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United States

M1.1 Earthquake near 29 km NNE of Big Delta, Alaska (United States)

UTC time: 2025-04-28 15:29:11 UTC Local time: —

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About this earthquake

On April 28, 2025 at 15:29 UTC, a magnitude M1.1 earthquake occurred near 29 km NNE of Big Delta, Alaska (United States). The hypocenter lay relatively close to the surface at around 14 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: 172 earthquakes were recorded in the past 24 hours, the strongest reaching M3.9.

Details

ID
c69929cd8307e87791a36c68a45c0125f78bb88a
Magnitude
M1.1
Depth
13.8 km
UTC time
2025-04-28 15:29:11 UTC
Local time
—
Country
United States
Source
usgs
Coordinates
64.39420, -145.59740
Temperature
12.1°C

Depth profile

Depth profile Depth: 13.8 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 13.8 km
Shallow
13.8 km
13.8 km — close to the regional average (15.3 km)
Regional average: 15.3 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

  • Buzzard Creek
    Distance: 142 km ·Tuff ring(s) ·Elevation: 830 m ·Last eruption: -1050 ·United States
  • Wrangell
    Distance: 277 km ·Shield ·Elevation: 4'278 m ·Last eruption: 1912 ·United States
  • Churchill
    Distance: 388 km ·Stratovolcano ·Elevation: 5'005 m ·Last eruption: 847 ·United States
  • Fort Selkirk
    Distance: 436 km ·Volcanic field ·Elevation: 1'239 m ·Canada
  • Hayes
    Distance: 460 km ·Stratovolcano ·Elevation: 3'034 m ·Last eruption: 1200 ·United States
  • Spurr
    Distance: 482 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States

Historic earthquake map · United States

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Explore recent and long-term earthquake activity in this country. Use filters to narrow down by magnitude, depth, and date range.

Country statistics · United States

Country overview
View earthquake KPIs, strongest and latest events, and averages for this country.

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