Seismic Scattering: Topography, Faulting, Fluid/Melt

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Discussion Overview

The discussion focuses on the effects of topography, faulting, and the presence of fluid or melt on seismic scattering. Participants explore how these factors influence the interaction of seismic waves with geological structures, with an emphasis on understanding the underlying mechanisms involved.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • Some participants note that seismic scattering occurs due to the interaction of wavefields with heterogeneities comparable in scale to the incident wavelength, but the specific effects of topography, faulting, and fluid/melt remain unclear.
  • One participant suggests that topography introduces geometric effects and differences in interfaces between various media, which may influence scattering.
  • Another participant questions the significance of faults and the differences between fluid or molten rock and solid rock, particularly regarding sound speed and elastic properties.

Areas of Agreement / Disagreement

Participants express uncertainty regarding the specific impacts of topography, faulting, and fluid/melt on seismic scattering, indicating that multiple competing views remain without a consensus.

Contextual Notes

Participants have not fully explored the assumptions or definitions related to the effects of the discussed factors on seismic scattering, and there are unresolved questions about the mechanisms involved.

bert2002
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How do the following affect seismic scattering ?

1) topography
2) faulting
3) fluid and melt

Any scientific sources are appreciated, thanks
 
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bert2002 said:
How do the following affect seismic scattering ?

1) topography
2) faulting
3) fluid and melt

Any scientific sources are appreciated, thanks

What have you found in your reading so far?
 
I know that seismic scattering occurs as a result of the wavefield interaction with a heterogeneity that is of a similar scale length to the incident wavelength, but i do not know how each of these particular entities has an effect, if at all ?
 
OK I am not going to do them all for you, since I am sure you really do know how to use google

put your questions into google one at a time ... I did the first one for you

how does topography affect seismic scattering ?

and as an example, got ...

http://www.lpi.usra.edu/meetings/lpsc2011/pdf/1961.pdf

now have a play and see what else you can find :)

cheers
Dave
 
Topography would be a geometric effect, in addition to differences in interfaces between different media.

What is a fault?

What is the significance of fluid or molten rock - as compared to solid rock? Think about the speed of sound and elastic properties?
 

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