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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: 174 earthquakes were recorded in the past 24 hours, the strongest reaching M3.9.

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 (15.2 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

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: 2026-09-14

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

14 Sep 2025 – 14 Sep 2026 · M ≥ 3.0 · 657 Catalogue entries

Of 656 other entries for this area and period, 7 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#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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