http://upload.wikimedia.org/wikipedia/commons/a/ae/EastHanSeismograph.JPG
“SEISMOSCOPE” INVENTED IN CHINA IN 133 BC (HAN DYNASTY). http://upload.wikimedia.org/wikipedia/commons/a/ae/EastHanSeismograph.JPG. Collapsed buildings: Dec. 7, 1988, Armenia, M6.9, ~25,000 people died. http://www.pep.bc.ca/images/hazard_prep/Earthquake_Photos/11_236.jpg.
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