[net.ham-radio] arrl propagation forecast bulletin nr 46

rjr@mgweed.UUCP (Bob Roehrig) (11/20/85)

qst de k9eui
hr propagation forecast bulletin 46  from arrl headquarters
newington ct  november 18, 1985
to all radio amateurs bt

beginning in the middle of october and lasting through november
16,  the  solar  flux  was higher than at the same point in the
previous solar rotation.  after a november high of  86  on  the
15th.  the  flux  dropped  to 79 by the 17th and 18th.  visible
activity on the sun was mostly in the western portion  by  this
time so anything like the october high of 95 now seems unlikely
this month.  as this bulletin is being written, 21 mhz is  full
of  life  but 28 is almost quiet, a condition we will see often
in the next two years or so.

except for low muf. propagation was  fair  to  good  after  the
first  few  days  of  november.   geomagnetic disturbances were
mostly mild. and they should have even lower intensity for  the
next nine days or so.

november 22 to 24 and 26 to 28 should be  the  best  days,  but
fairly  severe  disturbances  will  close out the month.  their
effects will be most obvious on high latitude circuits.

during october and november, conditions were fairly typical  of
what would have been expected, with nearly two years left for a
cycle of average length.  deep lows  like  those  earlier  this
year appear at seemingly random times in the late years of most
cycles for which accurate records are available  ar