Roger, I suppose I could guess what you mean by combining what is in both emails, but you mighgt want to be specific. But, you also look at M7+; I suggested M6+; not only over 1000 km away, but over 1000 km away from each other assuming there is nore than 1.

OK, 15 M7s per year, or one very 25 days more or less, so in an average week you expect to have a M7 between 1/3 and 1/4 of the time. So 5 M7s before 39 M8+ quakes is less than expected.

Chris