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Fig. 9 | Earth, Planets and Space

Fig. 9

From: Influence of low-velocity superficial layer on long-period basin-induced surface waves in eastern Osaka basin

Fig. 9

Hybrid method second step: replication test of the Ricker pulse S-wave. Snapshot at the edge of the computational model. Total horizontal component of velocity at vertical section of the second-step hybrid model at depth of 400 m to 4000 m (free surface not shown). The arrows are slownesses (not to scale). The S–S reflected wave propagates through the hybrid box because it is not contained in the incoming (background) wave field. Should the S–S be included in such background wave filed, the SS reflection would be perfectly absorbed by the hybrid box; hence, it would be present only in the complete wave field part in the second hybrid step (as described in Oprsal et al. 2002 for DWN-FD and ray-FD hybrid formulations)

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