Electronic Supplement to
Analysis of Rayleigh-Wave Particle Motion from Active Seismics

by Giancarlo Dal Moro, Nassir S. Al-Arifi, and Sayed S. R. Moustafa

This electronic supplement contains four animations to give a clear evidence of the Rayleigh-wave prograde and retrograde motion. A narrow Gaussian filter centered at the indicated frequency is applied, and the motion along the vertical–radial plane is shown. The first two animations refer to the first field dataset, whereas the third and the fourth animations refer to the second and third field datasets, respectively.


Animations

Animation S1 [h.264-encoded MPEG4 movie; ∼307 KB]. Field dataset 1; particle motion at 2.9 Hz (offset 50 m). The largely prograde motion (clockwise) is apparent (see also Fig. 9 of the main article).

Animation S2 [h.264-encoded MPEG4 movie; ∼279 KB]. Field dataset 1; particle motion at 5.1 Hz (offset 50 m). After an initial prograde (clockwise) motion may be related to a higher (faster) mode, the motion is then clearly anticlockwise (i.e., retrograde; see also Fig. 9 of the main article).

Animation S3 [h.264-encoded MPEG4 movie; ∼266 KB]. Field dataset 2; particle motion at 9 Hz. The apparent anticlockwise motion is the evidence of almost pure retrograde motion (see also Fig. 12 of the main article).

Animation S4 [h.264-encoded MPEG4 movie; ∼250 KB]. Field dataset 3; particle motion at 20 Hz. The motion is largely dominated by a clockwise motion related to a prograde motion (see also Fig. 15 of the main article).

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