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I need a teaching resource that shows  

Hi Folks: Let's use this space to collectively figure out what additional teaching resources are needed to effectively teach about Seismic Waves. This could include a) collections of figures (e.g. Ed Garnero's materials)--but with the educational "wrappings" that will help us understand how the visualization was created, what the principles are, what to look for and how to extract meaning; b) lab exercises; c) demonstrations or presentations for class/lecture; d) tutorials on how to do X; e) or other resources that would make your life easier and better as an instructor. We know that a lot of great resources are "out there"--help us discover and aggregate these. We also know that you all have great stuff in your own class files--please contribute. And, we know that we need to create new resources--what are these, and who can we recruit to help create these new resources. Looking forward to your suggestions.

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In thinking about Michael Wysession's animations, I think it would be helpful if at certain points the frames were frozen and lines were drawn on top of the wavefronts identifying the type of wave.

Also, taking things a little further, it might be nice to tie wave propagation to different concepts. So, for instance, the effects of D" on the waveform could be tied to some explanation of D". Or the S multiples transitioning to Love ways in wysession6_20 could be linked to a theoretical treatment of this.

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I wonder if some concepts like SKS splitting or receiver functions could be illustrated by interactive simulations that are smaller-scale and more computational tractable, (say of the order 200 km x 200 km) in which a plane wave is imposed from the bottom. A student could input an SV or P plane-wave with a variable angle of incidence, and give a starting velocity structure. They could then could explore the P-S or S-P waveforms developed and create simple water-level receiver functions; similarly they could look at the S-wave splitting that develops. Learning goals could be to examine the effects of dipping layers, sedimentary basins, or dipping anisotropy on these traditional seismic techniques. Of course this is much easier to say than to create such a simulation.

In general, if we assume Moore's Law will still hold, it might be worth thinking of moving away from animations to user-interactive simulations.

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In my Environmental Geology class I do a unit on Energy Exploration, and of course I refer to seismic reflection as an important technique that allows us to see the subsurface. But the available images of seismic reflection are wholly inadequate for explaining what is physically happening...what are the arrows (sound waves?), and why do they magically take a right hand turn, go some distance horizontally, and then magically head to the surface again? It would be great to have an animation of the waves following their path through the Earth, with explanations about why they are translated in the pathways that they actually traverse. I would like to be able to show some seismic cross sections, e.g. the Gulf Coast, structural or stratigraphic traps, salt domes, etc. and have the students understand better how we get the images in the first place, and how to interpret them. See attached--this carries little or no meaning for students (or for me). dm

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