Overall Green Earthquake alert in Japan on 16 May 2021 06:41 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 16 May 2021 06:41 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:	10 Km
Lat/Lon:	37.6307 , 141.5943
Event Date:	16 May 2021 06:41 UTC 16 May 2021 15:41 Local
Exposed Population:	2150000 people within 100km
Source:	NEIC us7000e3hs
Inserted at:	16 May 2021 07:09 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
us7000e3hs	Scaled population (vector)	5.43
	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
1375411		0	16 May 2021 06:41	4.6M, 10km	N/A	2.2 million (in 100km)		00:28	NEIC
1375412		0	16 May 2021 06:41	4.5M, 39.34km	N/A	2.5 million (in 100km)		00:38	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 Kayahama, Minami-Ibi, Onaba, Kiyohashi, Takahira, Odaka, Futaba, Namie, Isobe, Kashima, and Sendai.

Radius	Population
100 km	2.2 million people
75 km	130000 people
50 km	<1000 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
Kayahama	Fukushima	Japan	Village	-	51 km
Minami-Ibi	Fukushima	Japan	Village	-	52 km
Onaba	Fukushima	Japan	Village	-	52 km
Kiyohashi	Fukushima	Japan	Village	-	53 km
Takahira	Fukushima	Japan	Village	-	53 km
Odaka	Fukushima	Japan	Village	-	54 km
Futaba	Fukushima	Japan	Village	-	55 km
Namie	Fukushima	Japan	Village	22000 people	55 km
Isobe	Fukushima	Japan	Village	-	55 km
Kashima	Fukushima	Japan	Village	-	56 km
Onoda	Fukushima	Japan	Village	-	57 km
Kariyado	Fukushima	Japan	Village	-	57 km
Oragahama	Fukushima	Japan	Village	-	57 km
Umekawa	Fukushima	Japan	Village	-	58 km
Kita-Nagano	Fukushima	Japan	Village	-	58 km
Nakanouchi	Fukushima	Japan	Village	-	58 km
Haramachi	Fukushima	Japan	Village	47000 people	59 km
Koyamada	Fukushima	Japan	Village	-	59 km
Tachiya	Fukushima	Japan	Village	-	59 km
Haragama	Fukushima	Japan	Village	-	60 km
Oyama	Fukushima	Japan	Village	-	60 km
Okuma	Fukushima	Japan	Village	-	61 km
Bogoya	Fukushima	Japan	Village	-	61 km
Tomioka	Fukushima	Japan	Village	-	61 km
Nakumura	Fukushima	Japan	Village	-	61 km
Takatsudo	Fukushima	Japan	Village	-	62 km
Ogawara	Fukushima	Japan	Village	-	62 km
Tetsuzan	Fukushima	Japan	Village	-	63 km
Sekimori	Fukushima	Japan	Village	-	63 km
Shajigami	Fukushima	Japan	Village	-	64 km
Komagamine	Fukushima	Japan	Village	-	64 km
Tsurishi	Fukushima	Japan	Village	-	64 km
Kami-Shigeoka	Fukushima	Japan	Village	-	64 km
Kuroki	Fukushima	Japan	Village	-	64 km
Ide	Fukushima	Japan	Village	-	65 km
Otsubo	Fukushima	Japan	Village	-	65 km
Hirusone	Fukushima	Japan	Village	-	65 km
Suketsune	Fukushima	Japan	Village	-	65 km
Naraha	Fukushima	Japan	Village	-	66 km
Iso	Miyagi	Japan	Village	-	66 km
Kodeya	Fukushima	Japan	Village	-	67 km
Sugaya	Fukushima	Japan	Village	-	67 km
Sakamoto	Miyagi	Japan	Village	-	68 km
Kunugidaira	Fukushima	Japan	Village	-	68 km
Shimo-Kitabo	Fukushima	Japan	Village	-	69 km
Gomaisawa	Fukushima	Japan	Village	-	69 km
Futawatashi	Miyagi	Japan	Village	-	70 km
Kashiwabara	Fukushima	Japan	Village	-	70 km
Sendai	Miyagi	Japan	Major city	1 million people	93 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
Sendai	SDJ	5	Civ.	Paved	Yes	9800	82 km
Kasuminome		5				0	89 km
Matsushima		2	Civ.	Paved	Yes	8800	92 km

Ports

Name	LOCODE	Country	Distance
Soma	JPSMA	Japan	60 km
Ishinomaki	JPISM	Japan	90 km
Onagawa	JPONG	Japan	91 km
Shiogama	JPSGM	Japan	91 km
Onahama	JPONA	Japan	98 km

Dams

Reservoir	Dam Name	River	Year	Distance
Yokokawa	Yokokawa	Otagawa	1983	61 km
Takanokura	Takanokura	Mizunashigawa	1975	62 km
Sakashita	Sakashita	Okawaragawa	1973	64 km
Ogaki	Ogaki	Ukedogawa	1985	64 km
Tamanotameike	Tamano	Udagawa	1945	77 km
Tarumizuko	Tarumizu	Masudagawa	1976	90 km

Nuclear plants

Name	Country	Reactors	Distance
FUKUSHIMA-DAIICHI	JAPAN	6	55 km
FUKUSHIMA-DAINI	JAPAN	4	61 km
ONAGAWA	JAPAN	3	86 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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