Abstract

A micrometer microscope has been used to obtain particle motion diagrams for the S phase re-recorded at Florissant for distances from 50° to 80°. The diagrams indicate that the particle motion is linear. Furthermore, the diagrams show that the SV and SH components arrive simultaneously. They also show that it is sometimes very difficult to obtain the sense of the first S motion from a simple visual inspection of the seismograms.

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