Assume that Qµ = 100 for the inner core and is constant with frequency, that all of the attenuation is in shear (Qκ = ∞), that α = 11 km/s and β = 3.5 km/s (at 1 s period) throughout the inner core,...



Assume that Qµ = 100 for the inner core and is constant with frequency, that all


of the attenuation is in shear (Qκ = ∞), that α = 11 km/s and β = 3.5 km/s (at 1 s


period) throughout the inner core, and that the inner-core radius is 1221.5 km.


(a) What are Qα and Qβ for the the inner core?


(b) For a P wave that travels straight through the Earth (i.e., travels a distance


twice the radius), how much will amplitudes be attenuated in the inner core


for waves of 100 s, 10 s, and 1 s period? By how many seconds will the total


travel time through the inner core vary as a function of these periods?


(c) Repeat (b) for the case of S waves.



May 26, 2022
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