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- SB PROP @ ARL $ARLP021
- ARLP021 Propagation de KT7H
-
- ZCZC AP35
- QST de W1AW
- Propagation Forecast Bulletin 21 ARLP021
- >From Tad Cook, KT7H
- Seattle, WA May 27, 1994
- To all radio amateurs
-
- SB PROP ARL ARLP021
- ARLP021 Propagation de KT7H
-
- Solar flux was down this past week. From May 20 through 23
- geomagnetic conditions were quiet, with the A index below ten each
- day, and K indices at one or zero about 25 percent of the time.
-
- While solar flux is declining again, geomagnetic disturbances are
- expected to rise. Look for solar flux to drop to around 70 after
- the first of the month, and disturbed geomagnetic conditions caused
- by a recurring coronal hole to peak around May 31 and again on June
- 3. The high A and K values should gradually taper off, but probably
- won't reach normal until mid June.
-
- We could see some disturbed conditions during the WPX CW Contest
- this weekend, with the A index rising to 20 or 30.
-
- Soon we will be seeing a shift to Summer radio conditions, with
- higher noise levels on the low bands, increase in sporadic-E short
- skip propagation on higher frequencies, lower optimum frequencies
- for daytime propagation, and improving high frequency propagation
- during the evening.
-
- Last week there was an error in the mean value given for solar flux.
- Instead of 89.8 it was really 91.2.
-
- Sunspot Numbers from May 19 through 25 were 48, 35, 35, 31, 26, 22
- and 12, with a mean of 29.9. 10.7 cm flux was 90.6, 89.8, 87.7,
- 84.6, 81, 77.9 and 74.2, with a mean of 83.7.
-
- The path projection for this week is from Bridgeville, Delaware to
- the Aland Islands, OH0.
-
- 80 meters should be open from 0100 to 0230z and 40 meters from
- 2330 to 0500. 30 meters may be open most days from 2230 to
- 0100, and every day from 0330 to 0600. 20 meters should be open
- most days from 1830 to 2030, and some days may open as early as
- 1500. Conditions do not look good at this time for frequencies
- above 20 meters.
- NNNN
- /EX
-
-