Extended Data Fig. 3: Progress of waveform inversion from iteration 0 to 60 as measured by sum of squares misfit and correlation coefficient.
From: Physical conditions and frictional properties in the source region of a slow-slip event
All downward extrapolated shots along seismic profile 05CM-38 were inverted, for a total of 2321 shots (shots 1070 to 3390, see Supplementary Movie 2). a Sum of squares misfit and cross correlation as a function of shot number. The misfit (green, iteration 0; black, iteration 60) is compared to the data size, blue. The sum of squares misfit is 149% of the data size initially but is reduced to 31% by iteration 60. The average correlation coefficient increases from 0.38 to 0.82 with the remaining lower correlation regions coinciding with regions where free gas is present beneath the bottom simulating reflection (see Figs. 2 and 3; Extended Data Fig. 1). b Histogram of correlation coefficient value between observed and modelled seismograms for iterations 0 and 60, with mean (red cross), median (red line), 25% and 75% quartiles (blue box) and 10% and 90% percentiles (gray whiskers).
