Table of Contents
What is the motion of primary wave?
Seismic P waves are also called compressional or longitudinal waves, they compress and expand (oscillate) the ground back and forth in the direction of travel, like sound waves that move back and forth as the waves travel from source to receiver.
How do primary waves move the rocks through which they travel?
Explanation: Primary waves (p-waves) are longitudinal or compression waves, so the rock is oscillating parallel to the direction of travel of the wave. These are transverse waves (their displacement is perpendicular to the direction of motion of the wave) so cause the ground to shake back and forth.
Do primary waves move in all directions?
P and S waves travel through the planet Earth after an earthquake. A simplified diagram shows the S waves on the left and the P waves on the right, but waves of both types would actually radiate in all directions.
How do rock particles move during the passage of a primary wave P wave?
Primary waves are the fastest seismic waves. They move through the rock via compression, very much like sound waves move through the air. Particles of rock move forward and back during the passage of the P waves. Primary waves can travel through both fluids and solids.
What is the motion of the secondary wave?
The S-wave (secondary or shear wave) follows more slowly, with a swaying, rolling motion that shakes the ground back and forth perpendicular to the direction of the wave.
How is primary wave related to secondary wave?
Primary waves, also known as P waves or pressure waves, are longitudinal compression waves similar to the motion of a slinky (SF Fig. 7.1 A). The motion of secondary waves is perpendicular to the direction of the wave travel, similar to the motion of vigorously shaking a rope (SF Fig.
How do Rayleigh waves move?
Rayleigh Waves—surface waves that move in an elliptical motion, producing both a vertical and horizontal component of motion in the direction of wave propagation. Particle motion consists of elliptical motions (generally retrograde elliptical) in the vertical plane and parallel to the direction of propagation.
In what directions do the surface waves move?
They move the ground from side to side in a horizontal plane but at right angles to the direction of propagation.
Where do primary and secondary waves move outward from?
Both P and S waves travel outward from an earthquake focus inside the earth. The waves are often seen as separate arrivals recorded on seismographs at large distances from the earthquake. The direct P wave arrives first because its path is through the higher speed, dense rocks deeper in the earth.
How do secondary waves move?
It forces the ground to move backwards and forwards as it is compressed and expanded. The S-wave (secondary or shear wave) follows more slowly, with a swaying, rolling motion that shakes the ground back and forth perpendicular to the direction of the wave.
How do rock particles move during the passage of a wave through the rock Mcq?
How do rock particles move during the passage of a P wave through the rock? up and down perpendicular to the direction of wave travel.
What is primary waves and secondary wave?
The P-wave (primary or pressure wave) is a pulse of energy that travels quickly through the earth and through liquids. The S-wave (secondary or shear wave) follows more slowly, with a swaying, rolling motion that shakes the ground back and forth perpendicular to the direction of the wave.