Overall Green Earthquake alert in Japan on 30 Aug 2020 05:37 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 30 Aug 2020 05:37 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:	71.2 Km
Lat/Lon:	36.2149 , 139.7113
Event Date:	30 Aug 2020 05:37 UTC 30 Aug 2020 14:37 Local
Exposed Population:	39810000 people within 100km
Source:	NEIC us7000beye
Inserted at:	30 Aug 2020 06:16 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
us7000beye	Scaled population (vector)	7.64
	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
1329241		0	30 Aug 2020 05:37	4.6M, 71.2km	N/A	39.8 million (in 100km)		00:39	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 Nogi, Koga, Kami-Namai, Kozutsumi, Yagyu, Honden, Fujioka, Hirunuma, Mamada, Minami-Izumi, and Yokohama.

Radius	Population
100 km	39.8 million people
75 km	31.1 million people
50 km	11.8 million people
20 km	1.2 million people
10 km	240000 people
5 km	100000 people
2 km	20000 people

Affected Provinces

Region Province	Country	Population
Kanto	Japan	38.5 million people

Affected populated places

Name	Region Province	Country	City class	Population	Distance
Nogi	Tochigi	Japan	Village	27000 people	1 km
Koga	Ibaraki	Japan	City	57000 people	2 km
Kami-Namai	Tochigi	Japan	Village	-	4 km
Kozutsumi	Ibaraki	Japan	Village	-	5 km
Yagyu	Saitama	Japan	Village	-	5 km
Honden	Saitama	Japan	Village	-	5 km
Fujioka	Tochigi	Japan	Village	18000 people	7 km
Hirunuma	Tochigi	Japan	Village	-	7 km
Mamada	Tochigi	Japan	Village	-	8 km
Minami-Izumi	Tochigi	Japan	Village	-	8 km
Kurihashi	Saitama	Japan	Village	28000 people	8 km
Itakura	Gunma	Japan	Village	-	9 km
Koike	Tochigi	Japan	Village	-	9 km
Kami-Wada	Ibaraki	Japan	Village	-	9 km
Kita-Hirano	Saitama	Japan	Village	-	9 km
Mizukake	Tochigi	Japan	Village	-	9 km
Nire	Ibaraki	Japan	Village	-	10 km
Morokawa	Ibaraki	Japan	Village	-	10 km
Nishioka	Gunma	Japan	Village	-	10 km
Mitagaya	Saitama	Japan	Village	-	10 km
Tsukazaki	Ibaraki	Japan	Village	-	11 km
Takei	Ibaraki	Japan	Village	-	11 km
Makado	Tochigi	Japan	Village	-	12 km
Numakage	Ibaraki	Japan	Village	-	12 km
Momiya	Gunma	Japan	Village	-	12 km
Minami-Obayashi	Tochigi	Japan	Village	-	12 km
Amagaya	Tochigi	Japan	Village	-	12 km
Shizuka	Tochigi	Japan	Village	-	13 km
Shinjuku-Shinden	Ibaraki	Japan	Village	-	13 km
Tomida	Tochigi	Japan	Village	-	13 km
Narita-Shinden	Ibaraki	Japan	Village	-	14 km
Onna	Ibaraki	Japan	Village	-	14 km
Oyama	Tochigi	Japan	City	150000 people	14 km
Doyobu	Ibaraki	Japan	Village	-	14 km
Takahagi	Tochigi	Japan	Village	-	14 km
Akoda	Gunma	Japan	Village	-	14 km
Togawa	Saitama	Japan	Village	-	14 km
Sakunoya	Ibaraki	Japan	Village	-	14 km
Shinzato	Tochigi	Japan	Village	-	14 km
Sakai	Ibaraki	Japan	Village	26000 people	15 km
Okizawa	Tochigi	Japan	Village	-	15 km
Washimiya	Saitama	Japan	Village	34000 people	15 km
Omuro	Saitama	Japan	Village	-	15 km
Sekiyado	Chiba	Japan	Village	30000 people	15 km
Hiratsuka	Ibaraki	Japan	Village	-	16 km
Sukage	Saitama	Japan	Village	-	16 km
Tatebayashi	Gunma	Japan	Village	81000 people	16 km
Suginoya	Ibaraki	Japan	Village	-	17 km
Kuki	Saitama	Japan	Village	72000 people	17 km
Kanokubo	Ibaraki	Japan	Village	-	17 km
Kishai	Saitama	Japan	Village	-	17 km
Aoyagi	Gunma	Japan	Village	-	17 km
Sunayama	Saitama	Japan	Village	-	18 km
Ozanuki	Gunma	Japan	Village	-	18 km
Nakamura	Tochigi	Japan	Village	-	18 km
Onodera	Tochigi	Japan	Village	-	18 km
Hachimanzawa	Tochigi	Japan	Village	-	18 km
Toshima	Saitama	Japan	Village	-	18 km
Oigo	Ibaraki	Japan	Village	-	19 km
Konosu	Saitama	Japan	Village	82000 people	19 km
Shobu	Saitama	Japan	Village	-	19 km
Kami-Shingo	Saitama	Japan	Village	-	19 km
Sekimoto	Ibaraki	Japan	Village	-	19 km
Hanekawa	Tochigi	Japan	Village	-	19 km
Konaka	Tochigi	Japan	Village	-	19 km
Arai	Saitama	Japan	Village	-	20 km
Hinata	Gunma	Japan	Village	-	20 km
Hinokuchi	Saitama	Japan	Village	-	20 km
Tanuma	Tochigi	Japan	Village	28000 people	20 km
Shinden	Gunma	Japan	Village	-	20 km
Minagawa-Jonai	Tochigi	Japan	Village	-	20 km
Emura	Ibaraki	Japan	Village	-	20 km
Kurokoma	Ibaraki	Japan	Village	-	20 km
Otake	Saitama	Japan	Village	-	21 km
Saheita-Shinden	Ibaraki	Japan	Village	-	21 km
Goshonomiya	Tochigi	Japan	Village	-	21 km
Kutsukake	Ibaraki	Japan	Village	-	21 km
Shimo-Sudo	Saitama	Japan	Village	-	22 km
Hanamigaoka	Tochigi	Japan	Village	-	22 km
Chizuka	Tochigi	Japan	Village	-	22 km
Sairaoka	Saitama	Japan	Village	-	22 km
Kawasaki	Tochigi	Japan	Village	-	22 km
Uruido	Saitama	Japan	Village	-	22 km
Mujinazuka	Gunma	Japan	Village	-	22 km
Nobushimo	Tochigi	Japan	Village	-	22 km
Koganei	Tochigi	Japan	Village	-	23 km
Saitama	Saitama	Japan	Major city	1.1 million people	23 km
Ichiba	Saitama	Japan	Village	-	23 km
Hoshubana	Chiba	Japan	Village	-	23 km
Shimotsuma	Ibaraki	Japan	Village	37000 people	23 km
Hojubana	Saitama	Japan	Village	-	23 km
Shimo-Ezure	Ibaraki	Japan	Village	-	24 km
Ienaka	Tochigi	Japan	Village	-	24 km
Matate	Ibaraki	Japan	Village	-	24 km
Zodo	Ibaraki	Japan	Village	-	24 km
Wakayagi	Ibaraki	Japan	Village	-	24 km
Ishiuchi	Gunma	Japan	Village	-	24 km
Mazaka	Tochigi	Japan	Village	-	24 km
Terakube	Tochigi	Japan	Village	-	24 km
Shimo-Nodono	Ibaraki	Japan	Village	-	25 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
Onishi		20				0	21 km
Chiba-ken		19				0	24 km
Shimo Kolzumi		30				0	29 km
Honda		12				0	31 km
Suzumenomiya		82				0	32 km
Utsunomiya	QUT	102	Civ.	Paved	Yes	5500	36 km
		26				0	48 km
Iruma		91	Mil.	Paved	Yes	6500	50 km
Shimofusa		30	Civ.	Paved	Yes	7300	54 km
Ryugasaki		2				0	58 km
Ryugasaki South		2				0	61 km
Yokota AFB	OKO	139	Mil.	Paved	Yes	11000	61 km
Chofu		41	Civ.	Paved	No	3200	63 km
Tachikawa		95				0	63 km
Hyakuri		32	Mil.	Paved	Yes	8800	63 km
Tokyo Haneda International	HND	7	Civ.	Paved	Yes	9800	74 km
Shimoshizu		30				0	74 km
Otawara		201				0	78 km
Tokyo Narita International	NRT	42	Civ.	Paved	Yes	13100	79 km
Katsner AAF		109	Civ.	Paved	No	1900	83 km
Yokohama	YOK	unknown				0	83 km
Atsugi	NJA	62	Mil.	Paved	Yes	7900	88 km
Kisarazu		3	Mil.	Paved	Yes	6000	92 km

Ports

Name	LOCODE	Country	Distance
Tokyo	JPTYO	Japan	56 km
Ogasawara	JPOGA	Japan	60 km
Katunan Ko		Japan	65 km
Kawasaki	JPKWS	Japan	76 km
Anegasaki	JPANE	Japan	76 km
Chiba	JPCHB	Japan	77 km
Goi	JPGOI	Japan	84 km
Yokohama	JPYOK	Japan	85 km
Hitachi	JPHTC	Japan	88 km
Neghisi	JPNGI	Japan	91 km
Kisarazu	JPKZU	Japan	94 km
Kashima	JPKSM	Japan	95 km

Dams

Reservoir	Dam Name	River	Year	Distance
Yanakako	Wataraseyusuichi	Watarasegawa	1989	3 km
Miyukiko	Gongendochosetsuchi	Nakagawa	1991	11 km
Kusakiko	Kusaki	Watarasegawa	1976	48 km
Miyazawako	Miyazawatameike	Koazegawa	1941	51 km
Sayamako	Yamaguchi	Tamagawa	2002	55 km
Tamako	Murayamashimo	Tamagawa	2008	56 km
Tamako	Murayamakami	Tamagawa	1924	56 km
Chuzenjiko	Chuzenji	Daiyagawa	1998	61 km
Naguriko	Arima	Arimagawa	1985	61 km
Kannako	Shimokubo	Kannagawa	1968	63 km
Jajanboike	Kozogawa	Kozogawa	1985	65 km
Makabechoseichi	Makabe	Tonegawa	1928	67 km
Sonoharako	Sonohara	Katashinagawa	1965	67 km
Higashikoyako	Nishiarakawa	Nishiarakawa	1967	68 km
Imaichichoseichi	Imaichi	Togawa	1988	68 km
Kuriyamachoseichi	Kuriyama	Nebesawagawa	1988	71 km
Terayama	Terayama	Miyakawa	1984	72 km
Narusawako	Narusawa	Harunashirakawa	1950	72 km
Kurobe	Kurobe	Kinugawa	1912	73 km
Oshioko	Oshio	Nanmokugawa	1968	75 km
Marunumako	Marunuma	Otakigawa	1931	75 km
Kawamatako	Kawamata	Kinugawa	1966	76 km
Okutamako	Ogohchi	Tamagawa	1957	76 km
Yashioko	Kawaji	Kunugawa	1983	76 km
Ikariko	Ikari	Ojikagawa	1956	76 km
Kasumigaura	Kasumigaura-Kaihatsu	Tonegawa	1995	77 km
Chichibuko	Futase	Arakawa	1961	79 km
Nyuko	Nyu	Nyukawa	1952	79 km
Tsukuiko	Shiroyama	Sagamigawa	1964	80 km
Sagamiko	Sagami	Sagamigawa	1947	81 km
Shiobara	Shiobara	Hokigawa	1978	83 km
Miyagaseko	Miyagase	Nakatsugawa	2001	85 km
Tanbarako	Tanbara	Hocchigawa	1981	86 km
Sabigawa	Sabigawa	Sabigawa	1994	88 km
Ono	Ono	Yatagawa	1914	89 km
Fujiwarako	Fujiwara	Tonegawa	1957	89 km
Yamakura	Yamakura	Yamakuragawa	1964	89 km
Akayako	Aimata	Akayagawa	1959	92 km
Naramatako	Naramata	Naramatagawa	1990	93 km
Dogenko	Sudagai	Tonegawa	1955	93 km
Hiroseko	Hirose	Fuefukigawa	1974	95 km
Okutoneko	Yagisawa	Tonegawa	1967	97 km
Miyamako	Miyama	Nakagawa	1973	99 km
Otsumata	Otsumata	Otsumatagawa	1968	100 km

Nuclear plants

Name	Country	Reactors	Distance
TOKAI	JAPAN	3	85 km

More information

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

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