Oklahoma Geological Survey Observatory, Number One Observatory Lane, POB 8, Leonard, OK 74043.
Phone: (918) 366-4152
Toll-Free: (800) 330-3996
Fax: (918) 366-4156
Website includes Oklahoma earthquake maps, catalogs, seismograms and spectrograms, a catalog of worldwide nuclear tests, a form to use to report an earthquake in Oklahoma or surrounding states, and links to seismic sites.