Accelerographs measure ground acceleration in three different components of motion: east-west, north-south, and vertically (up-down). I know that fault orientation is important here, so let's say we are dealing with a thrust fault. If an accelerograph shows greater ground acceleration in the north-south direction (greater than east-west ground acceleration), then could one assume that the fault which caused an earthquake is spatially oriented with north-south or east-west attitude?


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