The Oklahoma Geological Survey Observatory is a research and public-service agency located in rural Tulsa County. The OGS Observatory is a part of the Oklahoma Geological Survey and the University of Oklahoma. The OGS was written into the Constitution of Oklahoma in 1907, and is the only state geological survey to hold that distinction. The enabling legislation was signed into law on May 29, 1908. The Survey's mandate remains to study Oklahoma's geology, prepare and distribute reports, and promote wise use of the State's natural resources.

The Oklahoma Geological Survey Observatory in rural Tulsa County, south of Leonard is a comprehensive
geophysical observatory which records, identifies, and locates  50 to 167 in Oklahoma each year, and also records atleast seven worldwide earthquakes per day.

Norman Staff:  Randy G. Keller - Director Oklahoma Geological Survey
               Ken Luza - Coordinator for Observatory Programs
               Austin Holland -Research Seismologist Office: 405-325-8497

Leonard Staff:  Amie R. Gibson - Research Scientist II  918-366-4152
                        amiegibson@ou.edu
                 
                Jake Nance - Research Specialist  918-366-4152
                         jakenance@ou.edu

REPORT FEELING AN OKLAHOMA EARTHQUAKE

                                                                                                                             Website updated 11:56 am CDT 03-11-2010

Nine Earthquakes recorded in Canadian County: Several felt in Niles & Minco OK. 3/11/10   LATEST OKLAHOMA EARTHQUAKES!

The six largest earthquakes locations are very well constrained and on relocation we expect the magnitude 2.1 earthquake to centered with the cluster.  The cluster of six earthquakes is 7 miles west of Union City Oklahoma in Canadian County near the border with both Grady and Caddo Counties.  The cluster is about 11 miles SSW of El Reno.

Red circle: felt earthquake./font> Black circle: earthquake not known to be felt. Circle diameters are proportional to the square of magnitude. Made with GMT. Projection info, GMT map and PERL catalog conversion scripts.  Scroll page of individual annual maps 1977-2001.

Main OGS website at Norman Oklahoma

Seismograms, Spectrograms, and selected Magnetograms

Map of Oklahoma Seismograph Stations

Oklahoma Geology, Oklahoma crustal models, Leonard sedimentary sections, and boreholes

Nuclear Explosion Catalog

Technical HOW TO

OGS Seismic website access statistics

Steve Malone's Seismosurfing-lists all seismology/earthquake sites in the world

Log linear graph paper template Last Four Days Oklahoma City (OKCSW) (Sweetheart) 24 hour seismograms of broadband East/West earth motion, Updated each hour (times in GMT).