Overall Green Earthquake alert in Japan on 22 May 2018 12:55 UTC

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 4.6 in Japan on 22 May 2018 12:55 UTC

Hazard models

EQ parameters

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:	4.6M
Depth:	35 Km
Lat/Lon:	35.6901 , 140.7717
Event Date:	22 May 2018 12:55 UTC 22 May 2018 21:55 Local
Exposed Population:	17530000 people within 100km
Source:	NEIC us1000e9wa
Inserted at:	22 May 2018 13:24 UTC
INFORM Coping capacity of the alert score	1.5 (Japan)

GDACS Score

For more info on GDACS alert score click here.

	Earthquake		GDACS score
NEIC	0		0
us1000e9wa	Scaled population (vector)	6.87
	C1 earthquake	0.73
	C2 earthquake	-0.22
	Country Vulnerability	-0.71
	INFORM_normalised	0.57

Maximum expected impact using different data sources.

Episode Timeline

ID	Alert	Score	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
1211556		0	22 May 2018 12:55	4.6M, 35km	N/A	17.5 million (in 100km)		00:28	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 , Region of Kanto (population 38,543,000) . The nearest places are Choshi, Tokawacho, Inuwaka, Asahi Yokaichiba, Yatabe, Okunoya, Omigawa, Yokoshiba, Tako, Hasunuma, and Kawasaki.

Radius	Population
100 km	17.5 million people
75 km	5.5 million people
50 km	1.2 million people
20 km	210000 people
10 km	97000 people
5 km	9600 people
2 km	<1000 people

Affected Provinces

Region Province	Country	Population
Kanto	Japan	38.5 million people

Affected populated places

Name	Region Province	Country	City class	Population	Distance
Choshi	Chiba	Japan	City	84000 people	7 km
Tokawacho	Chiba	Japan	Village	-	8 km
Inuwaka	Chiba	Japan	Village	-	8 km
Asahi Yokaichiba	Chiba	Japan	Village	-	11 km
Yatabe	Ibaraki	Japan	Village	-	12 km
Okunoya	Ibaraki	Japan	Village	-	23 km
Omigawa	Chiba	Japan	City	25000 people	23 km
Yokoshiba	Chiba	Japan	Village	-	27 km
Tako	Chiba	Japan	City	-	28 km
Hasunuma	Chiba	Japan	Village	-	28 km
Kashima	Ibaraki	Japan	Village	65000 people	33 km
Kyuchu	Ibaraki	Japan	Village	-	33 km
Obunatsu	Ibaraki	Japan	Village	-	33 km
Idako	Ibaraki	Japan	Village	-	34 km
Naruto	Chiba	Japan	City	22000 people	34 km
Katakai	Chiba	Japan	City	-	35 km
Ino	Chiba	Japan	Village	-	36 km
Narita	Chiba	Japan	City	100000 people	36 km
Ushibori	Ibaraki	Japan	Village	-	37 km
Togane	Chiba	Japan	Village	55000 people	38 km
Koya	Ibaraki	Japan	Village	-	38 km
Kansaki	Chiba	Japan	Village	-	41 km
Omi	Ibaraki	Japan	Village	-	41 km
Aotsuka	Ibaraki	Japan	Village	-	42 km
Itako	Ibaraki	Japan	Village	25000 people	42 km
Nekoya	Ibaraki	Japan	Village	-	42 km
Negoya	Ibaraki	Japan	Village	-	42 km
Narage	Ibaraki	Japan	Village	-	42 km
Hamatsuga	Ibaraki	Japan	Village	-	43 km
Namegawa	Chiba	Japan	Village	-	43 km
Aso	Ibaraki	Japan	Village	-	44 km
Aonuma	Ibaraki	Japan	Village	-	45 km
Koda	Ibaraki	Japan	Village	-	45 km
Oami	Chiba	Japan	Village	-	46 km
Yoshikawa	Ibaraki	Japan	Village	-	46 km
Kyochikama	Ibaraki	Japan	Village	-	47 km
Yamada	Ibaraki	Japan	Village	-	47 km
Fuda	Ibaraki	Japan	Village	-	47 km
Oshita	Ibaraki	Japan	Village	-	48 km
Taiyo	Ibaraki	Japan	Village	-	48 km
Sakura	Chiba	Japan	City	180000 people	49 km
Obata	Ibaraki	Japan	Village	-	50 km
Muyokama	Ibaraki	Japan	Village	-	50 km
Ryugasaki	Chiba	Japan	Village	85000 people	50 km
Kubo	Ibaraki	Japan	Village	-	50 km
Edosaki	Ibaraki	Japan	Village	21000 people	50 km
Inoue	Ibaraki	Japan	Village	-	50 km
Oyama	Ibaraki	Japan	Village	-	51 km
Kofunatsu	Ibaraki	Japan	Village	-	51 km
Ichinomiya	Chiba	Japan	Village	-	51 km
Mobara	Chiba	Japan	City	96000 people	52 km
Dainigorisawa	Ibaraki	Japan	Village	-	52 km
Chiba-nyutaun	Chiba	Japan	Village	-	53 km
Takata	Ibaraki	Japan	Village	-	53 km
Yaida	Ibaraki	Japan	Village	-	54 km
Owana	Ibaraki	Japan	Village	-	55 km
Otake	Ibaraki	Japan	Village	-	55 km
Aruga	Ibaraki	Japan	Village	-	56 km
Kihara	Ibaraki	Japan	Village	-	56 km
Ryugaski	Ibaraki	Japan	Village	-	57 km
Iina	Ibaraki	Japan	Village	-	58 km
Hokota	Ibaraki	Japan	Village	28000 people	59 km
Chonan	Chiba	Japan	Village	-	59 km
Kamiyama	Ibaraki	Japan	Village	-	59 km
Owada	Ibaraki	Japan	Village	-	59 km
Kashiwazaki	Ibaraki	Japan	Village	-	59 km
Fukawa	Ibaraki	Japan	Village	-	59 km
Katsuori	Ibaraki	Japan	Village	-	59 km
Chiba	Chiba	Japan	Major city	920000 people	59 km
Ambo	Ibaraki	Japan	Village	-	59 km
Sakihama	Ibaraki	Japan	Village	-	60 km
Ohara	Chiba	Japan	City	20000 people	60 km
Omori	Chiba	Japan	Village	-	61 km
Torinosu	Ibaraki	Japan	Village	-	61 km
Noda	Ibaraki	Japan	Village	-	61 km
Hangu	Ibaraki	Japan	Village	-	61 km
Shishikura	Ibaraki	Japan	Village	-	62 km
Ishiyatsudo	Ibaraki	Japan	Village	-	62 km
Wakaguri	Ibaraki	Japan	Village	-	63 km
Tonouchi	Ibaraki	Japan	Village	-	63 km
Jikkoku	Ibaraki	Japan	Village	-	63 km
Asahi	Ibaraki	Japan	Village	-	64 km
Goi	Chiba	Japan	Village	-	64 km
Iioka	Ibaraki	Japan	Village	-	64 km
Ikku	Ibaraki	Japan	Village	-	64 km
Kamigama	Ibaraki	Japan	Village	-	65 km
Funaki	Ibaraki	Japan	Village	-	65 km
Tamatsukuri	Ibaraki	Japan	Village	-	65 km
Ushiku	Ibaraki	Japan	Village	79000 people	65 km
Ushiku	Chiba	Japan	Village	-	65 km
Ogawa	Ibaraki	Japan	Village	-	65 km
Kai-Tamari	Ibaraki	Japan	Village	-	66 km
Momiji	Ibaraki	Japan	Village	-	66 km
Arakawa-Oki	Ibaraki	Japan	Village	-	67 km
Fujishiro	Ibaraki	Japan	Village	33000 people	67 km
Oyagaw	Ibaraki	Japan	Village	-	67 km
Miyata	Ibaraki	Japan	Village	-	68 km
Nagasu	Ibaraki	Japan	Village	-	68 km
Kamagaya	Chiba	Japan	City	110000 people	69 km
Natsumi	Ibaraki	Japan	Village	-	69 km

see full list

Critical infrastructure

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

Airports

Name	IATA Code	Elevation (m)	Usage	Runway type	IFR	Runway Length (ft)	Distance
Tokyo Narita International	NRT	42	Civ.	Paved	Yes	13100	36 km
Ryugasaki South		2				0	52 km
Ryugasaki		2				0	54 km
Shimoshizu		30				0	56 km
Hyakuri		32	Mil.	Paved	Yes	8800	63 km
		26				0	65 km
Shimofusa		30	Civ.	Paved	Yes	7300	70 km
Kisarazu		3	Mil.	Paved	Yes	6000	84 km
Tokyo Haneda International	HND	7	Civ.	Paved	Yes	9800	91 km
Chiba-ken		19				0	94 km

Ports

Name	LOCODE	Country	Distance
Choshi	JPCHO	Japan	7 km
Kashima	JPKSM	Japan	24 km
Chiba	JPCHB	Japan	61 km
Anegasaki	JPANE	Japan	61 km
Goi	JPGOI	Japan	63 km
Katunan Ko		Japan	71 km
Katsuura Ko		Japan	75 km
Kisarazu	JPKZU	Japan	84 km
Ogasawara	JPOGA	Japan	89 km
Hitachi	JPHTC	Japan	90 km
Tokyo	JPTYO	Japan	92 km
Kawasaki	JPKWS	Japan	93 km

Dams

Reservoir	Dam Name	River	Year	Distance
Kasumigaura	Kasumigaura-Kaihatsu	Tonegawa	1995	38 km
Yamakura	Yamakura	Yamakuragawa	1964	62 km
Takatakiko	Takataki	Yorogawa	1990	68 km
Kameyamako	Kameyama	Obitsugawa	1980	81 km
Jajanboike	Kozogawa	Kozogawa	1985	88 km
Kori	Kori	Korigawa	1972	90 km

Nuclear plants

Name	Country	Reactors	Distance
TOKAI	JAPAN	3	87 km

More information

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

Disclaimer
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