0:45 [ENG SUB] How Earthquake Early Warning works : smartphone and radio broadcast kappa-no koura 4M views - 8 years ago
![[ENG SUB] How Earthquake Early Warning works : smartphone and radio broadcast](/thumb?url=http%3A%2F%2Finvidious%3A3000%2Fvi%2FYTyvBA02nYk%2Fmqdefault.jpg)
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