M4.6.

Depth profile

Depth profile Depth: 28.2 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 28.2 km
Shallow
28.2 km
28.2 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

  • Alaska Peninsula Arc at 155.4°W
    Distance: 25 km ·Lava dome ·Elevation: 402 m ·United States
  • Ugashik-Peulik
    Distance: 37 km ·Stratovolcano ·Elevation: 1'474 m ·Last eruption: 1814 ·United States
  • Martin
    Distance: 40 km ·Stratovolcano ·Elevation: 1'863 m ·Last eruption: 1953 ·United States
  • Ukinrek Maars
    Distance: 42 km ·Maar(s) ·Elevation: 91 m ·Last eruption: 1977 ·United States
  • Mageik
    Distance: 46 km ·Stratovolcano ·Elevation: 2'165 m ·Last eruption: -500 ·United States
  • Novarupta
    Distance: 55 km ·Caldera ·Elevation: 841 m ·Last eruption: 1912 ·United States

Alaska

Context for this earthquake

05 Oct 2025 – 05 Oct 2026 · M ≥ 2.0 · 4,148 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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