Magnitude, distance, and intensity data for C.I.T. strong motion records

The site Modified Mercalli intensities and epicentral distances of strong motion records published by the California Institute of Technology are reported, as well as the magnitude, focal depth, and maximum Modified Mercalli intensity of the event associated with each record. These data were obtained from original sources. The use of the data to derive ground motion relations for design is discussed; possible biases in the data which might affect such relations are described.