eprintid: 1298 rev_number: 18 eprint_status: archive userid: 2 dir: disk0/00/00/12/98 datestamp: 2015-02-16 08:42:15 lastmod: 2017-02-08 12:21:37 status_changed: 2015-04-27 12:10:38 type: article metadata_visibility: show creators_name: Kwiatek, Grzegorz creators_name: Plenkers, Katrin creators_name: Nakatani, Masao creators_name: Yabe, Yasuo creators_name: Dresen, Georg creators_id: kwiatek@gfz-potsdam.de creators_id: katrinp@gfz-potsdam.de creators_id: nakatani@eri.u-tokyo.ac.jp creators_id: yabe@aob.gp.tohoku.ac.jp creators_id: dre@gfz-potsdam.de corp_creators: Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, Germany corp_creators: Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, Germany corp_creators: Earthquake Research Institute of the University of Tokyo, Japan corp_creators: Tohoku University, Japan corp_creators: Helmholtz Center Potsdam, GFZ German Research Centre for Geosciences, Potsdam, Germany title: Frequency-Magnitude Characteristics Down to Magnitude -4.4 for Induced Seismicity Recorded at Mponeng Gold Mine, South Africa ispublished: pub subjects: RR subjects: SMU subjects: SS divisions: EPOS-P full_text_status: none abstract: This article aims to investigate the frequency-magnitude characteristics and lower magnitude limits of the microseismic catalog recorded with a seismic network sensitive to high frequencies at Mponeng mine, South Africa. The network, composed of one three-component accelerometer and eight acoustic emission sensors, is located at a depth of 3.5 km below the surface and covers the limited volume of approximately 300×300×300 m. The three-component accelerometer was used to estimate the moment magnitude for the limited number of 135 events (Mw ranged from -4.1 to -0.3) well recorded by the network. We use the relation between the moment magnitude estimated from accelerometer data and radiated energy/moment magnitude estimated from acoustic emission sensors to extend the catalog to lower magnitudes. The magnitude of completeness of selected spatiotemporal subsets of the catalog was estimated for: (1) an aftershock sequence of an Mw 1.9 event that occurred approximately 30 m from the network, and (2) postblasting activity during working days, located more than 80 m from the network. The data follow the Gutenberg–Richter (GR) frequency-magnitude relationship with no visible deviation from self-similar behavior of seismicity between Mw -4.4 and -1.9 for the aftershock sequence and between -3.5 and -1.5 for the postblasting dataset. We estimated the magnitude of completeness of selected subset as low as -4.3 (b=1.26) for the aftershock sequence and -3.4 (b=1.17) for the postblasting activity. Differences in magnitude of completeness are attributed to location of recorded activity and site effects. date: 2010-06 date_type: published publication: Bulletin of the Seismological Society of America volume: 100 number: 3 publisher: Seismological Society of America pagerange: 1165-1173 id_number: doi:10.1785/0120090277 refereed: TRUE issn: 0037-1106 official_url: http://dx.doi.org/10.1785/0120090277 access_IS-EPOS: limited owner: Publisher citation: Kwiatek, Grzegorz and Plenkers, Katrin and Nakatani, Masao and Yabe, Yasuo and Dresen, Georg (2010) Frequency-Magnitude Characteristics Down to Magnitude -4.4 for Induced Seismicity Recorded at Mponeng Gold Mine, South Africa. Bulletin of the Seismological Society of America, 100 (3). pp. 1165-1173. DOI: https://doi.org/10.1785/0120090277