This map shows the predicted (theoretical) travel times, in minutes, of the compressional (P) wave from the earthquake location to points around the globe.

Perhaps, an even more intriguing idea is this: transiting compressional waves cause pressure gradients.

Replies: A compressional wave traveling through a material cannot propagate into a vacuum, because the constituent particles do not have anything to "push against".

Density is also related to elastic parameters through velocity equations for compressional and shear waves.

There are neither compressional waves nor flexural contributions to the displacement pattern.

These receivers record the arrival time of the compressional waves.

"That's really surprising because sand is supposed to damp compressional waves," Dr. Brownell said.

The nickel-iron core only a short distance beyond raged and tossed with prickly white compressional waves.

They are compressional waves, the energy being transmitted by an initial compression of particles which is then passed on to adjacent particles.

Primary waves (P-waves) are compressional waves that are longitudinal in nature.