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review by . March 14, 2011
Apparently, Japan's emergency warning system detects P-waves that are sent out by tremors, and then alerts people on on their computers´╗┐ before the bigger S-waves arrive. They also do this on every TV station, and will send texts to your mobile phone. This allows the Japanese to have a little time to prepare for the upcoming quake.  Needless to say, the technology is amazing.  For an example of what the big 2011 quake would have been like if you were in Japan at the time of the quake …
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Japan's Emergency Warning System for Earthquakes
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