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      Unexpectedly frequent occurrence of very small repeating earthquakes (−5.1 ≤ M w ≤ −3.6) in a South African gold mine: Implications for monitoring intraplate faults

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          Most cited references 33

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          Propagation of slow slip leading up to the 2011 M(w) 9.0 Tohoku-Oki earthquake.

          Many large earthquakes are preceded by one or more foreshocks, but it is unclear how these foreshocks relate to the nucleation process of the mainshock. On the basis of an earthquake catalog created using a waveform correlation technique, we identified two distinct sequences of foreshocks migrating at rates of 2 to 10 kilometers per day along the trench axis toward the epicenter of the 2011 moment magnitude (M(w)) 9.0 Tohoku-Oki earthquake in Japan. The time history of quasi-static slip along the plate interface, based on small repeating earthquakes that were part of the migrating seismicity, suggests that two sequences involved slow-slip transients propagating toward the initial rupture point. The second sequence, which involved large slip rates, may have caused substantial stress loading, prompting the unstable dynamic rupture of the mainshock.
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            Body wave spectra from propagating shear cracks.

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              Does apparent stress vary with earthquake size?

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                Author and article information

                Journal
                Journal of Geophysical Research: Solid Earth
                J. Geophys. Res. Solid Earth
                Wiley
                2169-9313
                2169-9356
                December 02 2015
                December 2015
                December 23 2015
                December 2015
                : 120
                : 12
                : 8478-8493
                Affiliations
                [1 ]Department of Civil and Earth Resources Engineering, Graduate School of EngineeringKyoto University Kyoto Japan
                [2 ]Earthquake Research InstituteTokyo University Tokyo Japan
                [3 ]Department of Earth Science, Graduate School of ScienceTohoku University Sendai Japan
                [4 ]Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of ScienceTohoku University Sendai Japan
                [5 ]Council for Scientific and Industrial Research Pretoria South Africa
                [6 ]Research Organization of Science and EngineeringRitsumeikan University Kyoto Japan
                [7 ]Open House Management Solutions Potchefstroom South Africa
                [8 ]SeismoGen Cc Carletonville South Africa
                [9 ]Graduate School of EngineeringTohoku University Sendai Japan
                [10 ]College of Science and EngineeringRitsumeikan University Kyoto Japan
                [11 ]Department of Earth and Environmental ScienceKagoshima University Kagoshima Japan
                [12 ]School of GeosciencesUniversity of the Witwatersrand Johannesburg South Africa
                Article
                10.1002/2015JB012447
                © 2015

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