Overall Green Earthquake alert in Japan on 23 Apr 2024 09:41 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 4.5 in Japan on 23 Apr 2024 09:41 UTC

Hazard models

Rapid Impact

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:	4.5M
Depth:	96.8 Km
Lat/Lon:	25.2385 , 124.7807
Event Date:	23 Apr 2024 09:41 UTC 23 Apr 2024 17:41 Local
Exposed Population:	100 thousand in MMI III
Source:	NEIC us6000mt5t
Inserted at:	25 Apr 2024 09:46 UTC
INFORM Coping capacity of the alert score	1.1 (Japan)

GDACS Score

For more info on GDACS alert score click here.

	Earthquake (Rapid Impact)		GDACS score
NEIC	0		0
us6000mt5t	Scaled population (vector)	0
	C1 rapid impact	0
	C2 rapid impact	0
	Country Vulnerability	0
	INFORM_normalised	0

Maximum expected impact using different data sources.

Episode Timeline

ID	Alert	Score	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
1567184		0	23 Apr 2024 09:41	4.5M, 96.8km	3.36	100 thousand (in 100km)		2d 00:05	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 off shore.

Radius	Population
100 km	58000 people
75 km	45000 people
50 km	no people
20 km	no people
10 km	no people
5 km	no people
2 km	no people

Affected Provinces

Affected populated places

Name	Region Province	Country	City class	Population	Distance
Kuninaka	Okinawa	Japan	Village	-	61 km
Ichimasui	Okinawa	Japan	Village	-	63 km
Karimata	Okinawa	Japan	Village	-	64 km
Shiokawa	Okinawa	Japan	Village	-	64 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
Shimojishima	SHI	16	Civ.	Paved	Yes	9800	59 km
		9				0	66 km
Hirara	MMY	45	Civ.	Paved	Yes	6500	72 km

Ports

Name	LOCODE	Country	Distance
Hirara		Japan	69 km
Myako Island		Japan	83 km

More information

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

Disclaimer
While we try everything to ensure accuracy, this information is purely indicative and should not be used for any decision making without alternate sources of information.
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