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en.wikipedia.org/wiki/P-wave

Primary and secondary waves are body waves that travel within the Earth. The motion and behavior of both P-type ...

earthquake.usgs.gov/learn/glossary/?term=P%20wave

P wave. A P wave, or compressional wave, is a seismic body wave that shakes the ground back and forth in the same direction and the opposite direction as the  ...

www.geo.mtu.edu/UPSeis/waves.html

Seismology is the study of earthquakes and seismic waves that move through ... P Waves. The first kind of body wave is the P wave or primary wave. This is the ...

www.dictionary.com/browse/primary-wave

primary wave. A type of seismic body wave in which rock particles vibrate parallel to the direction of wave travel. Primary waves are alternatingly compressional ...

www.kids-earth-science.com/primary-waves.html

Primary waves are the first earthquake waves to reach reporting stations. There are several million earthquakes each year and every one produces these waves.

www.kids-fun-science.com/p-waves.html

Inge Lehmann in 1936 used the travel times of P waves through the center of the Earth to prove the existence of a solid inner core of the Earth.

www.colorado.edu/physics/phys2900/homepages/Marianne.Hogan/waves.html

Earthquakes generate three types of seismic waves: P (primary) waves, S ( secondary) waves and surface waves, which arrive at seismic recording stations one ...

www.britannica.com/science/primary-wave

The P seismic waves travel as elastic motions at the highest speeds. They are longitudinal waves that can be transmitted by both solid and liquid materials in the ...

www.enotes.com/homework-help/what-characteristics-does-p-waves-s-waves-have-144707

P (Primary) and S (Secondary) Waves are Body Waves often associated with Seismic Waves as in Earthquakes. Both Body Waves and Surfaces waves ...