The SCEC (Southern California Earthquake Center) Data Center provides archives of seismological data recorded by the Southern California Seismic Network (SCSN) and TERRAscope. The Data Center presents data sets for selected earthquakes as well as global positioning system data from organizations such as the U.S. Geological Survey. There are links to recent Southern California seismicity reports and maps, and to other seismology research centers on the Internet.