the seismic source

Question 1

what is green’s tensor?

Answer 1

a big equation that relates near field, farfield P wave and far field S wave patterns

Question 2

explain the saturation problem and why it matters

Answer 2

as rupture lengths increase, seismic monents, rise times and duration also increases. if you have measurement equipment sensitive to certain frequencies, you won’t see the development of these higher magnitude events happening at lower frequencies

Question 3

explain the concept of source directivity

Answer 3

when you are in front of the rupture source, you get a buildup of waves from the nearside of the fault and the far side of the fault resulting in larger amplitude and shorter duration

Question 4

how can directivity help determine a fault plane from its auxilary plane?

Answer 4

shows up on the radiation patterns - only the real fault has the skew