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Shock waves: In dim light, this seismometer resembles a quiet desert, its sand scored with shifting tracks. The lines are actually drawn by a stylus, visible in the upper right, onto a ream of paper attached to a rotating drum. The device, located in the civil engineering department's seismic recording station in the Snell Engineering Center, can detect earthquakes far and near. The tremor shown, in fact, shook the Aleutian Islands in mid-December.
Photograph by David Leifer
