<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Observation of numerous aftershocks of an M w 1.9 earthquake with an AE network installed in a deep gold mine in South Africa"^^ . "This is the first report from the JAGUARS (JApanese-German Underground Acoustic Emission Research in South Africa) project, the overall aim of which is to observe ultra-small fracturing in a more or less natural environment. We installed a local (∼40-m span) network of eight acoustic emission (AE) sensors, which have the capability to observe up to 200 kHz at a depth of 3.3 km in a South African gold mine. Our specific objective was to monitor a 30-m thick dyke that remains as a dip pillar against active mining ∼90 m above our network. An M w 1.9 earthquake whose hypocenter was ∼30 m above the network occurred in the dyke. Although the mineowned geophone (4.5 Hz) network detected only five earthquakes in the surrounding 200×200×150-m3 volume within the first 150 h following the main shock, our AE network detected more than 20,000 earthquakes in the same period. More than 13,000 of these formed a distinct planar cluster (∼100×80 m2) on which the main shock hypocenter lay, suggesting that this cluster delineates the main shock rupture plane. Most of the aftershocks were presumably very small, probably as low as M ∼ −4. The aftershock cluster dipped ∼60°. This is consistent with normal faulting under a nearly vertical compression field, as indicated by nearly horizontal breakouts found in a borehole crossing the rupture plane."^^ . "2009-11" . . "61" . "10" . . "Terra Scientific Publishing Company"^^ . . . "Earth, Planets and Space"^^ . . . "13438832" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Makoto"^^ . "Naoi"^^ . "Makoto Naoi"^^ . . "Hironori"^^ . "Kawakata"^^ . "Hironori Kawakata"^^ . . "Joachim"^^ . "Philipp"^^ . "Joachim Philipp"^^ . . "Hiroshi"^^ . "Ogasawara"^^ . "Hiroshi Ogasawara"^^ . . "Gilbert"^^ . "Morema"^^ . "Gilbert Morema"^^ . . "Toshihiro"^^ . "Igarashi"^^ . "Toshihiro Igarashi"^^ . . "Georg"^^ . "Dresen"^^ . "Georg Dresen"^^ . . "Yasuo"^^ . "Yabe"^^ . "Yasuo Yabe"^^ . . "Masao"^^ . "Nakatani"^^ . "Masao Nakatani"^^ . . "Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan"^^ . . . "GMuG Gesellschaft für Materialprüfung und Geophysik, Dieselstraße 9, 61231, Bad Nauheim, Germany"^^ . . . "Earthquake Research Institute, the University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo, 113-0032, Japan"^^ . . . "SeismoGen cc, PO Box 1177, Carletonville, 2500, South Africa"^^ . . . "Earthquake Research Institute, the University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo, 113-0032, Japan"^^ . . . "Faculty of Science and Engineering, Ritsumeikan University, 1-1-1 Noji Higashi, Kusatsu, 525-8577, Japan"^^ . . . "Earthquake Research Institute, the University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo, 113-0032, Japan"^^ . . . "Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Telegrafenberg, 14473, Potsdam, Germany"^^ . . . "Faculty of Science and Engineering, Ritsumeikan University, 1-1-1 Noji Higashi, Kusatsu, 525-8577, Japan"^^ . . . . . . "HTML Summary of #1308 \n\nObservation of numerous aftershocks of an M w 1.9 earthquake with an AE network installed in a deep gold mine in South Africa\n\n" . "text/html" . . . "RPA" . . . "Underground mining" . . . "Method and procesing" . .