why do p waves travel faster ?

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why do p waves travel faster ?

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https://en.wikipedia.org/wiki/P_wave

https://en.wikipedia.org/wiki/P_wave
P wave – Wikipedia
A P wave ( primary wave or pressure wave) is one of the two main types of elastic body waves, called seismic waves in seismology. P waves travel faster than other seismic waves and hence are the first signal from an earthquake to arrive at any affected location or at a seismograph. P waves may be transmitted through gases, liquids, or solids.

https://geo.libretexts.org/Bookshelves/Geology/Fundamentals_of_Geology_(Schulte)/08:_Earthquakes/8.03:_Seismic_Waves

https://geo.libretexts.org/Bookshelves/Geology/Fundamentals_of_Geology_(Schulte)/08:_Earthquakes/8.03:_Seismic_Waves
8.3: Seismic Waves – Geosciences LibreTexts
P-waves travel through the earth’s interior many times faster than the speed of a jet airplane, taking only a few minutes to travel across the earth. P-waves are predominantly compressional waves. As a P-wave passes, material compresses in the same direction the wave is moving, and then extends back to its original thickness once the has …

https://seismo.berkeley.edu / blog / 2008 / 09 / 10 / p-waves-and-s-waves-which-are-faster.html

https://seismo.berkeley.edu / blog / 2008 / 09 / 10 / p-waves-and-s-waves-which-are-faster.html
P-waves and S-waves – which are faster? – University of California …
During the shaking, the ground moves in the direction of the propagating wave. (see Fig. 1). The other type is called a shear wave, because it make the ground move perpendicular to the wave direction (see Fig. 2) Compressional waves are also called P-Waves, (P stands for primary) because they are always the first to arrive.

https://geo.libretexts.org/Bookshelves/Geology/Physical_Geology_(Earle)/09:_Earths_Interior/9.01:_Understanding_Earth_Through_Seismology

https://geo.libretexts.org/Bookshelves/Geology/Physical_Geology_(Earle)/09:_Earths_Interior/9.01:_Understanding_Earth_Through_Seismology
9.1: Understanding Earth Through Seismology – Geosciences LibreTexts
24 avr. 2024Figure (PageIndex{6}) Patterns of seismic wave propagation through Earth’s mantle and core. S waves do not travel through the liquid outer core, so they leave a shadow on Earth’s far side where they cannot get to. P waves do travel through the core, but because the waves that enter the core are refracted, there are also shadow zones.

https://courses.lumenlearning.com/geo/chapter/reading-body-waves

https://courses.lumenlearning.com/geo/chapter/reading-body-waves
Reading: Body Waves | Geology – Lumen Learning
P-waves travel through the earth’s interior many times faster than the speed of a jet airplane, taking only a few minutes to travel across the earth. P-waves are predominantly compressional waves. As a P-wave passes, material compresses in the same direction the wave is moving, and then extends back to its original thickness once the has …

https://manoa.hawaii.edu/exploringourfluidearth/physical/ocean-floor/layers-earth/compare-contrast-connect-seismic-waves-and-determining-earth-s-structure

https://manoa.hawaii.edu/exploringourfluidearth/physical/ocean-floor/layers-earth/compare-contrast-connect-seismic-waves-and-determining-earth-s-structure
Compare-Contrast-Connect: Seismic Waves and Determining Earth’s …
The speed at which seismic waves travel depends on the properties of the material that they are passing through. For example, the denser a material is, the faster a seismic wave travels (SF Table 7.1). P waves can travel through liquid and solids and gases, while S waves only travel through solids.

https://www.britannica.com/science/seismic-wave

https://www.britannica.com/science/seismic-wave
Seismic wave | Earth’s Interior Structure & Movement | Britannica
4 juin 2024Of the body waves, the primary, or P, wave has the higher speed of propagation and so reaches a seismic recording station faster than the secondary, or S, wave. P waves, also called compressional or longitudinal waves, give the transmitting medium—whether liquid, solid, or gas—a back-and-forth motion in the direction of the path of propagation, thus stretching or compressing the medium as …

https://earthquake.usgs.gov/earthquakes/events/1906calif/18april/earthwaves.php

https://earthquake.usgs.gov/earthquakes/events/1906calif/18april/earthwaves.php
Body waves inside the earth – USGS Earthquake Hazards Program
Body waves inside the earth. Two kinds of waves are generated by earthquakes and travel through solid rock: In P or compressional waves, the vibration of the rock is in the direction of propagation. P waves travel fastest and are the first to arrive from the earthquake. In S or shear waves, rock oscillates perpendicular to the direction of …

https://geo.libretexts.org/Courses/Lumen_Learning/Book:_Physical_Geography_(Lumen)/06:_Tectonic_Forces/6.06:_Seismic_Waves

https://geo.libretexts.org/Courses/Lumen_Learning/Book:_Physical_Geography_(Lumen)/06:_Tectonic_Forces/6.06:_Seismic_Waves
6.6: Seismic Waves – Geosciences LibreTexts
The two types of seismic waves described in Plate Tectonics, P-waves and S-waves, are known as body waves because they move through the solid body of the Earth. P-waves travel through solids, liquids, and gases. S-waves only move through solids. Surface waves travel along the ground, outward from an earthquake’s epicenter.



scienceline.ucsb.edu/getkey.php?key=5235
Why do waves change speed as they travel through earths layers?
S-waves cannot pass through liquids, and do not pass through Earth’s core because the outer core is liquid. P-waves can pass through both solids and liquids, but the speed that p-waves travel changes as they pass through layers of different rigidity (compositions and densities). Generally, p-wave velocity increases with depth and increases …
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