What are different types of seismic waves explain in detail?
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.
What are p type and S type seismic waves?
There are three basic types of seismic waves – P-waves, S-waves and surface waves. P-waves and S-waves are sometimes collectively called body waves.
What are the 3 basic waves?
Categorizing waves on this basis leads to three notable categories: transverse waves, longitudinal waves, and surface waves.
What are P waves S waves and L waves?
The PP (one bounce) and PPP (two bounces) waves travel more slowly than the direct P because they pass through shallower, lower velocity rocks. The different S waves arrive after the P waves. The slowest (and latest to arrive on seismograms) are surface waves, such as the L wave.
How are S and P waves similar?
How are S waves and P waves similar? They shake the ground. They travel through liquids. They arrive at the same time.
Which of the following describes an S wave?
An S wave, or shear wave, is a seismic body wave that shakes the ground back and forth perpendicular to the direction the wave is moving.
What are primary and secondary waves?
There are two types of seismic waves, primary waves and secondary waves. 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). Secondary waves, or S waves, are slower than P waves.
What is P waves or longitudinal waves?
P waves or Primary waves are the first waves to hit the seismographs when an earthquake strikes. They are longitudinal waves which means that the direction of motion and propagation are the same.
What are secondary seismic waves?
Secondary waves (S-waves) are shear waves that are transverse in nature. Following an earthquake event, S-waves arrive at seismograph stations after the faster-moving P-waves and displace the ground perpendicular to the direction of propagation.
What are longitudinal and transverse waves?
Transverse waves cause the medium to move perpendicular to the direction of the wave. Longitudinal waves cause the medium to move parallel to the direction of the wave.
What is Al wave?
noun Geology. an earthquake wave that travels around the earth’s surface and is usually the third conspicuous wave to reach a seismograph.
What are L waves called?
P, S and L waves refer to Primary, Secondary and Longitudinal waves. L is also the first letter in Love waves.
What are some facts about seismic waves?
Seismic waves are energy waves that are generated by an earthquake or explosion and propagate within the Earth or on its surface. Earthquakes occur when there is a movement of Earth’s tectonic plates. Seismic waves are studied by seismologists using an instrument called seismograph, which records the frequency and amplitude of the waves to
What are the three types of earthquake waves?
Types of seismic waves. There are three basic types of seismic waves – P-waves, S-waves and surface waves. P-waves and S-waves are sometimes collectively called body waves. P-waves. P-waves, also known as primary waves or pressure waves, travel at the greatest velocity through the Earth.
What causes seismic waves?
Types Of Seismic Activity. Earthquake is caused due to tectonic plate shifts as shown in the above diagram.
What are waves caused by earthquakes?
Tsunamis are water waves that are caused by sudden vertical movement of a large area of the sea floor during an undersea earthquake. Tsunamis are often called tidal waves, but this term is a misnomer. Unlike regular ocean tides, tsunamis are not caused by the tidal action of the Moon and Sun.