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Home > Weather and Earthquakes > Tsunami Warnings/Advisories, Tsunami Information

Tsunami Information (Estimated Tsunami Arrival Time and Height)

Tsunami Information

This Tsunami Information was issued in the past
Occurred at 10:43 JST 20 Apr 2015
Region name Yonagunijima Kinkai
Depth very shallow
Magnitude 6.8
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Tsunami Forecast RegionEstimated Initial
Tsunami Arrival Time
Estimated
Maximum Tsunami Height
MIYAKOJIMA AND YAEYAMA AREA(*1)   1 m

Tsunami Information
(Estimated Tsunami Arrival Time and Height)

Issued at 10:47 JST 20 Apr 2015

Estimated Tsunami Arrival Times and Heights

Tsunami Forecast RegionEstimated Initial
Tsunami Arrival Time
Estimated
Maximum Tsunami Height
<Tsunami Advisory>
  MIYAKOJIMA AND
  YAEYAMA AREA
(*1)1 m
 
*1 mark: Arrival of tsunami inferred.

Please note that the height of actual tsunamis may exceed estimations in some coastal regions.

[ Explanation of Estimated Tsunami Height ]
Higher estimated tsunami height causes more serious damage.
over 10 m   Huge tsunami will hit and catastrophic damage will occur.
                 Wooden buildings will be completely destroyed and/or
                 washed away, and people will be caught in a current due
                 to the tsunami.
       10 m   Huge tsunami will hit and serious damage will occur.
                 Wooden buildings will be completely destroyed and/or
                 washed away, and people will be caught in a current due
                 to the tsunami.
         5 m   Tsunami will hit and serious damage will occur. Wooden
                 buildings will be completely destroyed and/or washed
                 away, and people will be caught in a current due to the
                 tsunami.
         3 m   Tsunami will hit and damage will occur in low-lying areas.
                 Wooden buildings will be flooded and people will be
                 caught in a current due to the tsunami.
         1 m   People will be caught in a strong current in the sea. Fish
                 farming facilities will be washed away and small vessels
                 will capsize.

Although there may be slight sea-level changes in coastal regions other than the above, no tsunami damage is expected in those coastal regions.

Earthquake Information
Occurred at 10:43 JST 20 Apr 2015
Region name YONAGUNIJIMA KINKAI
Latitude23.9N
Longitude122.5E
Depth very shallow
Magnitude 6.8