“…(Photo courtesy of Andre Basset) Japan (Shimada and Bock 1992). The first continuous GPS sites in southern California were installed in 1990 at Pasadena, Piñon Flat, and La Jolla (Larson 1995). Today many countries have extensive CGPS networks for geophysical monitoring purposes, most notably GEONET which consists of over 1000 stations across Japan (Sagiya 2004b (Fig.…”