Overall Green Earthquake alert in Japan on 18 Apr 2021 00:29 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 5.6 in Japan on 18 Apr 2021 00:29 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:	5.6M
Depth:	31.29 Km
Lat/Lon:	38.2705 , 141.8347
Event Date:	18 Apr 2021 00:29 UTC 18 Apr 2021 09:29 Local
Exposed Population:	2290000 people within 100km
Source:	NEIC us6000e2hf
Inserted at:	18 Apr 2021 06:23 UTC
INFORM Coping capacity of the alert score	1.5 (Japan)

GDACS Score

For more info on GDACS alert score click here.

	Earthquake (Shakemap)		GDACS score
NEIC	0		0
us6000e2hf	Scaled population (raster)	0
	C1 shakemap	-0.59
	C2 shakemap	0.53
	Country Vulnerability	0
	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
1370652		0	18 Apr 2021 00:29	5.6M, 51.69km	3.73	N/A (in MMI>=VII)		00:18	NEIC
1370719		0	18 Apr 2021 00:29	5.6M, 31.29km	4.01	N/A (in MMI>=VII)		05:54	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 Tohoku (population 9,984,608) . The nearest places are Niiyama, Oshika, Ayukawahama, Tomari, Futawatashi, Yoriiso, Kukunari, Aji, Oharahama, Kobuchi, and Sendai.

Radius	Population
100 km	2.3 million people
75 km	480000 people
50 km	59000 people
20 km	no people
10 km	no people
5 km	no people
2 km	no people

Affected Provinces

Region Province	Country	Population
Tohoku	Japan	10 million people
Kanto	Japan	38.5 million people
Chubu	Japan	5.2 million people
Hokkaido	Japan	5.8 million people

Affected populated places

Name	Region Province	Country	City class	Population	Distance
Niiyama	Miyagi	Japan	Village	-	27 km
Oshika	Miyagi	Japan	Village	-	28 km
Ayukawahama	Miyagi	Japan	Village	-	29 km
Tomari	Miyagi	Japan	Village	-	29 km
Futawatashi	Miyagi	Japan	Village	-	30 km
Yoriiso	Miyagi	Japan	Village	-	30 km
Kukunari	Miyagi	Japan	Village	-	30 km
Aji	Miyagi	Japan	Village	-	32 km
Oharahama	Miyagi	Japan	Village	-	32 km
Kobuchi	Miyagi	Japan	Village	-	32 km
Yagawa	Miyagi	Japan	Village	-	32 km
Terama	Miyagi	Japan	Village	-	33 km
Ikenohama	Miyagi	Japan	Village	-	33 km
Samenoura	Miyagi	Japan	Village	-	33 km
Koamikura	Miyagi	Japan	Village	-	34 km
Izushima	Miyagi	Japan	Village	-	35 km
Fukkiura	Miyagi	Japan	Village	-	35 km
Odomari	Miyagi	Japan	Village	-	37 km
Takenohama	Miyagi	Japan	Village	-	37 km
Nitoda	Miyagi	Japan	Village	-	37 km
Kuwahama	Miyagi	Japan	Village	-	37 km
Kitsunezaki	Miyagi	Japan	Village	-	37 km
Kumazawa	Miyagi	Japan	Village	-	37 km
Osu	Miyagi	Japan	Village	-	38 km
Tatsuhama	Miyagi	Japan	Village	-	38 km
Ommaehama	Miyagi	Japan	Village	-	38 km
Onagawahama	Miyagi	Japan	Village	-	39 km
Ohama	Miyagi	Japan	Village	-	40 km
Funagoshi	Miyagi	Japan	Village	-	41 km
Ogatsu	Miyagi	Japan	Village	-	41 km
Kotake	Miyagi	Japan	Village	-	42 km
Watanoha	Miyagi	Japan	Village	-	45 km
Ozashi	Miyagi	Japan	Village	-	47 km
Tsukihama	Miyagi	Japan	Village	-	47 km
Mizunuma	Miyagi	Japan	Village	-	47 km
Nagatsura	Miyagi	Japan	Village	-	47 km
Aikawa	Miyagi	Japan	Village	-	47 km
Kodaki	Miyagi	Japan	Village	-	48 km
Inai	Miyagi	Japan	Village	-	48 km
Terahama	Miyagi	Japan	Village	-	49 km
Onagawa	Miyagi	Japan	Village	-	50 km
Ishinomaki	Miyagi	Japan	City	120000 people	50 km
Moto-Funaba	Miyagi	Japan	Village	-	51 km
Higashi-Fukuda	Miyagi	Japan	Village	-	51 km
Iinogawa	Miyagi	Japan	Village	-	53 km
Saragai	Miyagi	Japan	Village	-	53 km
Kamata	Miyagi	Japan	Village	-	53 km
Kanomata	Miyagi	Japan	Village	-	53 km
Tomarihama	Miyagi	Japan	Village	-	53 km
Oritate	Miyagi	Japan	Village	-	54 km
Nojiri	Miyagi	Japan	Village	-	54 km
Aratohama	Miyagi	Japan	Village	-	55 km
Iwasaki	Miyagi	Japan	Village	-	55 km
Aramachi	Miyagi	Japan	Village	-	55 km
Yamane	Miyagi	Japan	Village	-	56 km
Natari	Miyagi	Japan	Village	-	56 km
Shizugawa	Miyagi	Japan	Village	-	56 km
Isatomae	Miyagi	Japan	Village	-	56 km
Ota	Miyagi	Japan	Village	-	57 km
Minato	Miyagi	Japan	Village	-	58 km
Sunaoshi	Miyagi	Japan	Village	-	58 km
Kitazawa	Miyagi	Japan	Village	-	58 km
Naka-Komatsu	Miyagi	Japan	Village	-	59 km
Shinden	Miyagi	Japan	Village	-	59 km
Hirobuchi	Miyagi	Japan	Village	-	59 km
Hamaichi	Miyagi	Japan	Village	-	59 km
Yanaizu	Miyagi	Japan	Village	-	59 km
Tsukihama	Miyagi	Japan	Village	-	60 km
Kagamiishi	Miyagi	Japan	Village	-	60 km
Shinzan	Miyagi	Japan	Village	-	60 km
Kesaiso	Miyagi	Japan	Village	-	60 km
Shirotori	Miyagi	Japan	Village	-	61 km
Haraigawa	Miyagi	Japan	Village	-	61 km
Takagi	Miyagi	Japan	Village	-	61 km
Wabuchi	Miyagi	Japan	Village	-	61 km
Ono	Miyagi	Japan	Village	-	61 km
Kami-Hazawa	Miyagi	Japan	Village	-	62 km
Kamimachi	Miyagi	Japan	Village	-	62 km
Honchi	Miyagi	Japan	Village	-	62 km
Maeyachi	Miyagi	Japan	Village	-	62 km
Koizumi	Miyagi	Japan	Village	-	62 km
Osawa	Miyagi	Japan	Village	-	64 km
Motoyoshi	Miyagi	Japan	Village	-	64 km
Hiraiso	Miyagi	Japan	Village	-	64 km
Oya	Miyagi	Japan	Village	-	64 km
Asatanuki	Miyagi	Japan	Village	-	64 km
Yoshizumi	Miyagi	Japan	Village	-	65 km
Inohana	Miyagi	Japan	Village	-	65 km
Magome	Miyagi	Japan	Village	-	66 km
Nigo	Miyagi	Japan	Village	-	66 km
Otsunagi	Miyagi	Japan	Village	-	66 km
Akuao	Miyagi	Japan	Village	-	66 km
Morinokoshi	Miyagi	Japan	Village	-	66 km
Taketani	Miyagi	Japan	Village	-	66 km
Kimazuka	Miyagi	Japan	Village	-	66 km
Matsuzaki	Miyagi	Japan	Village	-	66 km
Uenodai	Miyagi	Japan	Village	-	66 km
Oyanagi	Miyagi	Japan	Village	-	67 km
Maeya	Miyagi	Japan	Village	-	67 km
Kesennuma	Miyagi	Japan	Village	59000 people	67 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
Matsushima		2	Civ.	Paved	Yes	8800	56 km
Kasuminome		5				0	79 km
Sendai	SDJ	5	Civ.	Paved	Yes	9800	82 km
Ojojibara		70				0	90 km

Ports

Name	LOCODE	Country	Distance
Onagawa	JPONG	Japan	39 km
Ishinomaki	JPISM	Japan	48 km
Kesennuma Ko		Japan	70 km
Shiogama	JPSGM	Japan	70 km
Ofunato	JPOFT	Japan	88 km
Soma	JPSMA	Japan	91 km

Dams

Reservoir	Dam Name	River	Year	Distance
Naganuma	Naganuma	Hazamagawa	2005	77 km
Kejonuma	Kejonuma	Tajirigawa	1995	86 km
Tarumizuko	Tarumizu	Masudagawa	1976	88 km
Nanatsumoriko	Minamikawa	Minamikawa	1987	90 km
Nanakita	Nanakita	Nanakitagawa	1984	97 km
Okurako	Okura	Okuragawa	1961	99 km
Kamafusako	Kamafusa	Goishigawa	1970	100 km

Nuclear plants

Name	Country	Reactors	Distance
ONAGAWA	JAPAN	3	33 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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