Weirdness in 1D model with slow gas filled rocks over fast rocks

[ben-bougher]

There seems to be some instabilities that are causing multiple large reflections?

https://www.dropbox.com/s/w1gqpupob8faedl/Screenshot%202015-11-15%2017.26.10.png?dl=0
https://www.dropbox.com/s/tvr2hgtwe3sq6ms/Screenshot%202015-11-15%2017.28.24.png?dl=0

[kwinkunks]

They both have the same polarity, so my guess is that the interface is spreading out, as it were, over two samples.

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Maybe the depth sample interval is too small? It should probably scale with the average velocity... or something.