I did not go back and re-read the links to the original posts, but it is very clear that Petra and Don haved linked to 2 completely and different butterflies......I think Petra's is the one that was referred to...the pattern in map view of fault weakening vs fault strengthening after a previous nearby quake (static stress changes...an idea that Lowell Whiteside had in his Comps in 1990...). The butterfly effect is something else....that a butterfly flapping its wings in one part of the world can cause a major event in another part (take your choice...tornado, hurricane,,,,).
Chris