Back to map

M5.8 Earthquake near 105 km SSE of Atka, Alaska

UTC time: 2026-07-26 08:35:20 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. How our reports are produced ↗

Magnitude
M5.8
Depth
5.0 km
Source
USGS

105 km SSE of Atka, Alaska

Map

M5.8 Earthquake near 105 km SSE of Atka, Alaska · 2026-07-26 — Map showing the location of the epicenter
M5.8 Earthquake near 105 km SSE of Atka, Alaska · 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 105 km SSE of Atka, Alaska. With a focal depth of about 5 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
dd4aa871ec5009ebf96d8eadb03b09eabe0c4e78
Magnitude
M5.8
Depth
5.0 km
UTC time
2026-07-26 08:35:20 UTC
Local time
—
Country
—
Source
usgs
Coordinates
51.40600, -173.35200
Temperature
11.0°C

Depth profile

Depth profile Depth: 5 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 5 km
Shallow
5 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: Sep 6, 2026, 8:35 AM UTC · Last checked: Sep 7, 2026, 12:22 AM UTC

Sep 6, 2026, 9:00 AM UTC – Sep 7, 2026, 9:00 AM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.05.88 %0–1
M ≥ 4.00.61 %0–0
M ≥ 5.00.06 %0–0
M ≥ 6.0< 0.01 %0–0
M ≥ 7.0< 0.01 %0–0
Sep 6, 2026, 9:00 AM UTC – Sep 13, 2026, 9:00 AM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.031.99 %0–2
M ≥ 4.03.93 %0–1
M ≥ 5.00.40 %0–0
M ≥ 6.00.04 %0–0
M ≥ 7.0< 0.01 %0–0
Sep 6, 2026, 9:00 AM UTC – Oct 6, 2026, 9:00 AM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.071.34 %0–5
M ≥ 4.013.22 %0–1
M ≥ 5.01.43 %0–0
M ≥ 6.00.14 %0–0
M ≥ 7.00.01 %0–0
Sep 6, 2026, 9:00 AM UTC – Sep 6, 2027, 9:00 AM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.098.42 %1–17
M ≥ 4.046.71 %0–3
M ≥ 5.06.49 %0–1
M ≥ 6.00.67 %0–0
M ≥ 7.00.07 %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

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 49 km away

Volcanoes nearby

  • Atka Volcanic Complex
    Distance: 116 km ·Stratovolcano(es) ·Elevation: 1'518 m ·Last eruption: 2025 ·United States
  • Seguam
    Distance: 116 km ·Stratovolcano(es) ·Elevation: 1'054 m ·Last eruption: 1993 ·United States
  • Koniuji
    Distance: 152 km ·Stratovolcano ·Elevation: 273 m ·Last eruption: -1150 ·United States
  • Kasatochi
    Distance: 171 km ·Stratovolcano ·Elevation: 314 m ·Last eruption: 2008 ·United States
  • Amukta
    Distance: 188 km ·Stratovolcano ·Elevation: 1'066 m ·Last eruption: 1996 ·United States
  • Chagulak
    Distance: 199 km ·Stratovolcano ·Elevation: 1'028 m ·United States

Subsequent earthquakes nearby

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

First 6 hours2
First 24 hours4
First 72 hours5
Strongest subsequent eventM5.8
M5.82026-07-26 08:35:26 UTC69.0 kmUnorganized Borough M4.72026-07-26 13:18:43 UTC9.1 kmAndreanof Islands, Aleutian Islands M3.72026-07-26 16:06:59 UTC16.1 kmANDREANOF ISLANDS, ALEUTIAN IS. M3.92026-07-26 17:16:12 UTC124.5 kmANDREANOF ISLANDS, ALEUTIAN IS. M3.92026-07-27 10:12:07 UTC23.3 km128 km SSE of Atka, Alaska M3.82026-07-31 08:02:07 UTC4.2 km102 km SSE of Atka, Alaska M0.52026-07-31 18:07:50 UTC121.1 kmUnorganized Borough M4.92026-08-01 23:07:00 UTC29.0 kmAndreanof Islands, Aleutian Islands M4.82026-08-02 05:18:36 UTC15.4 kmAndreanof Islands, Aleutian Islands M3.62026-08-08 05:16:41 UTC8.4 km100 km SSE of Atka, Alaska M5.02026-08-09 03:36:11 UTC89.4 kmAlaska M3.82026-08-11 02:11:11 UTC6.8 kmANDREANOF ISLANDS, ALEUTIAN IS.

Comparison of seismic sources

6 sources currently report magnitudes from M5.6 to M5.8.

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

SourceMagnitudeDepthPosition difference
SERBIA_RSZM5.710.0 km26.2 km
USGSM5.810.0 km10.9 km
GFZM5.710.0 km28.3 km
ISCM5.613.0 km19.6 km
RESIFM5.610.0 km26.4 km
INGVM5.811.7 km19.8 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#2
Earlier events M≥449
Earlier events M≥514
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 UTC79.3 km87 km SW of Nikolski, Alaska M5.42025-07-16 14:21:52 UTC74.4 km58 km ESE of Atka, Alaska M5.42025-07-16 14:21:52 UTC84.6 kmANDREANOF ISLANDS, ALEUTIAN IS. M5.22026-05-22 12:16:17 UTC149.9 km162 km E of Atka, Alaska M5.22025-05-30 09:44:29 UTC101.3 km37 km ENE of Atka, Alaska

Stats (last 24h)

Global (24h)
505
Country (24h)
—
—
Current earthquakes in
Magnitude Place Local time
No recent events available.

Share