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Fig. 4 | Progress in Earth and Planetary Science

Fig. 4

From: Reconstruction of a 2D seismic wavefield by seismic gradiometry

Fig. 4

Snapshots of the divergence and vertical component rotation vector obtained by seismic gradiometry in the synthetic reconstruction test for elapsed times of (a) t = 50, (b) t = 100, (c) t = 200 s, and (d) t = 300 s. In each frame, the left column shows divergence (top) and the vertical component of rotation (bottom) obtained by finite difference method (FDM) simulation in the 25–50 s period band. The same wavefields reconstructed by seismic gradiometry (SG) are shown on the right. See the text for explanations of the marks indicated by letters AE. Note that the simulation was performed in a limited tilted rectangular region (see Fig. 1) and the wavefields in the ocean area were not reconstructed by seismic gradiometry because of restrictions of the method (see text). The common normalized color scale is shown on the right. An MP4-formatted movie of the time-dependent wavefield is included in Additional file 2: Movie S2

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