M5.1 Earthquake near Off East Coast of Honshu, Japan

UTC time: 2026-08-28 23:10:32 UTC Local time: —

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

M5.1

Depth: 10.0 km
Source: GFZ

Off East Coast of Honshu, Japan

Map

About this earthquake

A magnitude M5.1 earthquake was recorded near Off East Coast of Honshu, Japan on August 28, 2026 at 23:10 UTC. The hypocenter lay relatively close to the surface at around 10 km, increasing how strongly it was felt. Events of this size can cause damage near the epicenter.

The event was recorded by GFZ.

Details

2ab226de70d4c8661853c53f62845a379fd3ff53

Magnitude

M5.1

Depth

10.0 km

UTC time

2026-08-28 23:10:32 UTC

Local time

—

Country

—

Source

gfz

Coordinates

39.61000, 143.27000

Temperature

22.7°C

Depth profile

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

Tectonic context

Located on the Okhotsk Plate.

Near the boundary Pacific ↔ Okhotsk · about 44 km away

Nearby population centers

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

PlaceDistanceDirectionPopulation

Miyako113.9 kmW51'150

Hachinohe180.2 kmNW239'046

Sendai256.0 kmSW1'096'704

GeoNames · CC BY 4.0

Volcanoes nearby

Iwatesan

Distance: 196 km ·Complex ·Elevation: 2'038 m ·Last eruption: 1919 ·Japan
Hachimantai

Distance: 210 km ·Stratovolcano ·Elevation: 1'613 m ·Last eruption: -5350 ·Japan
Akita-Komagatake

Distance: 212 km ·Stratovolcano(es) ·Elevation: 1'637 m ·Last eruption: 1971 ·Japan
Akita-Yakeyama

Distance: 218 km ·Stratovolcano ·Elevation: 1'366 m ·Last eruption: 1997 ·Japan
Kurikomayama

Distance: 225 km ·Stratovolcano ·Last eruption: 1950 ·Japan
Towada

Distance: 227 km ·Caldera ·Elevation: 1'011 m ·Last eruption: 915 ·Japan

Subsequent earthquakes nearby

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

First 6 hours1

First 24 hours1

First 72 hours1

Strongest subsequent eventM5.1

M5.12026-08-28 23:10:34 UTC14.7 kmOFF EAST COAST OF HONSHU, JAPAN M3.92026-09-04 03:52:30 UTC112.8 kmNEAR EAST COAST OF HONSHU, JAPAN M4.52026-09-05 00:22:45 UTC117.5 kmOFF EAST COAST OF HONSHU, JAPAN M4.92026-09-06 05:15:46 UTC126.9 km118 km ENE of Kuji, Japan

Comparison of seismic sources

2 sources currently report magnitudes from M5.1 to M5.2.

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

SourceMagnitudeDepthPosition difference

RESIFM5.210.0 km42.4 km

GFZM5.110.0 km0.0 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#221

Earlier events M≥4532

Earlier events M≥5290

Compared since2025-01-05

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

Strongest earlier events

M7.62026-04-20 07:52:57 UTC53.6 kmOff East Coast of Honshu, Japan M7.52026-06-24 22:30:10 UTC114.5 kmNear East Coast of Honshu, Japan M7.52026-06-24 22:30:10 UTC113.9 kmNear East Coast of Honshu, Japan M7.52026-04-20 07:52:59 UTC12.2 kmOff east coast of Honshu, Japan [Sea: Japan] M7.42026-06-24 22:30:10 UTC115.2 kmNear East Coast of Honshu, Japan

Stats (last 24h)

Global (24h)

506

Country (24h)

—

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