Tsunami Warning (Japan)

Japan has a nationwide Tsunami Warning system (Japanese: 大津波警報津波警報津波注意報). The system usually issues warnings a few minutes after an Earthquake Early Warning (EEW) is issued, should waves be expected,[1][2] usually when a combination of high magnitude, seaward epicenter and vertical focal mechanism is observed. The tsunami warning was issued within 3 minutes with the most serious rating on its warning scale during the 2011 Tōhoku earthquake and tsunami; it was rated as a "major tsunami", being at least 3 m (9.8 ft) high.[2][3] An improved system was unveiled on March 7, 2013, following the 2011 disaster to better assess imminent tsunamis.[4][5]

  1. ^ "Japan Meteorological Agency|Flow of issuance of information about tsunami and earthquake". Retrieved 15 April 2016.
  2. ^ a b "80 Seconds of Warning for Tokyo". MIT Technology Review. Retrieved 15 April 2016.
  3. ^ "Emergency Warning System Starting Shortly" (PDF). Archived from the original (PDF) on 13 August 2013. Retrieved 15 April 2016.
  4. ^ "Leaflet "Start of New Tsunami Warning System Operation"" (PDF). Archived from the original (PDF) on 21 July 2014. Retrieved 15 April 2016.
  5. ^ "Tsunami two years on: Japan finally gets warning system that would have saved hundreds of lives". 9 March 2013. Retrieved 15 April 2016.