CICA staff worked with researchers in the Department of Geological Sciences to help produce this image. Until recently, seismometers recorded only up-down motion, and the standard display was the seismogram, a wiggly line drawn with a pen plotting on a scrolling sheet of paper. Animated visual techniques are now being used for the analysis of seismic motion generated by earthquakes in Southern California. It is displayed as either vector displacement, particle motion traces, or surface displacement of the entire array. Updating the screen image for each digital sample produces an animated display analogous to a movie of an earthquake. Work is currently under way to add sound to the frequency domain animation. (For more information see Geological Seismic Arrays.)