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Unformatted text preview: hours ahead of the earthquake happening What can we look at to predict earthquakes in the future? 1) historical records ~200 year : patterns and statistics 2) stress meters along the fault lines 3) seismographs to record foreshock 4) Land displacement 5) ground water levels could shift 6) animals behavior 7) magnetic properties 8) anthropogenic activities 9) radon emissions Two forecast strategies a) find a specific precursor- change in # of earthquakes- slow ground motion- radon emission- electrical resistivity- water chemistry- seismic wave velocity b) forecast a general pattern What things could one use to figure out the composition and structure of the deep earth?-drilling -fossil fuels (very surface structures) -sonar ground penetrating radar -surface observations-magnetic field -volcanic rocks - composition xenoliths -meteroites...
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- Fall '08