It should also be noted that although the conclusion that this was a collapse-type event is fairly robust, not too much detail about the exact motion or the exact mechanism of stress release can be developed with this sort of analysis.

We can't, for example, say where in a modeled cavity the collapse initiated and in what direction it propagated. Given engineering data from the mine and a detailed model of the propagation paths to the stations which recorded the events, a priori models of the collapse could be evaluated against the observed waveforms.

None of these exercises can provide much information of use to the rescuers, unfortunately :( Here's hoping there's promising news from the drill team soon...