U.S. GEOLOGICAL SURVEY DIGITAL DATA SERIES DDS-7 DIGITIZED STRONG-MOTION ACCELEROGRAMS OF NORTH AMERICAN EARTHQUAKES 1933 - 1986 ACKNOWLEDGMENTS The DIGITIZED STRONG-MOTION ACCELEROGRAMS (DSMA) CD-ROM was produced by the U.S. Geological Survey. The authors wish to thank the following individuals and organizations for their special efforts in the production of this CD-ROM. Tom Hanks has always been the driving force behind this project. Inspired by the storage capability of CD-ROMs, it was his idea to assemble and distribute this data set on what was, at the time, a relatively new medium. April Converse wrote the BAP software that is available to process the data in this collection; she also wrote the AGRAM software that we used to process most of the files. She has often helped us with her programming knowledge and advice; we appreciate her attention to potential problems in the data set and, most importantly, her good spirit, patience, and constant encouragement. Larry Baker was invaluable in helping us to read magnetic tapes from antiquated computers. His understanding of computer systems was a valuable resource throughout the lifetime of this project; he has always been generous with his time and ideas. Howard Bundock also came to our assistance several times during computer crises. Chuck Mueller supervised the project and provided thoughtful guidance. Bill Joyner had already accumulated a large data subset on magnetic tape and was helpful in finding several records; he also provided information and ideas that were helpful in shaping the catalog as a whole. Pete Mork patiently searched old tapes written by former employees to find obscure records for us. Jo Switzer maintains an excellent data base of information about the recording stations; it was an important resource. Dave Boore helped us check the accuracy of the index files. 1 Tom Holzer facilitated data collection and publication. John Anderson of UNR's Mackay School of Mines, acted as an intermediary between the USGS and UNAM, arranging for the release of their data and transporting magnetic tapes. He has been supportive of this effort and was generous with his time and guidance, as well as with his data; we have benefited greatly from his interest and assistance. UNAM's Instituto de Ingenieria went to a great deal of trouble to make copies of their data for us; we are grateful that they provided us with their records and gave us permission to publish them. Jim Beck of Caltech helped us to locate post-Blue Book series records. Ahmed Abdel-Ghaffar of the University of Southern California made a valiant, albeit-unsuccessful effort to find the lost records from the 1976 Whittier, Calif., earthquake. George Segal of Kinemetrics Inc., and Frank Stead and Mike White of the Cleveland Electric Co. arranged permission for us to use the Perry Nuclear Power Plant record written by the January 1986 Cleveland, Ohio earthquake. Charles Kircher of Jack Benjamin and Associates and Dale Parker of IBM Corp. arranged permission for us to use IBM's Morgan Hill records. Paul Friberg helped us to use the NCEER data base and provided us with Lamont-Doherty-processed Alaska records. Dennis Ostrom of Southern California Edison sent us copies of their records and information about them. . The authors wish to give special thanks to Carl C. Abston, Office of Scientific Publications, Central Region, for helping develop the CD-ROM structure, the overview software and for facilitating the production of this CD-ROM containing the DSMA data. 2 The authors also wish to thank all of the organizations contributing data to this project. They include: o California Institute of Technology, Earthquake Engineering Research Lab o USGS National Cooperative Strong-Motion Instrument Network, o UNAM Instituto de Ingenieria (Mexico), o University of Nevada at Reno, Mackay School of Mines, Seismology Laboratory o National Geophysical Data Center, NOAA o California Strong Motion Instrumentation Program (San Salvador), o Lamont-Doherty Geological Observatory of Columbia University, o U.S. Army Corps of Engineers, o Saint Louis University (SLU), o Geological Survey of Canada, o Kinemetrics, Inc., o IBM o Cleveland Electric Company, o Southern California Edison. End of text; press the Escape key to continue. 2