*Find the 'permanent' return to peak (it turns out that you can go from crash to crash).
*Calculate area lost in point-days and percent-days.
==Exploring Complexity==
[https://en.wikipedia.org/wiki/Self-organized_criticality Self-Organizing Criticality], which gives rise to [https://en.wikipedia.org/wiki/Scale_invariance Scale Invariance], might provide a model. See the [https://en.wikipedia.org/wiki/Abelian_sandpile_model Abelian sandpile model] as a place to start.