The vertical seismograph will not record a horizontal P wave approaching it as such a wave would be vibrating back and forth horizontally in the direction of propagation and therefore, would not be recordable on a vertical seismograph. This is because vertical seismographs only records vertical motion. 3.
Which seismic wave does not cause vertical movement?
Earthquake surface waves are divided into two different categories: Love and Rayleigh. Love waves have a particle motion, which, like the S-wave, is transverse to the direction of propagation but with no vertical motion.
Which wave types Cannot be detected in vertical components of seismographs?
The vertical seismograph will not record a horizontal P wave approaching it as such a wave would be vibrating back and forth horizontally in the direction of propagation and therefore, would not be recordable on a vertical seismograph. This is because vertical seismographs only records vertical motion. 3.
Which of the three types of waves can a seismograph detect?
To overcome this problem, modern seismograph stations have three separate instruments to record horizontal waves – (1) one to record the north-south waves, (2) another to record east-west waves, and (3) a vertical one in which a weight resting on a spring tends to stand still and record vertical ground motions.
Can seismographs detect both S and P waves?
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.
What are the 3 seismic wave?
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.
What four activities can trigger a tsunami?
Tsunamis are caused by violent seafloor movement associated with earthquakes, landslides, lava entering the sea, seamount collapse, or meteorite impact . The most common cause is earthquakes.
What are 4 types of seismic waves?
- Body Waves – Primary (P) & Secondary (S) Waves.
- Surface Waves – Rayleigh & Love Waves.
What are the 2 subtypes of P-waves?
Body waves are of two types: Primary waves (also called P-waves, or pressure waves) and Secondary waves (S-waves, or shear waves).
Are Love waves the slowest?
Love waves can also cause horizontal shearing of the ground. They usually travel slightly faster than Rayleigh waves, at a speed that is usually about 10% slower than S-waves , but like S-waves, they cannot spread through water. Love waves are particularly damaging to the foundations of structures.
What are the two types of body waves?
- P-waves. The first type of body wave is called the primary wave or pressure wave, and is commonly referred to as P-waves. ...
- S-waves. The second type of body wave is called the secondary wave, shear wave or shaking wave, and is commonly referred to as S-waves. ...
- Wave propagation.
What are the properties of L-waves?
L-waves, which are of great importance in earthquake engineering, propagate in a similar way to water waves, at low velocities that are dependent on frequency . S-waves are transverse body waves and thus can only be propagated...
What do you think is the most destructive type of mechanical wave?
Although surface waves travel more slowly than S-waves, they can be much larger in amplitude and can be the most destructive type of seismic wave. ... Rayleigh waves, also called ground roll, travel as ripples similar to those on the surface of water.
Where do P waves travel the fastest?
Because the earth’s mantle becomes more rigid and compressible as the depth below the asthenosphere increases, P-waves travel faster as they go deeper in the mantle. The density of the mantle also increases with depth below the asthenosphere. The higher density reduces the speed of seismic waves.
What does the P stand for in P wave?
Compressional waves are also called P-Waves, (P stands for “primary” ) because they are always the first to arrive.
What is the difference between P and S wave?
| P waves S waves | The first wave to hit seismographs Second waves to hit seismographs |
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