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M1.0 Depth: 16.0 km

M1.0 Earthquake near 16 km N of Four Mile Road, Alaska (United States)

UTC time: 2025-08-21 02:10:57 UTC Local time: —

About this earthquake

A magnitude M1.0 earthquake was recorded near 16 km N of Four Mile Road, Alaska (United States) on August 21, 2025 at 02:10 UTC. The hypocenter lay relatively close to the surface at around 16 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: 201 earthquakes were recorded in the past 24 hours, the strongest reaching M3.7.

Details

Magnitude
M1.0
Depth
16.0 km
UTC time
2025-08-21 02:10:57 UTC
Local time
—
Country
United States
City
Alaska
Source
usgs
Coordinates
64.75250, -149.09480
Temperature
14.6°C

Map

Depth profile

Depth profile Depth: 16 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 16 km
Shallow
16 km
16 km — close to the regional average (15.4 km)
Regional average: 15.4 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: 83 km ·Tuff ring(s) ·Elevation: 830 m ·Last eruption: -1050 ·United States
  • Hayes
    Distance: 384 km ·Stratovolcano ·Elevation: 3'034 m ·Last eruption: 1200 ·United States
  • Wrangell
    Distance: 396 km ·Shield ·Elevation: 4'278 m ·Last eruption: 1912 ·United States
  • Spurr
    Distance: 416 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States

Historic earthquake map · United States

Open history map
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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