eprintid: 2004 rev_number: 16 eprint_status: archive userid: 9 dir: disk0/00/00/20/04 datestamp: 2017-09-19 06:27:23 lastmod: 2017-09-19 07:05:27 status_changed: 2017-09-19 06:27:23 type: article metadata_visibility: show creators_name: McNamara, D. E. creators_name: Rubinstein, Justin L. creators_name: Myers, E. creators_name: Smoczyk, G. creators_name: Benz, H. M. creators_name: Williams, R. A. creators_name: Hayes, G. creators_name: Wilson, D. creators_name: Herrmann, R. creators_name: McMahon, N. D. creators_name: Aster, R. C. creators_name: Bergman, E. creators_name: Holland, Austin A. creators_name: Earle, P. corp_creators: U. S. Geological Survey, National Earthquake Information Center corp_creators: U. S. Geological Survey corp_creators: U. S. Geological Survey, National Earthquake Information Center corp_creators: U. S. Geological Survey, National Earthquake Information Center corp_creators: U. S. Geological Survey, National Earthquake Information Center corp_creators: U. S. Geological Survey, National Earthquake Information Center corp_creators: U. S. Geological Survey, National Earthquake Information Center corp_creators: U. S. Geological Survey, Albuquerque Seismological Laboratory corp_creators: Department of Earth and Atmospheric Sciences, St. Louis University. corp_creators: Department of Geosciences, Colorado State University corp_creators: Department of Geosciences, Colorado State University corp_creators: Global Seismological Services corp_creators: Oklahoma Geological Survey corp_creators: U. S. Geological Survey, National Earthquake Information Center title: Efforts to monitor and characterize the recent increasing seismicity in central Oklahoma subjects: MP2 subjects: RU6 subjects: SHC subjects: SHU divisions: IP14 divisions: SHEER-8 full_text_status: none abstract: The sharp increase in seismicity over a broad region of central Oklahoma has raised concerns regarding the source of the activity and its potential hazard to local communities and energy-industry infrastructure. Efforts to monitor and characterize the earthquake sequences in central Oklahoma are reviewed. Since early 2010, numerous organizations have deployed temporary portable seismic stations in central Oklahoma to record the evolving seismicity. A multiple-event relocation method is applied to produce a catalog of central Oklahoma earthquakes from late 2009 into early 2015. Regional moment tensor (RMT) source parameters were determined for the largest and best-recorded earthquakes. Combining RMT results with relocated seismicity enabled determination of the length, depth, and style of faulting occurring on reactivated subsurface fault systems. It was found that the majority of earthquakes occur on near-vertical, optimally oriented (northeast-southwest and northwest-southeast) strike-slip faults in the shallow crystalline basement. In 2014, 17 earthquakes occurred with magnitudes of 4 or larger. It is suggested that these recently reactivated fault systems pose the greatest potential hazard to the region. date: 2015 date_type: published publication: The Leading Edge volume: 34 number: 6 publisher: Society of Exploration Geophysicists pagerange: 628-639 id_number: doi:10.1190/tle34060628.1 issn: 1070-485X official_url: http://doi.org/10.1190/tle34060628.1 access_IS-EPOS: limited owner: Publisher citation: McNamara, D. E. and Rubinstein, Justin L. and Myers, E. and Smoczyk, G. and Benz, H. M. and Williams, R. A. and Hayes, G. and Wilson, D. and Herrmann, R. and McMahon, N. D. and Aster, R. C. and Bergman, E. and Holland, Austin A. and Earle, P. (2015) Efforts to monitor and characterize the recent increasing seismicity in central Oklahoma. The Leading Edge, 34 (6). pp. 628-639. DOI: https://doi.org/10.1190/tle34060628.1