Overall Green Earthquake alert in Volcano Islands, Japan Region on 16 Aug 2018 18:22 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 6.3 in Volcano Islands, Japan Region on 16 Aug 2018 18:22 UTC

Global Telecommunication Service

GTS (Global Telecommunication Service) is the official Warning and Alerting channel by the World Meteorological Organization (WMO) adopted by several Warning Organizations. As soon as a new GTS message regarding Tropical Cyclones(WT) or Tsunami(WE) the messages are processed and possibly assigned to the specific event. When a new GTS message is present an new tab in the specific event report page is present.The presence of a GTS message is shown in the homepage with a dedicated icon.

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Measurements Levels

SOURCE	GAUGE LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)

16/08 18:21 WEPA40RJTD161838

16/08 18:21 WEPA40RJTD161842

2018-08-16 18:21 message from JMA link

Original Message :

WEPA40 RJTD 161838

TSUNAMI BULLETIN ISSUED BY JMA AT 1838Z 16 AUG

ORIGIN TIME 1821Z 16 AUG

PRELIMINARY EPICENTER LAT 23.5 N. LON 143.4 E.

OGASAWARA ISLANDS REGION

FOCAL DEPTH 0 KM MAG 6.6

NO SIGNIFICANT TSUNAMI IS EXPECTED IN COASTAL AREAS OF JAPAN

NO FURTHER ACTION WILL BE TAKEN

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2018-08-16 18:21 message from JMA link

Key information extracted from original GTS message :

Evaluation

There is a very small possibility of a destructive local TSUNAMI

Original Message :

WEPA40 RJTD 161842

TSUNAMI BULLETIN NUMBER 001

ISSUED BY NWPTAC(JMA)

ISSUED AT 1842Z 16 AUG 2018

PART 01 OF 01 PARTS

HYPOCENTRAL PARAMETERS

ORIGIN TIME:1821Z 16 AUG 2018

PRELIMINARY EPICENTER:LAT23.5NORTH LON143.4EAST

VOLCANO ISLANDS, JAPAN, REGION

GUAM TO JAPAN

MAG:6.6(MJMA)

EVALUATION

THERE IS A VERY SMALL POSSIBILITY OF A DESTRUCTIVE LOCAL TSUNAMI

ESTIMATION AT THE FORECAST POINTS - NO TSUNAMIS WITH

AMPLITUDE OF 0.5 METER OR OVER ARE EXPECTED AT ANY OF THEM.

HOWEVER AT SOME COASTS, PARTICULARLY THOSE NEAR THE EPICENTER, HIGHER

TSUNAMIS MAY ARRIVE THAN OUR ESTIMATION

AUTHORITIES SHOULD BE AWARE OF THIS POSSIBILITY.

THIS WILL BE THE FINAL BULLETIN UNLESS THERE ARE CHANGES ABOUT

THE POTENTIAL OF TSUNAMI GENERATION BY RE-EVALUATION OF THE

EARTHQUAKE OR THERE ARE REPORTS ON TSUNAMI OBSERVATIONS.

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