All Questions
Tagged with seismology waves
16 questions
4
votes
0
answers
111
views
Book recommendation on waves
I am looking for a book about waves in the context of Earth Science, the two main topics I have in mind are ocean waves and seismic waves.
Explanations in a book like Understanding earth1 is too ...
1
vote
1
answer
329
views
Horizontal slowness in seismology
I am working on a seismology assignment and it starts with the fundamentals of seismology such as the wave equation, the slowness... such as the question below:
write an equation describing the ...
- 161
1
vote
1
answer
158
views
What would be the phase shift and polarity of a seismic wave upon reflection
What would be the phase shift and polarity of a seismic wave a) when it hit the free surface
b)when the free surface reflection goes down and hit a reflector and returned to the receiver placed on the ...
- 111
2
votes
2
answers
251
views
wave speed is smaller than both horizontal wave speed and vertical wave speed?
I am new to GIS and just get the idea of slowness. I can understand why people need the slowness in GIS rather than just the reciprocal of velocity. However, I feel the definition of slowness is weird ...
- 121
2
votes
1
answer
160
views
reverse time migration for wave equation PDE using SBP-SAT
I'm stuck implementing a reverse time migration technique, the PDE(partial differential equation) being implemented is an acoustic wave equation, The numerical method being used is a FD(finite ...
- 21
6
votes
1
answer
898
views
How does multiple layer seismic reflection work? How do we distinguish arrivals from different layers and their velocities?
Whenever we are investigating multiple layer interfaces in a seismic reflection survey the root-mean-squared velocity is often employed to deduce travel time to a certain n-th layer and also to deduce ...
- 303
3
votes
2
answers
2k
views
Travel Times for Seismic Wave Types - Why reflected t-x plot curves
I do not understand how the reflected wave in a seismic survey has a steepening slope (slows down) Please bear with me as I lay out my thoughts because I feel like I can grasp all of this except this ...
- 303
7
votes
1
answer
1k
views
Analytical solution for seismic wavefield in MATLAB
I have been trying to evaluate the analytical solution for a wave travelling in a homogeneous, infinite media. For a given source $S(t)$, the wave-field can be calculated at a distance $r$, for a ...
- 347
4
votes
1
answer
1k
views
Detecting seismic waves using Software Defined Radio
I understand about physic and waves, but I am a totally rookie in this topic. I was wondering which are the typical frequency ranges of the S-waves, P-waves and surface waves.
My idea would be to ...
- 43
7
votes
1
answer
2k
views
What is the meaning of seismic spectral blueing?
What is the meaning of seismic spectral blueing? Please cite any good introductory materials if possible.
- 823
10
votes
1
answer
3k
views
How does one determine the optimum offset in a seismic survey?
I was going through a report on MASW (Multi Station Analysis of Surface Wave) and found this
"To avoid the aliasing in the space domain, geophone spacing (Δx) needs to be less than half of the ...
- 1,489
12
votes
1
answer
2k
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Should one extract wavelet from seismic or well log for the generation of synthetic traces?
Synthetics are generated by convolving reflectivity series with the known wavelet. I have seen most of the wavelet are extracted from seismic data itself. Is there any hard and fast rule, or can one ...
- 823
13
votes
1
answer
7k
views
P wave to S wave conversion
While passing through layers inside the earth some P waves get converted to S waves and then back to P waves while returning towards the surface. Is this statement true?
If yes, then why? (...
- 131
14
votes
2
answers
740
views
Why is a seismogram interpreted as a convolution?
I remember reading in a geology book that a seismogram is a convolution between a source signal and propagation effects. In layman's terms, what does this really mean?
- 1,151
23
votes
3
answers
13k
views
How to distinguish P, S, Love, and Rayleigh waves in a seismogram?
What features should I look for to determine each of these kinds of waves in a seismogram? What signal processing methods (filters, transforms, etc...) should I use to determine them?
- 1,151
22
votes
1
answer
158
views
Placement of crustal thickness estimation from 1D inversion of surface wave dispersion curves
Seismic surface waves present a characteristic dispersion behavior in which different frequencies travel at different speeds. This characteristic dispersion curve depends on the shear and ...
- 883