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United States · Alaska

M5.8 Earthquake near Unorganized Borough, Alaska (United States)

UTC time: 2026-07-26 08:35:26 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.

Map

M5.8 Earthquake near Unorganized Borough, Alaska (United States) · 2026-07-26 — Map showing the location of the epicenter
M5.8 Earthquake near Unorganized Borough, Alaska (United States) · 2026-07-26 — Map showing the location of the epicenter

About this earthquake

On July 26, 2026 at 08:35 UTC, a magnitude M5.8 earthquake occurred near Unorganized Borough, Alaska (United States). With a focal depth of about 56 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Events of this size can cause damage near the epicenter.

The event was recorded by EMSC. United States: 186 earthquakes were recorded in the past 24 hours, the strongest reaching M3.7.

Depth profile

Depth profile Depth: 56 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 56 km
Shallow
56 km
56 km — deeper than the regional average (15.3 km)
Regional average: 15.3 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

Green No or minimal impact expected.

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 118 km away

Volcanoes nearby

  • Atka Volcanic Complex
    Distance: 52 km ·Stratovolcano(es) ·Elevation: 1'518 m ·Last eruption: 2025 ·United States
  • Seguam
    Distance: 82 km ·Stratovolcano(es) ·Elevation: 1'054 m ·Last eruption: 1993 ·United States
  • Koniuji
    Distance: 107 km ·Stratovolcano ·Elevation: 273 m ·Last eruption: -1150 ·United States
  • Kasatochi
    Distance: 132 km ·Stratovolcano ·Elevation: 314 m ·Last eruption: 2008 ·United States
  • Amukta
    Distance: 169 km ·Stratovolcano ·Elevation: 1'066 m ·Last eruption: 1996 ·United States
  • Great Sitkin WATCH · ORANGE
    Distance: 173 km ·Stratovolcano ·Elevation: 1'740 m ·Last eruption: 2026 ·United States

Radius · 100 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Atka AirportUnited States · AKB · PAAK
    47.8 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-10-29

This selection shows geographic proximity, not a hazard zone or confirmed impacts. Distances use recorded site coordinates. Sources & data dates

Subsequent earthquakes nearby

Events recorded after this earthquake within 150 km. They are not automatically classified as aftershocks.

First 6 hours1
First 24 hours3
First 72 hours4
Strongest subsequent eventM5.0
M4.72026-07-26 13:18:43 UTC61.7 kmAndreanof Islands, Aleutian Islands M3.72026-07-26 16:06:59 UTC53.0 kmANDREANOF ISLANDS, ALEUTIAN IS. M3.92026-07-26 17:16:12 UTC127.7 kmANDREANOF ISLANDS, ALEUTIAN IS. M3.92026-07-27 10:12:07 UTC91.1 km128 km SSE of Atka, Alaska M3.82026-07-31 08:02:07 UTC67.3 km102 km SSE of Atka, Alaska M0.52026-07-31 18:07:50 UTC54.7 kmUnorganized Borough M4.92026-08-01 23:07:00 UTC39.9 kmAndreanof Islands, Aleutian Islands M4.82026-08-02 05:18:36 UTC54.0 kmAndreanof Islands, Aleutian Islands M3.62026-08-08 05:16:41 UTC66.6 km100 km SSE of Atka, Alaska M5.02026-08-09 03:36:11 UTC27.0 kmAlaska M3.82026-08-11 02:11:11 UTC62.2 kmANDREANOF ISLANDS, ALEUTIAN IS. M3.82026-08-11 05:53:19 UTC37.8 km66 km SSE of Atka, Alaska

Alaska

Context for this earthquake

05 Oct 2025 – 05 Oct 2026 · M ≥ 3.0 · 653 Catalogue entries

Sufficiently reliable matching data are not currently available for a direct comparison. The area profile shows the available records and their limitations.

Open seismic profile

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#2
Earlier events M≥466
Earlier events M≥521
Compared since2025-01-13

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

Strongest earlier events

M6.22025-09-03 20:57:41 UTC125.7 km87 km SW of Nikolski, Alaska M5.82026-07-26 08:35:22 UTC53.5 kmAndreanof Islands, Aleutian Islands, United States [Sea: United States] M5.62026-05-22 12:16:14 UTC140.2 km###.# km ( ###.# mi) NW (az= 304.0) from Port Orford, OR M5.62026-05-22 12:16:13 UTC126.1 kmFox Islands, Aleutian Islands M5.62026-05-22 12:16:13 UTC135.6 kmFOX 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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