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Earth, Planets and Space
Fig. 11 | Earth, Planets and Space

Fig. 11

From: Structured regularization based velocity structure estimation in local earthquake tomography for the adaptation to velocity discontinuities

Fig. 11

a Heat map of RMSE value for each pair of regularization parameters \(\left({\lambda }_{\text{ver}},{\lambda }_{\text{hor}}\right)\), in logarithmic scale. b Magnified view of around optimal point, (0.45, 0.95), illustrated by star. The drawing range is shown in a by the rectangle. c–e Estimated average velocities of each layer (red) and \({g}_{z}\) values (grey) for three pairs of regularization parameters: c (0.10, 0.10), d (0.45, 0.95), and e (2.00, 2.00). The corresponding points are shown in a by the stars

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