Brian queried us thusly (and rhetorically): "And what's so special about the _edge_ of the shadow zone anyway?" (just for grins, I used a usually handy add-on program called "WordWeb" to check the definition of "rhetorically." Here's the definition it provided: "In a rhetorical manner. [example:] 'What can be done?' he asked rhetorically' How's that for a circular definition?)

Well, as Shakespeare wrote: "There's the rub" (I haven't read much of Shakespeare, I just like to appear erudite).

Well, a very brief Google search using "Whiteside" and "Far field aftershocks" revealed little. I would be very interested in finding out just what is "so special" about that zone. Logically, at the margins of an unusual phenomenon, that phenomenon would be expected to diminish.

Mike Williams