EARTH SCIENCE
EARTHQUAKES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Primary Wave
|
|
|
Secondary Wave
|
|
|
Long Wave
|
|
|
None of the above
|
Detailed explanation-1: -P waves travel fastest and are the first to arrive from the earthquake. In S or shear waves, rock oscillates perpendicular to the direction of wave propagation. In rock, S waves generally travel about 60% the speed of P waves, and the S wave always arrives after the P wave.
Detailed explanation-2: -P Waves. The first kind of body wave is the P wave or primary wave. It’s the fastest kind of seismic wave, and the first to arrive at a seismic station.
Detailed explanation-3: -Light waves move the fastest in vacuum with a speed of about 3 × 10 8 m / s .
Detailed explanation-4: -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.
Detailed explanation-5: -The P wave, or primary wave, is the fastest of the three waves and the first detected by seismographs.