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M1.8 Depth: 240.0 km

M1.8 Earthquake near 35 km S of Portage Creek, Alaska (United States)

UTC time: 2025-10-10 10:31:46 UTC Local time: —

About this earthquake

A magnitude M1.8 earthquake was recorded near 35 km S of Portage Creek, Alaska (United States) on October 10, 2025 at 10:31 UTC. At around 240 km, the focal depth places this among intermediate-depth events. Earthquakes of this small magnitude are usually barely noticeable and cause no damage.

The data is provided by USGS and cross-checked across seismological networks. United States: 197 earthquakes were recorded in the past 24 hours, the strongest reaching M5.5.

Details

Magnitude
M1.8
Depth
240.0 km
UTC time
2025-10-10 10:31:46 UTC
Local time
—
Country
United States
City
Alaska
Source
usgs
Coordinates
58.59000, -157.67410
Temperature
8.1°C

Map

Depth profile

Depth profile Depth: 240 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 240 km
Intermediate
240 km
240 km — deeper than the regional average (15.4 km)
Regional average: 15.4 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

  • Ukinrek Maars
    Distance: 108 km ·Maar(s) ·Elevation: 91 m ·Last eruption: 1977 ·United States
  • Ugashik-Peulik
    Distance: 121 km ·Stratovolcano ·Elevation: 1'474 m ·Last eruption: 1814 ·United States
  • Martin
    Distance: 143 km ·Stratovolcano ·Elevation: 1'863 m ·Last eruption: 1953 ·United States
  • Mageik
    Distance: 148 km ·Stratovolcano ·Elevation: 2'165 m ·Last eruption: -500 ·United States
  • Novarupta
    Distance: 151 km ·Caldera ·Elevation: 841 m ·Last eruption: 1912 ·United States
  • Griggs
    Distance: 152 km ·Stratovolcano ·Elevation: 2'317 m ·Last eruption: -1790 ·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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