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The P (primary) seismic waves are also longitudinal. In a longitudinal wave, each particle of matter vibrates about its normal rest position and along the axis of propagation, and all particles participating in the wave motion behave in the same manner, except that there is a…
|P waves||S waves|
|Type of wave||Longitudinal||Transverse|
|Can travel through||Solids and liquids||Solids only|
There are two broad classes of seismic waves: body waves and surface waves. Body waves travel within the body of Earth. They include P, or primary, waves and S, or secondary, waves. P waves cause the ground to compress and expand, that is, to move back and forth, in the direction of travel.
S waves, also called shear or transverse waves, cause points of solid media to move back and forth perpendicular to the direction of propagation; as the wave passes, the medium is sheared first in one direction and then in another.
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 direction the wave is moving.
Earthquake waves under Earth’s surface have both longitudinal and transverse components as well. The longitudinal waves in an earthquake are called pressure or P-waves, and the transverse waves are called shear or S-waves.
Body waves are of two types: Primary waves (also called P-waves, or pressure waves) and Secondary waves (S-waves, or shear waves). P-waves are compression waves.
The P wave is designated the primary preliminary wave because it is the first to arrive at a seismic station after an earthquake.
There are three major kinds of seismic waves: P, S, and surface waves. P and S waves together are sometimes called body waves because they can travel through the body of the earth, and are not trapped near the surface.
Sound and P waves are longitudinal mechanical (or compression) waves with oscillations which are parallel to the direction of propagation. Transverse waves (such as visible light and electromagnetic radiation) have oscillations which are perpendicular to the direction of wave propagation.
Common types of mechanical waves include sound or acoustic waves, ocean waves, and earthquake or seismic waves. In order for compressional waves to propagate, there must be a medium, i.e. matter must exist in the intervening space.
Seismic surface waves travel along the Earth’s surface. They can be classified as a form of mechanical surface waves.
We call traveling compression waves in liquids “longitudinal waves,” in contrast to “transverse waves” typified by a vibrating string. The direction that the material moves, relative to the direction of wave propagation, makes the difference.
In this type of wave, matter in the medium moves back and forth at right angles to the direction that the wave travels. A wave in the ocean moves horizontally, but the water that the wave passes through moves up and down. … Compressional waves also are called longitudinal waves.
The wave is seen as the motion of the compressed region (ie, it is a pressure wave), which moves from left to right.
The slowest waves, surface waves, arrive last. They travel only along the surface of the Earth. There are two types of surface waves: Love and Rayleigh waves.
There are several different kinds of seismic waves, and they all move in different ways. The two main types of waves are body waves and surface waves. Body waves can travel through the Earth’s inner layers, but surface waves can only move along the surface of the planet like ripples on water.
A seismograph, or seismometer, is an instrument used to detect and record earthquakes.
A seismograph, or seismometer, is an instrument used to detect and record seismic waves. Seismic waves are propagating vibrations that carry energy from the source of an earthquake outward in all directions. They travel through the interior of the Earth and can be measured with sensitive detectors called seismographs.
Seismographs are instruments used to record the motion of the ground during an earthquake. … As the seismograph shakes under the mass, the recording device on the mass records the relative motion between itself and the rest of the instrument, thus recording the ground motion.
Seismographs can detect quakes that are too small for humans to feel. During an earthquake, ground-shaking seismic waves radiate outward from the quake source, called the epicenter. Different types of seismic waves travel at different speeds and through different parts of the Earth during a quake.
- P-wave Motion. P-wave:the primary body wave; the first seismic wave detected by seismographs; able to move through both liquid and solid rock. …
- S-wave Motion. …
- Rayleigh-wave Motion. …
- Love-wave Motion.
Rayleigh waves are a type of surface wave that travel near the surface of solids. Rayleigh waves include both longitudinal and transverse motions that decrease exponentially in amplitude as distance from the surface increases.
Longitudinal waves show areas of compression and rarefaction : compressions are regions of high pressure due to particles being close together. rarefactions are regions of low pressure due to particles being spread further apart.
A rarefaction is a point on a medium through which a longitudinal wave is traveling that has the minimum density. … While a transverse wave has an alternating pattern of crests and troughs, a longitudinal wave has an alternating pattern of compressions and rarefactions.
Compression- a region in a longitudinal (sound) wave where the particles are closest together. • Rarefaction- a region in a longitudinal (sound) wave where the particles are furthest apart.
Seismic waves are mechanical waves because they travel through the medium of the Earth.
The medium for seismic waves is the Earth. A medium is any substance that a wave travels through. Since seismic waves travel through Earth, this is their medium.
Seismic waves can be classified into two basic types: body waves which travel through the Earth and surface waves, which travel along the Earth’s surface. Those waves that are the most destructive are the surface waves which generally have the strongest vibration.
There are several different kinds of seismic waves, and they all move in different ways. The two main types of waves are body waves and surface waves. Body waves can travel through the earth’s inner layers, but surface waves can only move along the surface of the planet like ripples on water.
Seismic waves – the same tool used to study earthquakes – are frequently used to search for oil and natural gas deep below Earth’s surface. These waves of energy move through the Earth, just as sound waves move through the air.
Tremors or vibrations caused by the earthquakes which travel in the form of waves within the earth or along the earth’s surface, are called seismic waves. Seismograph is an instrument which records these waves.
A longitudinal wave consists of a repeating pattern of compressions and rarefactions.
In compressional waves, the particle motion is in the direction of propagation. In shear waves, the particle motion is perpendicular to the direction of propagation.
Light waves (electromagnetic radiation) are transverse waves. Compressional or longitudinal waves cause oscillating motion along the direction of the wavefront, where the particle density oscillates as they are compressed and expanded. … Light waves are transverse waves while acoustic are longitudinal.