Overall Green Earthquake alert in Japan on 23 Jan 2021 13:12 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 4.8 in Japan on 23 Jan 2021 13:12 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:	4.8M
Depth:	47.32 Km
Lat/Lon:	37.1493 , 141.5625
Event Date:	23 Jan 2021 13:12 UTC 23 Jan 2021 22:12 Local
Exposed Population:	690000 people within 100km
Source:	NEIC us7000d2p7
Inserted at:	23 Jan 2021 13:41 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
us7000d2p7	Scaled population (vector)	5.32
	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
1354441		0	23 Jan 2021 13:12	4.8M, 47.32km	N/A	700 thousand (in 100km)		00:29	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 Shimo-Kitabo, Yotsukura, Kami-Asamigawa, Ide, Kami-Shigeoka, Oragahama, Arayashik, Tomioka, Naraha, Omori, and Kami-Kamato.

Radius	Population
100 km	700000 people
75 km	340000 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
Kinki	Japan	22.2 million people

Affected populated places

Name	Region Province	Country	City class	Population	Distance
Shimo-Kitabo	Fukushima	Japan	Village	-	50 km
Yotsukura	Fukushima	Japan	Village	-	51 km
Kami-Asamigawa	Fukushima	Japan	Village	-	51 km
Ide	Fukushima	Japan	Village	-	52 km
Kami-Shigeoka	Fukushima	Japan	Village	-	52 km
Oragahama	Fukushima	Japan	Village	-	53 km
Arayashik	Fukushima	Japan	Village	-	53 km
Tomioka	Fukushima	Japan	Village	-	53 km
Naraha	Fukushima	Japan	Village	-	53 km
Omori	Fukushima	Japan	Village	-	54 km
Aratame	Fukushima	Japan	Village	-	55 km
Toyoma	Fukushima	Japan	Village	-	55 km
Bogoya	Fukushima	Japan	Village	-	55 km
Shimo-Takaku	Fukushima	Japan	Village	-	55 km
Takatsudo	Fukushima	Japan	Village	-	57 km
Ena	Fukushima	Japan	Village	-	57 km
Dozan	Fukushima	Japan	Village	-	58 km
Ohahama	Fukushima	Japan	Village	-	58 km
Taira	Fukushima	Japan	City	-	58 km
Nakayama	Fukushima	Japan	Village	-	58 km
Hokidaira	Fukushima	Japan	Village	-	58 km
Ogawara	Fukushima	Japan	Village	-	59 km
Futaba	Fukushima	Japan	Village	-	60 km
Shimo-Yata	Fukushima	Japan	Village	-	60 km
Okuma	Fukushima	Japan	Village	-	60 km
Otojiro	Fukushima	Japan	Village	-	61 km
Yoshima	Fukushima	Japan	Village	-	61 km
Kiyohashi	Fukushima	Japan	Village	-	62 km
Mishima	Fukushima	Japan	Village	-	62 km
Takahagi	Fukushima	Japan	Village	-	62 km
Sumiyoshi	Fukushima	Japan	Village	-	63 km
Namie	Fukushima	Japan	Village	22000 people	63 km
Gomaisawa	Fukushima	Japan	Village	-	63 km
Tsuzura	Fukushima	Japan	Village	-	63 km
Onoda	Fukushima	Japan	Village	-	64 km
Onahama	Fukushima	Japan	City	-	64 km
Eda	Fukushima	Japan	Village	-	65 km
Sekifune	Fukushima	Japan	Village	-	65 km
Onaba	Fukushima	Japan	Village	-	65 km
Odashiro	Fukushima	Japan	Village	-	65 km
Uzugawa	Fukushima	Japan	Village	-	66 km
Kariyado	Fukushima	Japan	Village	-	66 km
Obama	Fukushima	Japan	Village	-	67 km
Doyaba	Fukushima	Japan	Village	-	67 km
Shimo-Kawauchi	Fukushima	Japan	Village	-	67 km
Mabarado	Fukushima	Japan	Village	-	67 km
Tanebe	Fukushima	Japan	Village	-	68 km
Odaka	Fukushima	Japan	Village	-	68 km
Nakanouchi	Fukushima	Japan	Village	-	70 km
Goto	Fukushima	Japan	Village	-	70 km
Kami-Kamato	Fukushima	Japan	Village	-	70 km

see full list

Critical infrastructure

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

Ports

Name	LOCODE	Country	Distance
Onahama	JPONA	Japan	63 km
Soma	JPSMA	Japan	92 km

Dams

Reservoir	Dam Name	River	Year	Distance
Sakashita	Sakashita	Okawaragawa	1973	61 km
Ogaki	Ogaki	Ukedogawa	1985	73 km
Yokokawa	Yokokawa	Otagawa	1983	77 km
Takashibako	Takashiba	Samekawa	1961	77 km
Shitokiko	Shitoki	Shitokigawa	1983	80 km
Takanokura	Takanokura	Mizunashigawa	1975	80 km
Mizunuma	Mizunuma	Hanazonokawa	1966	86 km
Bobatako	Sengozawa	Kitasugawa	1974	96 km

Nuclear plants

Name	Country	Reactors	Distance
FUKUSHIMA-DAINI	JAPAN	4	50 km
FUKUSHIMA-DAIICHI	JAPAN	6	56 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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