Hi John;

Jim started predicting in 1974 after testing in 1973

So taking the 1900-1973 period for mag 7+ quakes and a 6 day window, I find 1831 syzygys, 147 supermoons, 1244 quakes, 43 hits and 0.231 chance of success.

Then taking the 1974-2007 period, I find 841 syzygys, 70 supermoons, 485 quakes, 17 hits and 0.200 chance of success.

The two results are both better than chance but it looks like his predictions made things worse!

Roger