![]() While the source mechanisms of the western part of the Baribis fault indicate a thrust fault and the cluster of events in Garut shows a right-lateral slip if they are related to a local fault. The Cimandiri fault also shows a left-lateral slip, but in the south it shows a thrust fault mechanism. Source mechanism throughout the Lembang fault indicates a left-lateral strike slip in agreement with previous studies. Histograms of travel-time residuals depict good results, in which travel-time residuals are mostly close to zero. In addition, there is another cluster in Garut trending southwest-northeast, which is possibly related to a local fault. There are several clusters of earthquakes at depths ≤ 30 km, which are probably related to the Cimandiri, Lembang, and Baribis faults. The results indicate improved hypocenter locations, where patterns of seismicity in West Java were delineated clearly. ![]() We also conducted focal mechanism analysis to estimate the type of fault slip. We then relocated the events using hypocenter double-difference method. Earthquake locations were determined using Hypoellipse code that employs a single event determination method. We determined earthquake locations through re-picking of P- and S-wave arrival times recorded by BMKG network.
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