This example, circa 1991, is characteristic of site modeling problems in Earth Sciences. The image shows visualization of several variables in data taken from a geothermal energy site in Northern California. The slice planes show color-coded pressure (water), and the two isosurfaces show 3D regions of constant water pressure within the field. The spheres at the surface (top of the image) are observation stations, and the cloud of points inside the volume represent earthquake epicenters. Although hard to see, the red polylines show the path taken by geothermal wells in the field. Unfortunately, there is no additional information about this image or the science - such information has been lost to history.