rjr@mgweed.UUCP (Bob Roehrig) (11/06/84)
qst de k9eui hr propagation forecast bulletin nr 45 from arrl headquarters newington ct november 5, 1984 to all radio amateurs bt during the last 5 days of october, the solar flux varied between 69 and 73 , a range characteristic of months close to the end of the 3 previous cycles for which flux records are available. despite the low solar flux, the period was marked by generally good propagation on 14 mhz and lower frequencies. 21 mhz was open over much of the world at times, but only for short periods. 28 mhz was active mainly on north south and low latitude circuits. the solar flux rose after october 29, but geomagnetic indices also rose, and propagation in the higher latitudes suffered markedly. conditions are expected to continue erratic through november tenth, becoming more stable november 11 to 15th. slightly higher flux readings should increase activity on 21 and 28 mhz at this time. degraded conditions are likely november 15 through 20. for several days after about november 21, we may have some of the best propagation of the autumn dx season. more on this possibility will be given in later bulletins. american sunspot numbers for october 25 through november 2 were between 0 and 9 with a mean of 3.6 ar
rjr@mgweed.UUCP (Bob Roehrig) (11/13/85)
qst de k9eui hr propagation forecast bulletin nr 45 from arrl headquarters newington ct november 11, 1985 to all radio amateurs bt mentioned as a possibility in last weeks bulletin, an upward trend in the solar flux curve did begin november 5. from 69 on the 4th, the flux was up to 75 by the 8th. just as it did 4 weeks earlier, the curve then dropped one unit, holding there for two days. it remains to be seen if the larger rise that began october 13 will be with us a second time. the several active centers that pushed the flux up to 95 then are due back early this week. if nothing comes of it, we will put on a corrected bulletin later this week. regardless of the flux level, propagation is likely to be very erratic but with an overall trend to better conditions through about november 20. though flux levels may be down, signal strengths and quality should average better november 20 to 25 and 26 through 28 than in the earlier part of the month. the muf for northern hemisphere paths should be the highest of the year at those intervals. the month is likely to end with strong disturbances, but with the muf lower as we move into december. the author of these bulletins is on his way to florida this week, to assume permanent residence on the gulf coast. mail for him should carry the following address, edward p. tilton, w1hdq, p.o. box 5527 spring hill, fl 33526 american sunspot numbers for october 31 through november 6 were between 0 and 14 with a mean of 3.4 ar