Hi George:

You may want to consider keeping a notebook on your symptoms. Then over a period of time you may be able to tell if any correlations exist.

To study longitude and timing data, one would retrieve a large catalog of earthquakes over a large period of time. Then you could process that data to see if any links may exist.

One question that may arise is "What process would cause such a linkage?" (assuming that one was found in the first place). For seeming links that are found, usually a theory should go along with it. Do you have any in mind ?

Speculating about a single event here and there, though interesting perhaps at times, may never lead to any understanding until it is backed with more data points that have been analyzed.

Anyway, there's the CNSS and NEIC catalogs which are accessible online if you want to take it to the next level.

Cheers,

$.02