The most difficult component in the mitigation of devastating disasters is that extreme events happen only once, in one location, and occur only every 1000 to 2000years.Twothousand years is 70 generations in one family and it is longer than the historyof a country in some cases.Almost all people even including professionals in the government sector and the engineering societies may believe that there will no major earthquakesin the near future if they live in the area where the last major earthquake happened a few generations ago.
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