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

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 from 26 Aug 2026 19:21 UTC to 19:21

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:	10 Km
Lat/Lon:	38.1292 , 143.8477
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:	26 Aug 2026 19:39 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

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

Critical infrastructure

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

More information

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

Disclaimer - Copyright
While we try everything to ensure accuracy, this information is purely indicative and should not be used for any decision making without alternate sources of information.
The JRC is not responsible for any damage or loss resulting from the use of the information presented on this website.
The designations employed and the presentation of material on the map do not imply the expression of any opinion whatsoever on the part of the European Union concerning the legal status of any country, territory or area or of its authorities, or concerning the delimitation of its frontiers or boundaries.