Friends in Radio Land -
Using Kp magnetic data with a more global reach, the quiet
days in September, with Kp-sums less than 10, were:
Sept. 10, 7, 9, 21 and 1, respectively.
while the most disturbed days, with Kp-sums greater than 30,
were:
Sept. 23, 29,30, 26 and 15, respectively.
Add the usual 27 dats for another solar rotation and you
will see how to proceed.
73,
Bob, NM7M