Physical Sciences and Mathematics Commons^™

The Strain Seismograms Of P- And S-Waves Of A Local Event Recorded By Four-Gauge Borehole Strainmeter, Zehua Qui, Shunliang Chi, Zhenming Wang, Seth Carpenter, Lei Tang, Yanping Guo, Guang Yang

Faculty, Staff, and Affiliated Publications--KGS

At a sampling rate of 100 samples per second, the YRY-4 four-gauge borehole strainmeters (FGBS) are capable of recording transient strains caused by seismic waves such as P and S waves or strain seismograms. At such a high sampling rate, data from the YRY-4 strainmeters demonstrate fairly satisfactory self-consistency. The strain tensor seismograms demonstrate the senses of motion of P waves, that is, the type of seismic wave travels in the direction of the maximum normal strain change. The observed strain patterns of S waves significantly differ from those of P waves and should contain information about the source mechanism. …