The Northern California Earthquake Data Center (NCEDC) offers various types of earthquake-related data. Most of the datasets are available on the WWW. A few require the establishment of a research account. Available information includes: earthquake catalogs and lists; seismic waveform data from the Berkeley Digital Seismic Network, the Northern California Seismic Network, the Parkfield High-Resolution Seismic Network, and the Calpine/Unocal Geysers Network; Global Positioning System data from continuous monitoring stations; and Berkeley Digital Seismic Network temperature, electromagnetic and strain data. Educational levels: Graduate or professional, Undergraduate lower division, Undergraduate upper division