The diagrams show what happens when P waves and S waves pass through the Earth ... It is the slowest of the three types of seismic wave. Surface waves usually have larger amplitude than the ...

Because P waves are the fastest seismic waves, they will usually be the first ones that your seismograph records. The next set of seismic waves on your seismogram will be the S waves. These are ...

The S wave shadow zone is the area of the Earth’s surface where S waves are not detected following an earthquake. This shadow zone has led geologists to a model of the Earth with a solid mantle ...

The Alaska Earthquake Center reported a magnitude 3 earthquake about 3:20 p.m. Monday about two miles south of Haines.

according to documentation on the agency’s website. Now a network of seismographs spans the country, measuring the initial P-waves when an earthquake strikes. Agency computers collate the data ...

The researchers noted that the earthquake's coda waves—the signature of residual ... There were also signs of a late-arriving, "extra" P-wave phase, in addition to the normal initial P-waves ...