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- SB PROP @ ARL $ARLP013
- ARLP013 Propagation de KT7H
-
- ZCZC AP27
- QST de W1AW
- Propagation Forecast Bulletin 13 ARLP013
- >From Tad Cook, KT7H
- Seattle, WA April 2, 1994
- To all radio amateurs
-
- SB PROP ARL ARLP013
- ARLP013 Propagation de KT7H
-
- Solar flux is dropping. This week saw it dip below 90. In a few
- days it should start increasing again to peak near 105 around
- April 9. Then it should drop back to current levels about the third
- week in April.
-
- For the next few days expect increasingly disturbed conditions due
- to a recurring coronal hole. The worst conditions are predicted for
- April 5 and 6, but stormy conditions will probably last through the
- middle of the month, quieting down gradually.
-
- For the long term, the NOAA Space Environment Service Center has
- released some new observations for the rest of this cycle and the
- start of the next. They note that sunspot cycles are not exactly 11
- years, but vary around a mean of 10.2 to 11.8 years. A short
- current cycle would put the minimum around late 1996. A long cycle
- would end in late 1999. Another clue is a theory that places the
- solar minimum for any cycle about three to five years after the
- first spotless day following the peak of the cycle. That day
- occurred last fall, so the minimum should be some time from late
- 1996 to 1998.
-
- Sunspot Numbers from March 24 through 30 were 46, 56, 39, 41, 32, 23
- and 48, with a mean of 40.7. 10.7 cm flux was 92.7, 90.9, 88.5,
- 88.4, 87.6, 86.1 and 86.3, with a mean of 88.6.
-
- The path projection for this week is from Tuscaloosa, Alabama to
- Yemen.
-
- 80 meters looks good from 0030z to 0230z, and 40 meters from 2330z
- to 0330z. Check 30 meters from 2300z to 0130z, and again from 0300z
- to 0415z. 20 meters should be good from 2030z to around sundown on
- the U.S. end, and 17 meters from 1800z to sundown. 15 meters does
- not look promising, but check from 1800z to 2130z. Openings on 12
- and 10 meters look very unlikely, but are most likely in the
- afternoon.
- NNNN
- /EX
-
-