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Highlighting the different types of earthquake waves, discuss the emergence of shadow zones.
Earthquake waves also referred as the Seismic Waves. Two main types of seismic waves are generated during the quakes are as follows: Body Waves – Originated from focal point & spreads through the body of the Earth. These further divided into two types: P waves and S waves. P / PrimaRead more
Earthquake waves also referred as the Seismic Waves. Two main types of seismic waves are generated during the quakes are as follows:
S / Secondary / Transverse / Shaking waves – Travelling through solid only & changes occurs only in shape & not in volume. Slower than P waves. Mode of propagation is back & forth at the right angle to the direction of motion of the wave. It “shakes” the particles at the right angle to their direction of travel, hence also known as Shear waves.
- Surface / Destructive Waves originated along a shallow fault & produce major damages & travels with low speeds and intensity. Surface waves are divided into two types: L / Love Waves – With greater wavelength & also known as Long Waves. Originated from epicenter & cause rock to move side by side. Perpendicular to the direction in which the waves are travelling. Rayleigh Waves – are causing the rocks/ground to move with elliptical or rolling movements.
- Emergence of Shadow zones – Sudden changes in the speed of seismic waves are known as the Seismic Discontinuities. It helps in discovery of fundamental inference in the material of the Earth’s interior by analyzing the arrival time of the P waves.P wave traveled a relatively slow route through the material within about 20 km of surface. Second P waves were traveled at the greater depth & reached at the deeper zone where the velocity of the P waves abruptly increased.
See lessRefraction phenomenon shown by the seismic waves, and tend to refracted at boundaries within the earth, at the Core-Mantle Boundary (CMB). The place on Earths part where no Body waves detected is generally called as the Shadow Zone which is existed because the material of the earth’s interior is not uniform in rigidity.
When seismic wave’s changes its speed is depend upon the rigidity of the Earth’s interior. Wave is also bending & changes their directions as they pass through the different material. S wave does not travel through the liquid; they are disappearing at the CMB.
P wave can travel through all layers of the earth, the speed & direction of the P wave change as the wave pass through each medium or layer. The wave bends in such a way that P wave shadow zone is formed.
Shadow Zone covers the side of the Earth that is opposite an earthquake / seismic source. It covers the angular distance from the seismic source to the shadow zone is 105˚ on either side, so the total angular distance is the 145˚.
Highlighting the different types of earthquake waves, discuss the emergence of shadow zones.
Earthquake waves also referred as the Seismic Waves. Two main types of seismic waves are generated during the quakes are as follows: Body Waves – Originated from focal point & spreads through the body of the Earth. These further divided into two types: P waves and S waves. P / PrimaRead more
Earthquake waves also referred as the Seismic Waves. Two main types of seismic waves are generated during the quakes are as follows:
S / Secondary / Transverse / Shaking waves – Travelling through solid only & changes occurs only in shape & not in volume. Slower than P waves. Mode of propagation is back & forth at the right angle to the direction of motion of the wave. It “shakes” the particles at the right angle to their direction of travel, hence also known as Shear waves.
- Surface / Destructive Waves originated along a shallow fault & produce major damages & travels with low speeds and intensity. Surface waves are divided into two types:
-
See lessL / Love Waves – With greater wavelength & also known as Long Waves. Originated from epicenter & cause rock to move side by side. Perpendicular to the direction in which the waves are travelling. Rayleigh Waves – are causing the rocks/ground to move with elliptical or rolling movements.
Emergence of Shadow zones – Sudden changes in the speed of seismic waves are known as the Seismic Discontinuities. It helps in discovery of fundamental inference in the material of the Earth’s interior by analyzing the arrival time of the P waves.
P wave traveled a relatively slow route through the material within about 20 km of surface. Second P waves were traveled at the greater depth & reached at the deeper zone where the velocity of the P waves abruptly increased.
Refraction phenomenon shown by the seismic waves, and tend to refracted at boundaries within the earth, at the Core-Mantle Boundary (CMB). The place on Earths part where no Body waves detected is generally called as the Shadow Zone which is existed because the material of the earth’s interior is not uniform in rigidity.When seismic wave’s changes its speed is depend upon the rigidity of the Earth’s interior. Wave is also bending & changes their directions as they pass through the different material. S wave does not travel through the liquid; they are disappearing at the CMB.
P wave can travel through all layers of the earth, the speed & direction of the P wave change as the wave pass through each medium or layer. The wave bends in such a way that P wave shadow zone is formed.
Shadow Zone covers the side of the Earth that is opposite an earthquake / seismic source. It covers the angular distance from the seismic source to the shadow zone is 105˚ on either side, so the total angular distance is the 145˚.