Overall Green Earthquake in Japan on 26 Aug 2026 19:21 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve awareness, information exchange and coordination in the first phase after major sudden-onset disasters.

M 5.6 in Japan on 26 Aug 2026 19:21 UTC

Hazard models

Rapid Impact

Shakemap

Tsunami

Event summary

This earthquake is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

Earthquake Magnitude:	5.6M
Depth:	16 Km
Lat/Lon:	38.1821 , 143.8447
Event Date:	26 Aug 2026 19:21 UTC 27 Aug 2026 05:21 Local
Exposed Population:	100 thousand in MMI III
Source:	NEIC us7000tc18
Inserted at:	27 Aug 2026 16:15 UTC
INFORM Coping capacity of the alert score:	1.1 (Japan)

GDACS Score

For more info on GDACS score click here.

	Earthquake (Shakemap)		GDACS score
NEIC	0		0
us7000tc18	Scaled population (raster)	0
	C1 shakemap	0
	C2 shakemap	0
	Country Vulnerability	0
	INFORM_normalised	0
	Score no CC	0

Maximum expected impact using different data sources.

ShakeMap is a product of the USGS Earthquake Hazards Program in conjunction with the regional seismic networks. ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.

Episode Timeline

ID	Level	Score	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
1729395		0	26 Aug 2026 19:21	5.6M, 10km	2.95	N/A (in MMI>=VII)		00:18	NEIC
1729589		0	26 Aug 2026 19:21	5.6M, 16km	2.91	N/A (in MMI>=VII)		20:53	NEIC

The episode that generated the alert; the next major evaluations beyond 12 hours will not trigger additional alerts.

The episode that has the last updated information.

* The max MMI detected for sources having shakemaps;
** The population detected in MMI>=7 for episode with shakemap or in a 100km radius;
*** The tsunami max height.

Exposed population

The earthquake happened in Japan ,of Tohoku (population 77) . The alertlevel for this event is GREEN

Intensity	Population
	no people

Shakemaps Timeline

Shake id #	episodeid	Lat/Lon	Magnitude	Depth	Max MMI	Date shake (UTC)	Delay (hh:mm)
1	1729395	143.848/38.129	5.6	10	3.02	26 Aug 2026 19:46	00:24	(new episode)
2	1729395	143.848/38.129	5.6	10	3.02	26 Aug 2026 19:51	00:30	(upd of #1)
3	1729395	143.848/38.129	5.6	10	3.024	26 Aug 2026 21:26	02:04	(upd of #2)
4	1729589	143.845/38.182	5.6	16.1	3.059	28 Aug 2026 02:06	1d 06:44	(new episode)

Affected Provinces

Intensity	Region Province	Country	Population
	Tohoku	Japan	33000 people

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Ports

Intensity	Name	LOCODE	Country	Distance
	Yamada		Japan	217 km
	Miyako	JPMYK	Japan	229 km

More information

For a full list of available products related to this event, please refer to the GDACS Resources page.

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