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P wave
[ pee weyv ]
noun
- a longitudinal earthquake wave that travels through the interior of the earth and is usually the first conspicuous wave to be recorded by a seismograph.
P wave
- See primary wave
Word History and Origins
Origin of P wave1
Example Sentences
Los Angeles was likely too far away from Monday’s epicenter for anyone to feel the quake’s “P” wave — the first type of shaking wave an earthquake generates, in which the rock vibrates in the direction of the moving wave.
Depending on where people are, some may not get a warning before they feel the first shaking, which is known as the “P wave.”
This superrotation was gradually realigning the seismic wave paths with a north-south axis in the inner core known to boost P wave speeds.
The system’s sensors can rapidly detect that initial P wave and send that data to a processing center, where algorithms can determine and estimate the geographical extent of the earthquake, the magnitude and the expected shaking intensity in different areas, Crayne said.
“The P wave is first and fast. It travels out and ahead of the S wave, and it is not producing the shaking,” Crayne said.
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