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United States · Alaska

M5.0 Earthquake near Unorganized Borough, Alaska (United States)

UTC time: 2026-01-23 08:25:41 UTC Local time: —
Earthquake newsQuakeMap24
Archive record · original publication time was not recorded Content updated:

Automatically generated from measurement data by QuakeMap24. Values may change after further analysis.

Map

M5.0 Earthquake near Unorganized Borough, Alaska (United States) · 2026-01-23 — Map showing the location of the epicenter
M5.0 Earthquake near Unorganized Borough, Alaska (United States) · 2026-01-23 — Map showing the location of the epicenter

About this earthquake

On January 23, 2026 at 08:25 UTC, a magnitude M5.0 earthquake occurred near Unorganized Borough, Alaska (United States). The hypocenter lay relatively close to the surface at around 10 km, increasing how strongly it was felt. Events of this size can cause damage near the epicenter.

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.

Depth profile

Depth profile Depth: 10 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 10 km
Shallow
10 km
10 km — shallower 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

Official USGS aftershock forecast

Probability of at least one aftershock at or above the specified magnitude during the entire stated time window. This does not predict an individual earthquake.

Issued: Oct 2, 2026, 8:25 AM UTC · Last checked: Oct 4, 2026, 6:22 PM UTC

Oct 2, 2026, 9:00 AM UTC – Oct 3, 2026, 9:00 AM UTC · Expired
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.00.12 %0–0
M ≥ 4.00.01 %0–0
M ≥ 5.0< 0.01 %0–0
M ≥ 6.0< 0.01 %0–0
M ≥ 7.0< 0.01 %0–0
Oct 2, 2026, 9:00 AM UTC – Oct 9, 2026, 9:00 AM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.00.81 %0–0
M ≥ 4.00.08 %0–0
M ≥ 5.0< 0.01 %0–0
M ≥ 6.0< 0.01 %0–0
M ≥ 7.0< 0.01 %0–0
Oct 2, 2026, 9:00 AM UTC – Nov 1, 2026, 9:00 AM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.03.26 %0–1
M ≥ 4.00.34 %0–0
M ≥ 5.00.03 %0–0
M ≥ 6.0< 0.01 %0–0
M ≥ 7.0< 0.01 %0–0
Oct 2, 2026, 9:00 AM UTC – Oct 2, 2027, 9:00 AM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.021.66 %0–2
M ≥ 4.02.74 %0–1
M ≥ 5.00.28 %0–0
M ≥ 6.00.03 %0–0
M ≥ 7.0< 0.01 %0–0

The range is the 95% forecast interval for the number of earthquakes. Magnitude thresholds and time windows overlap: do not add the values. Windows already in progress still refer to the entire stated period.

Source: USGS — Operational Aftershock Forecast

Volcanoes nearby

  • Kiska
    Distance: 18 km ·Stratovolcano ·Elevation: 1'220 m ·Last eruption: 1990 ·United States
  • Segula
    Distance: 55 km ·Stratovolcano ·Elevation: 1'160 m ·United States
  • Davidof
    Distance: 69 km ·Stratovolcano ·Elevation: 328 m ·United States
  • Little Sitkin
    Distance: 84 km ·Stratovolcano ·Elevation: 1'174 m ·Last eruption: 1830 ·United States
  • Buldir
    Distance: 101 km ·Stratovolcano ·Elevation: 656 m ·United States
  • Semisopochnoi
    Distance: 154 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, 48 have a higher stored magnitude. Different magnitude types and reports not yet merged limit the comparison.

Open seismic profile

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#25
Earlier events M≥447
Earlier events M≥525
Compared since2025-01-30

The QuakeMap24 comparison dataset begins on 2024-03-23. Earlier earthquakes may not be included.

Strongest earlier events

M6.12026-01-15 08:52:45 UTC80.7 kmRat Islands, Aleutian Islands, United States [Sea: United States] M5.92026-01-15 08:52:47 UTC60.9 km271 km ESE of Attu Station, Alaska M5.92026-01-15 08:52:45 UTC72.9 kmRat Islands, Aleutian Islands M5.92026-01-15 08:52:45 UTC71.4 kmRAT ISLANDS, ALEUTIAN ISLANDS M5.82025-12-13 10:50:47 UTC94.0 kmRat Islands, Aleutian Islands

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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