GEOLOGY

EARTH SCIENCE

EARTHQUAKES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The type of seismic waves that arrive at a seismic station first and move by compressing and expanding the ground like an accordian are called
A
S waves
B
surface waves
C
tsunami waves
D
primary waves
Explanation: 

Detailed explanation-1: -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. P waves can move through solid rock and fluids, like water or the liquid layers of the Earth.

Detailed explanation-2: -P waves are seismic waves that compress and expand the ground like an accordion.

Detailed explanation-3: -The P wave is designated the primary preliminary wave because it is the first to arrive at a seismic station after an earthquake. It travels at a speed usually less than 6 kilometers per second in the Earth’s crust and jumps to 13 kilometers per second through the core.

Detailed explanation-4: -In P or compressional waves, the vibration of the rock is in the direction of propagation. P waves travel fastest and are the first to arrive from the earthquake.

Detailed explanation-5: -P-waves, or primary waves, are the fastest moving type of wave and the first detected by seismographs. They are also called compressional or longitudinal waves, and push and pull the ground in the direction the wave is traveling.

There is 1 question to complete.