Research Article

Geometrical-Feature-Preserving Adjoint Tomography of Near-Surface Structure with Seismic Early Arrival

Figure 4

The synthetic tests: (a) target model with alternating low and high velocity anomalies; (b) the travel time tomography results; (c) the inverted model of the L2-norm EWI; (d) the inverted model of the W2-norm EWI; (e) waveform fitting of early arrival between the synthetic data (red) and observed data (black) for the L2-norm EWI; (f) waveforms fitting of early arrival between the synthetic data (red) and observed data (black) for the W2-norm EWI.
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