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About a year http://xxx-xxxxx.in.net/ bangla xxx  Shown to be effective in numerous trial runs, the system works by using sensors to detect small P waves, the first sign that an earthquake is about to occur. By analyzing the P waves, scientists can quickly calculate how large the much more damaging S waves will be, and alert officials what is on the way.
Gabriel 2019-12-05 10:54:49

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