Together with Yehuda Ben-Zion we published a paper in Journal of Geophysical Research. The paper is entitled “Assessment of P and S wave energy radiated from very small shear-tensile seismic events in a deep South African mine“. The publication is my come-back to the JAGUARS project that we worked on between 2007 and 2011 and analyzed nano- and picoseismicity recorded in Mponeng deep gold mine in South Africa.
In the study we discuss requirements for reliable estimates of radiated seismic energy in S and P phases and derive ratios of S-to-P radiated energy of over 500 extremely small seismic events with local magnitudes −5.23 ≤ ML ≤ −2.41 (subdecimeter size) recorded by high-frequency acoustic emission (AE) sensors of the JAGUARS seismic network in the Mponeng deep gold mine, South Africa. Please see the article page for details.
Reference: Kwiatek, G. and Y. Ben-Zion (2013). Assessment of P and S wave energy radiated from very small shear-tensile seismic events in a deep South African mine. J. Geophys. Res. 118, DOI: 10.1002/jgrb.50274.