Moment tensor analysis using regional and temporary deployment 2008 data for Sumatran active fault zone earthquakes

The purpose of this study is to determine the focal mechanisms of the earthquakes through moment tensor inversion of seismograms derived from local events in Sumatran fault zone. We use ISOLA software for data processing which is widely used to estimate the source parameters from local events. We retrieve seismogram data from three selected local events recorded by ZB temporary deployment and BMKG-GEOFON networks. The inversion results reveal that the deformation style around this fault zone is dominated by strike slip motion with shallow focal depths. These results are also consistent with regional active tectonics revealed by other geophysical and geological studies.