that could occur in a region and their characteristics and frequency of occurrence. Secondly, studying strong ground motions generated by earthquakes to assess the expected shaking from future earthquakes with similar characteristics. These strong ground motions could either be observations from accelerometers or seismometers or those simulated by computers using various techniques, which are then often used to develop ground motion prediction equations (or ground-motion models). Tools Seismological instruments can generate large amounts of data. Systems for processing such data include: CUSP (Caltech-USGS Seismic Processing) RadExPro seismic software SeisComP3 Notable seismologists Aki, Keiiti Ambraseys, Nicholas Anderson, Don L. Bolt, Bruce Claerbout, Jon Dziewonski, Adam Marian Ewing, Maurice Galitzine, Boris Borisovich Gamburtsev, Grigory A. Gutenberg, Beno Hough, Susan Jeffreys, Harold Jones, Lucy Kanamori, Hiroo Keilis-Borok, Vladimir Knopoff, Leon Lehmann, Inge Macelwane, James Mallet, Robert Mercalli, Giuseppe Milne, John Mohorovičić, Andrija Oldham, Richard Dixon Omori, Fusakichi Sebastião de Melo, Marquis of Pombal Press, Frank Richards, Paul G. Richter, Charles Francis Sekiya, Seikei Sieh, Kerry Paul G. Silver Stein, Ross Tucker, Brian Vidale, John Wen, Lianxing Winthrop, John Zhang Heng See also (starquakes) Notes References External links European-Mediterranean Seismological Center, real-time earthquake information website. Seismological Society of America. Incorporated Research Institutions for Seismology. USGS Earthquake Hazards Program. A brief history of seismology to 1910 (UCSB ERI)