QST de W1AW
Propagation Forecast Bulletin 40 ARLP040
Seattle, WA September 22, 1995
To all radio amateurs
SB PROP ARL ARLP040
ARLP040 Propagation de KT7H
Average solar flux and sunspot numbers were up just a few points this week over last. Geomagnetic activity was quite low, except for September 15, when the A index went to 18.
Solar flux may peak for the short term this weekend around 80, then drift back toward a minimum near 70 stretched over the first half of October. Look for active geomagnetic conditions from a coronal hole which returns October 2 through 5.
We are now moving into Fall, which should bring some seasonal improvement in propagation, although solar activity is so low during this part of the cycle that HF propagation is depressed.
Sunspot Numbers for September 14 through 20 were 0, 15, 11, 0, 0, 18 and 20, with a mean of 9.1. 10.7 cm flux was 69.5, 70.1, 69.6, 69.8, 71.6, 73.6 and 75.5, with a mean of 71.4.