Fault With Bottleneck Top: Seismograms of the y-component of velocity of a receiver line crossing the fault. Above the seismograms the distribution of maximum amplitude of S- and FZ-waves for each trace is shown. The solid line (FZ) corresponds to the FZ-wave, the dotted line (S) to the direct S-wave. The grey rectangle denotes the stations located directly above the fault. One tickmark of the amplitude scale corresponds to the maximum S-wave amplitude of all receivers. The seismograms and amplitudes are drawn to scale. Left: Bottleneck  of 13 1/3 FZ-widths extension in depth Center: Bottleneck  of 6 2/3 FZ-widths extension in depth (corresponds to the Basic Fault Movie) Right: Bottleneck  of 3 1/3 FZ-widths extension in depth Bottom: Left: Wave forms and spectra of the y-component of the FZ-waves. Additionally, the source spectrum is shown. Right: Envelopes of  the FZ-waves.

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