ATTENUATION

Question 1

It is the reduction of the force, effect, or
value of something

Answer 1

Attenuation

Question 2

It is the reduction in the amplitude of seismic waves
as they travel away from the earthquake source

Answer 2

Attenuation

Question 3

describes the energy loss
experienced by seismic waves as they propagate. It is
controlled by the temperature, composition, melt
content, and volatile content of the rocks through
which the waves travel

Answer 3

Seismic attenuation

Question 4

FACTORS AFFECTING
ATTENUATION

Answer 4

Distance from Epicenter
Geological Conditions
Frequency of Seismic Waves

Question 5

The attenuation of seismic waves is due
to three effects:

Answer 5

Geometrical Spreading
Absorption (anelastic attenuation)
Scattering (elastic attenuation)

Question 6

PROCESS WHERE Seismic wave amplitudes vary as they travel
across the Earth.

Answer 6

Geometrical Spreading

Question 7

This is the energy loss due to anelastic processes or internal friction
during wave propagation.

Answer 7

Absorption

Question 8

is an important factor caused by the
heterogeneity of the Earth’s crust and
mantle and availability of hydrocarbon
reservoirs.

Answer 8

Scattering (elastic attenuation)

Question 9

Three Types of Scattering

Answer 9

Rayleigh Scattering
Mie Scattering
Non-Selective Scattering

Question 10

This occurs when seismic waves encounter small,
rough surfaces or irregularities in the medium.

Answer 10

Rayleigh Scattering

Question 11

This type happens when the wavelength of the seismic
waves is comparable to the size of the scattering particles or structure.

Answer 11

Mie Scattering

Question 12

This occurs when waves scatter off larger,
heterogenous structures in the medium, regardless of their wavelength.

Answer 12

Non-Selective Scattering

Question 13

Part of the total energy that is radiated away and causes
shaking

Answer 13

SEISMIC ENERGY