2015-04-17 11:06 GMT+02:00 Christoph Hormann <chris_horm...@gmx.de>: > As far as radiation is concerned - most above-ground nuclear tests have > not left sufficiently strong localizable radiation to qualify as > mappable in OSM, for most underground explosion there is no or very > little radiation detectable at the surface. So radiation is not really > a very useful criterion. >
you can find e.g. traces of Plutonium which doesn't occur naturally on earth. Also, there is still higher radiation at the sites AFAIK, it might not be very high, but it might still be significant (but maybe is not localizable to an exact spot). Even today you can find higher cancer rates in Hiroshima (depending on the study), even if the whole area was "cleaned" shortly after the bomb in 1945 by a typhoon. Yes, you will likely not be able to tell the exact explosion position from looking at the radiation or distribution of unusual radioactive isotopes, but you can see the crater and get a quite precise location of the bomb when dealing with near surface explosions. Undoubtedly there will be geologic traces of underground explosions, even if not surveyable at the surface, they are there. These events are different to a bag of rice fallen over. Cheers, Martin
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