Fig. 4
From: The waveform inversion of mainshock and aftershock data of the 2006 M6.3 Yogyakarta earthquake
The grid search method to obtain the best solution for the mainshock focal mechanism as a function of time sampling and variance for each speed and range for the bandpass filter models as shown in Table 2. The blue, yellow, red, brown, and green color beachballs indicate the filtering used by Nakano, Suardi, Mikumo, Yagi, and this study, respectively. The velocity models used include a AK135, b CRUST, c PREM, d JB and e Koulakov