What is an SH wave?
1. n. [Geophysics] A shear wave that is polarized so that its particle motion and direction of propagation are contained in a horizontal plane.
What is SH and SV wave?
SV: Shear waves with displacement in the vertical x − z plane. SH: Shear waves with displacement in the horizontal x − y plane.
How do seismic waves propagate?
Seismic wavefields propagate through the Earth in two ways: body waves and surface waves. Body waves propagate in the interior (body) of the Earth and illuminate deep geologic targets. These waves generate the reflected P, SH, and SV signals that are needed to evaluate prospects and to characterize reservoirs.
What are seismic waves types?
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. Earthquakes send out seismic energy as both body and surface waves.
What is P SV wave?
P denotes a seismic compressional wave; SV is a converted shear mode.
Why are electromagnetic waves transverse?
Electromagnetic waves are also transverse waves because the direction of particle displacement is also perpendicular to the direction of movement, producing the waveform of visible light, and other types of electromagnetic radiation.
Is light is a transverse wave?
transverse wave, motion in which all points on a wave oscillate along paths at right angles to the direction of the wave’s advance. Surface ripples on water, seismic S (secondary) waves, and electromagnetic (e.g., radio and light) waves are examples of transverse waves.
What are the 4 types of seismic waves?
Love Waves—surface waves that move parallel to the Earth’s surface and perpendicular to the direction of wave propagation..
- 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.
What is the velocity variation of a SH wave?
SH-wave For SH-waves, any transversely isotropic model is elliptical, with the velocity variation governed by the parameter γ (Chapter 1). (2.16)Ranis,SH(θ)=12(γ2−γ1)tan2θ. Equation (2.16)is similar to the SV-wave expression (2.14) discussed above, but the relevant anisotropic parameter for SH-waves is γ.
What is the transmission and reflection coefficient of a SH wave?
For an SH wave, assuming Snell’s law allows a transmitted wave, the transmission coefficient (which is the ratio of the amplitude of the transmitted wave, AT, to the amplitude of the incoming wave, A0) is and the reflection coefficient (which is the ratio of the amplitude of the reflected wave, AR, to the amplitude of the incoming wave) is
What does SH-wave stand for?
The horizontally polarized shear-wave (SH-wave) seismic method was also employed for CDP profiling, but used a 12-channel land streamer (Pugin et al., 2004) pulled by a vehicle. The 12 14-Hz horizontal geophones were spaced at 1.52 m.
When a SH wave is reflected from a free surface?
When an SH wave is reflected from a free surface, the ‘free surface amplification’ is a factor of two. All of the energy is reflected, and the wave is described as a sum of the incoming and reflected wave, each with the amplitude of the incoming wave.