Earthquake!! The P wave propagates at ~6 km/sec in rock with particle motions that are parallel to the direction of propagation. The S wave is slower at 4 km/sec and propagates with particle motions that are perpendicular to the direction of propagation. When we record these waves, the gap between the P wave and the S wave provides information about how far away the earthquake occurred from the seismograph.
CLOSED CAPTIONING: A .srt file is included with the download. Use an appropriate media player to utilize captioning.
We encourage the reuse and dissemination of the material on this site as long as attribution is retained. To this end the material on this site, unless otherwise noted, is offered under Creative Commons Attribution (CC BY 4.0) license
