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United States · Alaska

M4.0 Earthquake near Unorganized Borough, Alaska (United States)

UTC time: 2026-02-05 19:33:33 UTC Local time: —

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About this earthquake

A magnitude M4.0 earthquake was recorded near Unorganized Borough, Alaska (United States) on February 5, 2026 at 19:33 UTC. The hypocenter lay relatively close to the surface at around 52 km, increasing how strongly it was felt. Tremors of this size are distinctly felt and can occasionally cause light damage.

The event was recorded by EMSC. United States: over the past 24 hours, QuakeMap24 logged 171 earthquakes, the strongest at M3.6.

Depth profile

Depth profile Depth: 51.6 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 51.6 km
Shallow
51.6 km
51.6 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

  • Kiska
    Distance: 40 km ·Stratovolcano ·Elevation: 1'220 m ·Last eruption: 1990 ·United States
  • Segula
    Distance: 59 km ·Stratovolcano ·Elevation: 1'160 m ·United States
  • Davidof
    Distance: 70 km ·Stratovolcano ·Elevation: 328 m ·United States
  • Little Sitkin
    Distance: 83 km ·Stratovolcano ·Elevation: 1'174 m ·Last eruption: 1830 ·United States
  • Buldir
    Distance: 117 km ·Stratovolcano ·Elevation: 656 m ·United States
  • Semisopochnoi
    Distance: 153 km ·Stratovolcano ·Elevation: 1'221 m ·Last eruption: 2023 ·United States

Alaska

Context for this earthquake

04 Oct 2025 – 04 Oct 2026 · M ≥ 3.0 · 653 Catalogue entries

Of 652 other entries for this area and period, 156 have a higher stored magnitude. Different magnitude types and reports not yet merged limit the comparison.

Open seismic profile

Historic earthquake map · United States

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Country statistics · United States

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