Hey,
I'm looking at amplitude decrease of a seismic pulse as a result of geometrical spreading.
Starting with I = E / (4 * pi * r2) where E = original energy from source, we know that energy falls off as 1/r2, thus amplitude falls off as 1/r.
From wikipedia: "The energy or intensity...
"Not sure of your level of knowledge in seismology"
low I imagine, it's only been a recent attempt at moving beyond a surface level knowledge of seismology in an attempt to pursue a career in it. Currently doing some pre-study before beginning a graduate course in geophysics.
checked up on...
Hey,
Just doing some reading on this and I'm a little confused as to why absorption produces a progressive lengthening of a seismic pulse.
Quote from the textbook "In general, the effect of absorption is to produce a progressive lengthening of the seismic pulse".
I understand how the...
Okay sweet, so this is where I'm at (there are no solutions provided unfortunately).
The change in dB between site A and site B is 5dB.
A change in power ratio by a factor of 10 corresponds to a change of 10dB. Therefore the power ratio would be 10^(5/10) = 3.16 (2.d.p)
since P = A^2 the...
Homework Statement
Doing my own independent study, and I've come across a textbook question I'm rather lost on.
Problem: Over the distance between two seismic recording sites at different ranges from a seismic source, seismic waves have been attenuated by 5dB. What is the ratio of the wave...
"Now as an exercise, make sense of that with the i and k indexes and your original formula to make sure you understand what the formula is saying."
Awesome feedback. It's actually the 'exercise' I was having the most issue with, though I appreciate the strong explanation of the method of...
Yeah they have a demonstration of this on the next page of the textbook, which is easy enough to follow (although it didn't mention anything about the reversed filter which is helpful, I had wondered if it was a mistake originally).
It's just frustrating I can't get the same result using the...
Hey,
I've begun going through a book called "An introduction to geophysical exploration" by Phillip Kearey and Michael Brooks and I've come across a problem I can't for the life of me see how they got their answer.
Essentially, given an input function gi (i = 1,2... m), and a convolution...
Hey,
I've begun going through a book called "An introduction to geophysical exploration" by Phillip Kearey and Michael Brooks and I've come across a problem I can't for the life of me see how they got their answer.
Essentially, given an input function gi (i = 1,2... m), and a convolution...