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M5.5 Earthquake near 100 km SE of Akkeshi, Japan

UTC time: 2025-08-01 22:27:34 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
M5.5
Depth
10.0 km
Source
NNSN

100 km SE of Akkeshi, Japan

Map

M5.5 Earthquake near 100 km SE of Akkeshi, Japan · 2025-08-01 — Map showing the location of the epicenter
M5.5 Earthquake near 100 km SE of Akkeshi, Japan · 2025-08-01 — Map showing the location of the epicenter

About this earthquake

On August 1, 2025 at 22:27 UTC, a magnitude M5.5 earthquake occurred near 100 km SE of Akkeshi, Japan. With a focal depth of about 10 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 NNSN.

Details

ID
320d00ab3592946fc891b5a053df371b065ced58
Magnitude
M5.5
Depth
10.0 km
UTC time
2025-08-01 22:27:34 UTC
Local time
—
Country
—
Source
nnsn
Coordinates
42.35700, 145.65600

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
Why depth matters

Shallow quakes release energy near the surface — shaking is felt more strongly and damage potential is higher.

Depth classes per USGS

Nearby population centers

Distances are straight-line distances from the epicenter. Population data: GeoNames.

PlaceDistanceDirectionPopulation
Nemuro107.7 kmN31'223
Kushiro125.3 kmNW167'875
Sapporo360.5 kmW1'973'832

GeoNames · CC BY 4.0

Volcanoes nearby

  • Mashu
    Distance: 162 km ·Caldera ·Elevation: 857 m ·Last eruption: 1080 ·Japan
  • Tomariyama [Golovnin]
    Distance: 166 km ·Caldera ·Elevation: 535 m ·Last eruption: 1848 ·Japan - administered by Russia
  • Kussharo
    Distance: 172 km ·Caldera ·Elevation: 574 m ·Last eruption: 1320 ·Japan
  • Akan
    Distance: 176 km ·Caldera ·Elevation: 1'499 m ·Last eruption: 2026 ·Japan
  • Raususan [Mendeleev]
    Distance: 180 km ·Stratovolcano ·Elevation: 882 m ·Last eruption: 1880 ·Japan - administered by Russia
  • Tenchozan
    Distance: 193 km ·Crater rows ·Elevation: 1'046 m ·Japan

Subsequent earthquakes nearby

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

First 6 hours0
First 24 hours0
First 72 hours2
Strongest subsequent eventM5.4
M4.32025-08-04 14:40:48 UTC108.3 km10 km N of Akkeshi, Japan M4.22025-08-04 14:40:48 UTC108.3 kmHOKKAIDO, JAPAN REGION M5.42025-08-12 09:11:09 UTC77.3 km79 km SSE of Kushiro, Japan M5.42025-08-12 09:11:09 UTC77.8 kmHOKKAIDO, JAPAN REGION M5.22025-08-12 09:11:09 UTC70.3 kmHokkaido, Japan Region M5.42025-08-12 09:11:13 UTC91.9 kmHokkaido, Japan Region M4.12025-08-12 13:08:30 UTC86.9 kmHOKKAIDO, JAPAN REGION M4.32025-08-12 14:31:42 UTC90.5 kmHOKKAIDO, JAPAN REGION M4.22025-08-12 22:50:30 UTC103.7 kmKURIL ISLANDS M4.22025-08-23 09:36:30 UTC98.0 kmOFF COAST OF HOKKAIDO, JAPAN M4.82025-08-28 09:50:05 UTC73.5 kmOff Coast of Hokkaido, Japan M4.52025-08-28 09:50:09 UTC72.5 km47 km SE of Nemuro, Japan

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#12
Earlier events M≥470
Earlier events M≥514
Compared since2025-02-02

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

Strongest earlier events

M6.22025-06-21 21:23:17 UTC92.1 km88 km ESE of Nemuro, Japan M6.22025-06-18 23:08:05 UTC88.3 km90 km SE of Nemuro, Japan M6.12025-06-21 21:23:17 UTC92.1 km88 km ESE of Nemuro, Japan M6.12025-06-21 21:23:17 UTC92.2 kmOFF COAST OF HOKKAIDO, JAPAN M6.12025-05-31 08:37:15 UTC88.9 km83 km SSE of Kushiro, Japan

Stats (last 24h)

Global (24h)
511
Country (24h)
—
—
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