Overall Green Earthquake alert in Japan from 21 May 2023 22:20 UTC to 22:20

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

M 5.5 in Japan from 21 May 2023 22:20 UTC to 22:20

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:	5.5M
Depth:	189.392 Km
Lat/Lon:	29.8307 , 129.1834
Event Date:	21 May 2023 22:20 UTC 22 May 2023 07:20 Local
Exposed Population:	1 thousand in MMI III
Source:	NEIC us6000kdrq
Inserted at:	21 May 2023 22:32 UTC
INFORM Coping capacity of the alert score:	1.1 (Japan)

GDACS Score

For more info on GDACS alert score click here.

	Earthquake (Shakemap)		GDACS score
NEIC	0		0
us6000kdrq	Scaled population (raster)	0
	C1 shakemap	0
	C2 shakemap	0
	Country Vulnerability	0
	INFORM_normalised	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	Alert	Score	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
1506930		0	21 May 2023 22:20	5.5M, 189.392km	3.46	N/A (in MMI>=VII)		00:12	NEIC
1507170		0	21 May 2023 22:20	5.5M, 184km	3.48	N/A (in MMI>=VII)		1d 04:04	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 Kyushu (population 15,928) . 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	1506930	129.183/29.831	5.5	189.4	3.46	21 May 2023 22:36	00:16	(new episode)
2	1506930	129.183/29.831	5.5	189.4	3.46	21 May 2023 22:45	00:25	(upd of #1)
3	1506930	129.183/29.831	5.5	189.4	3.46	22 May 2023 00:25	02:05	(upd of #2)
4	1506930	129.183/29.831	5.5	189.4	3.46	22 May 2023 22:41	1d 00:21	(upd of #3)
5	1507170	129.129/29.84	5.5	184	3.485	23 May 2023 02:41	1d 04:21	(new episode)

Affected Provinces

Intensity	Region Province	Country	Population
	Kyushu	Japan	39000 people

Affected populated places. Areas of interest

Name	Region Province	Country	City class	Population	Distance
Naon	Okinawa	Japan	Village	-	165 km
Sukomo	Okinawa	Japan	Village	-	188 km
Makurazuki	Kagoshima	Japan	City	-	191 km
Izashiki	Kagoshima	Japan	Village	-	201 km
Suzuyama	Kagoshima	Japan	Village	-	220 km
Yokura	Kagoshima	Japan	Village	-	220 km
Yanagatai	Kagoshima	Japan	Village	-	223 km
Sedo	Kagoshima	Japan	Village	-	223 km

see full list

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
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.