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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.
Tours (about 90 minutes + travel time to Leonard) are available for schools and other groups. Reservations required by phone or e-mail.
Source: Oklahoma Geological Survey at Leonard.