Figure S13. Quality of MPS data fitting and comparison on the total number of MPS sub-events. (a) The variance reduction is being improved during the MCMC inversion processes of 5-, 6- and 7-sub-events, before it reaches a ‘plateau’. The optimization efficiency is greatly improved by using 6-sub-events compared to 5-sub-events, but the improvement is less evident when using 7-subevents. (b)-(f) Statistics of cross-correlation coefficients of high-rate GPS, regional Pnl, regional surface wave, teleseismic P and teleseismic S wave components shows systematic improvement of using 6-sub-events compared to 5-subevents. 7-sub-events shows better fits to teleseismic data but poorer fits to local GPS and regional waveform observations.