Frequency

Here’s the scoop. I did a search and counted quakes with a magnitude 6 or greater:

1995 171 quakes
1996 164 quakes
1997 135 quakes
1998 125 quakes
1999 149 quakes by May 15th (is 56 at 5/16, so assuming a steady rate)

But the uptick during May 1999 is dramatic!

9 in January
11 in February
10 in March
12 in April
14 in May to 5/16 alone!

Offered by Nancy.