ARRL

ARRL Propagation Bulletin ARLP041 (2002)

SB PROP @ ARL $ARLP041
ARLP041 Propagation de K9LA

ZCZC AP41
QST de W1AW  
Propagation Forecast Bulletin 41  ARLP041
From Carl Luetzelschwab, K9LA
Fort Wayne, IN  October 4, 2002
To all radio amateurs 

SB PROP ARL ARLP041
ARLP041 Propagation de K9LA

Carl Luetzelschwab, K9LA is filling in this week for Tad Cook,
K7VVV.

This report is for the period Friday September 27 through Thursday
October 3.

Geomagnetic field activity during the period ranged from quiet to
severe storm. Several coronal mass ejections around the first of the
week caused elevated K and A indices beginning mid week, along with
the resultant geomagnetic storms as the interplanetary magnetic
field turned south. Auroral displays, degraded propagation on the
higher HF bands and some interesting 6-meter openings were noted
during the stormy times.

There were no significant proton events during the period.

X-ray flare activity during the period ranged from low to moderate.
The largest X-ray flares were M2 events on Sunday, Monday, and
Thursday. These flares did not cause any significant radio
blackouts.

As K7VVV has mentioned in previous bulletins, the higher bands (15,
12 and 10-meters) will offer excellent worldwide openings as we
progress through Fall and into Winter. Now is the time to enjoy
these bands-before Cycle 23 gets too far down its inevitable
decline.

Sunspot numbers for September 26 through October 2 were 157, 185,
140, 146, 94, 105, and 99, with a mean of 132.3. 10.7 cm flux was
149.9, 151.6, 148.6, 138.1, 139.7, 139.8, and 135.8, with a mean of
143.4. Estimated planetary A indices were 8, 8, 8, 6, 26, 60, and
44, with a mean of 22.9.
NNNN
/EX