WHEN a big earthquake strikes, it does not do equal harm everywhere. Places resting on unstable sediment will shift around a lot and are thus likely to be damaged badly. Those resting on bedrock are normally better off--though not if they are stuck at the end of a rocky promontory that amplifies a quake's vibrations in the manner of a tuning fork. Finding the areas most badly damaged, and therefore most urgently in need of assistance, in an area whose geology is not already well understood is th...
WHEN a big earthquake strikes, it does not do equal harm everywhere. Places resting on unstable sediment will shift around a lot and are thus likely to be damaged badly. Those resting on bedrock are normally better off--though not if they are stuck at the end of a rocky promontory that amplifies a quake's vibrations in the manner of a tuning fork. Finding the areas most badly damaged, and therefore most urgently in need of assistance, in an area whose geology is not already well understood is th...
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