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M5.0 Earthquake near 239 km ESE of Attu Station, Alaska

UTC time: 2026-08-23 23:20:35 UTC Local time: —
Earthquake newsQuakeMap24
Archive record · original publication time was not recorded

Automatically generated from measurement data by QuakeMap24. Values may change after further analysis. How our reports are produced ↗

Magnitude
M5.0
Depth
8.0 km
Source
USGS

239 km ESE of Attu Station, Alaska

Map

M5.0 Earthquake near 239 km ESE of Attu Station, Alaska · 2026-08-23 — Map showing the location of the epicenter
M5.0 Earthquake near 239 km ESE of Attu Station, Alaska · 2026-08-23 — Map showing the location of the epicenter

About this earthquake

On August 23, 2026 at 23:20 UTC, a magnitude M5.0 earthquake occurred near 239 km ESE of Attu Station, Alaska. With a focal depth of about 8 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Earthquakes of this magnitude can damage poorly built structures.

The event was recorded by USGS.

Details

ID
c77c66d088041cda754d03e735dcb289db629838
Magnitude
M5.0
Depth
8.0 km
UTC time
2026-08-23 23:20:35 UTC
Local time
—
Country
—
Source
usgs
Coordinates
52.07760, 176.47970
Temperature
9.2°C

Depth profile

Depth profile Depth: 8 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 8 km
Shallow
8 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

Estimated impact

1 Felt reports · max reported intensity 3.1

Ground shaking

IV
Light · Intensity (MMI) IV
Felt by many, no damage.

Tectonic context

Located on the North America Plate.
Near the boundary North America ↔ Pacific · about 121 km away

Volcanoes nearby

  • Buldir
    Distance: 49 km ·Stratovolcano ·Elevation: 656 m ·United States
  • Kiska
    Distance: 77 km ·Stratovolcano ·Elevation: 1'220 m ·Last eruption: 1990 ·United States
  • Segula
    Distance: 113 km ·Stratovolcano ·Elevation: 1'160 m ·United States
  • Davidof
    Distance: 127 km ·Stratovolcano ·Elevation: 328 m ·United States
  • Little Sitkin
    Distance: 142 km ·Stratovolcano ·Elevation: 1'174 m ·Last eruption: 1830 ·United States
  • Semisopochnoi
    Distance: 213 km ·Stratovolcano ·Elevation: 1'221 m ·Last eruption: 2023 ·United States

Comparison of seismic sources

3 sources currently report magnitudes from M5.0 to M5.0.

Measurements can differ because agencies use different networks and calculation methods. Values may be revised.

SourceMagnitudeDepthPosition difference
USGSM5.08.0 km0.0 km
GFZM5.010.0 km11.9 km
EMSCM5.031.0 km26.2 km

No unambiguous area assignment

Context for this earthquake

This event has no unambiguous country assignment in the analysed catalogue. It is therefore not assigned to a regional profile.

Earthquake overview

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#64
Earlier events M≥4162
Earlier events M≥568
Compared since2025-01-30

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

Strongest earlier events

M6.52026-03-04 17:54:38 UTC22.4 km224 km ESE of Attu Station, Alaska M6.42026-03-04 17:54:36 UTC22.4 km###.# km ( ###.# mi) NW (az= 308.7) from Wendover, UT M6.12026-03-04 17:54:37 UTC110.8 kmRat Islands, Aleutian Islands M6.12026-03-04 17:54:35 UTC126.7 km M6.12026-01-15 08:52:45 UTC65.3 kmRat Islands, Aleutian Islands, United States [Sea: United States]

Stats (last 24h)

Global (24h)
512
Country (24h)
—
—
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