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United States

M4.2 Earthquake near 185 km WSW of Adak, Alaska (United States)

UTC time: 2025-12-03 11:39:38 UTC Local time: —

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About this earthquake

On December 3, 2025 at 11:39 UTC, a magnitude M4.2 earthquake occurred near 185 km WSW of Adak, Alaska (United States). The hypocenter lay relatively close to the surface at around 35 km, increasing how strongly it was felt. Earthquakes of this magnitude are clearly felt; minor damage to vulnerable buildings is possible.

The data is provided by USGS and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 159 earthquakes, the strongest at M3.6.

Details

ID
fbc8a608e928431979a8d8bc7a19610056000423
Magnitude
M4.2
Depth
35.0 km
UTC time
2025-12-03 11:39:38 UTC
Local time
—
Country
United States
City
Alaska
Source
usgs
Coordinates
51.23470, -179.10530
Temperature
3.3°C

Depth profile

Depth profile Depth: 35 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 35 km
Shallow
35 km
35 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

  • Gareloi ADVISORY · YELLOW
    Distance: 65 km ·Stratovolcano ·Elevation: 1'573 m ·Last eruption: 1989 ·United States
  • Tanaga
    Distance: 98 km ·Stratovolcano(es) ·Elevation: 1'806 m ·Last eruption: 1914 ·United States
  • Takawangha
    Distance: 104 km ·Stratovolcano ·Elevation: 1'449 m ·Last eruption: 1550 ·United States
  • Bobrof
    Distance: 138 km ·Stratovolcano ·Elevation: 738 m ·United States
  • Kanaga
    Distance: 154 km ·Stratovolcano ·Elevation: 1'307 m ·Last eruption: 2023 ·United States
  • Moffett
    Distance: 181 km ·Stratovolcano ·Elevation: 1'196 m ·Last eruption: -1600 ·United States

Alaska

Context for this earthquake

04 Oct 2025 – 04 Oct 2026 · M ≥ 3.0 · 654 Catalogue entries

Of 653 other entries for this area and period, 127 have a higher stored magnitude. Different magnitude types and reports not yet merged limit the comparison.

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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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