I would expect HF/MF radio propagation conditions to worsen beginning in the
October 13-14th window. Recurrent Coronal Hole #063 will become geoeffective
(Earth facing) by the 13th.
During a previous geoeffective pass as #057 it produced a peak Kp index of 7
and a peak Ap index of 129. As #052 it p
Coronal Hole #63 arrived with a bang approximately 72 hours. It created a major
geomagnetic storm that has only now begun to wane. At it's peak the Kp reached 7 which
is major storm level and the Ap reached 106 which is at severe storm level.
Though recent indices have fallen to a Kp-3 which
