TY  - JOUR
ID  - epos2103
UR  - http://doi.org/10.1190/1.3627516
A1  - Gharti, Hom Nath
A1  - Oye, Volker
A1  - Kuhn, Daniela
A1  - Zhao, Peng
Y1  - 2011///
N2  - We use time?reversal imaging for microearthquake location and investigate the possibility of a
simultaneous qualitative moment?tensor estimation. We cross?correlate the data with the synthetic
strain Green's tensor and stack individually for each moment?tensor component. The objective
function for the source location is then formulated as the squared sum of those stacked components.
The maximum value of the objective function corresponds to the estimated source location and
origin time. Similarly, the corresponding stacked components at the estimated source location give
the entire time history of the qualitative estimation of the moment tensor. We apply the method to
synthetic data of various types of moment?tensor sources computed for a complex and
heterogeneous model, namely the Pyhäsalmi ore mine in Finland. We also test the method with the
same data adding white noise up to 40% of the absolute maximum. Although the method is
computationally intensive, it is fully automatic and can easily be adapted to parallel processing. The
preliminary results show that the method is robust and reliable.
PB  - Society of Exploration Geophysicists
JF  - SEG Technical Program Expanded Abstracts 2011
VL  - 2011
SN  - 1949-4645
TI  - Simultaneous microearthquake location and moment?tensor estimation using time?reversal imaging
SP  - 1632
AV  - none
EP  - 1637
ER  -