Seismology helps us understand the origin and intensity of earth rsquo s interior Consider the follo...........

Geography Earth Geology

Seismology helps us understand the origin and intensity of earth’s interior. Consider the following statements regarding Seismic waves?

1.All seismic waves are mechanical waves and require medium to propagate.

2.Their behavior change with the change in medium.

Choose the correct option?

1 only

2 only

Both

None

छोटे Courses बड़े Results

Master Earth Geology

Prepare through Micro-courses

Try Now

Explanation:

Seismic waves are waves of energy that travel through the Earth's layers, and are a result of earthquakes, volcanic eruptions, magma movement, large landslides and large man-made explosions that give out low-frequency acoustic energy. Seismic wave fields are recorded by a seismometer, hydrophone (in water), or accelerometer.
The propagation velocity of the waves depends on density and elasticity of the medium. Velocity tends to increase with depth and ranges from approximately 2 to 8 km/s in the Earth's crust, up to 13 km/s in the deep mantle. The refraction or reflection of seismic waves is used for research into the structure of the Earth's interior, and man-made vibrations are often generated to investigate shallow, subsurface structures.