Tsunami Warning (Japan)
Type of emergency alert issued in Japan / From Wikipedia, the free encyclopedia
Dear Wikiwand AI, let's keep it short by simply answering these key questions:
Can you list the top facts and stats about Tsunami Warning (Japan)?
Summarize this article for a 10 year old
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]