SB PROP @ ARL $ARLP013<br />ARLP013 Propagation de K7RA<br /><br />ZCZC AP13<br />QST de W1AW <br />Propagation Forecast Bulletin 13 ARLP013<br />>From Tad Cook, K7RA<br />Seattle, WA March 28, 2003<br />To all radio amateurs <br /><br />SB PROP ARL ARLP013<br />ARLP013 Propagation de K7RA<br /><br />Solar flux and sunspot numbers declined again this week. Average<br />daily solar flux was down over 31 points to 100.6, and average daily<br />sunspot numbers were down nearly 30 points to 62.4. Solar flux was<br />lowest on Saturday, March 22 at 89. Solar flux has not been this low<br />since 1998 when it was 89 on May 21 and 87.4 the following day.<br /><br />Geomagnetic conditions were still active this week but finally<br />settled down after March 23. Currently on Thursday the earth is<br />again in a solar wind stream from a coronal hole. The best guess is<br />for unsettled geomagnetic activity over the next few days, but no<br />severe storm. The predicted planetary A index for Friday through<br />Monday is 15, 12, 12 and 15.<br /><br />A few days ago the sun was almost devoid of spots, but more have now<br />rotated into view. Predicted solar flux for Friday through Monday is<br />150, 155, 155 and 150. Unless new activity emerges, based upon the<br />current solar rotation solar flux values below 100 may return by<br />mid-April. Propagation relative to recent conditions should be<br />fairly good for the CQ World Wide SSB WPX Contest this weekend.<br /><br />Jon, N0JK of Wichita Kansas reported good 6-meter conditions while<br />geomagnetic indices were again active today. He reports that Diego,<br />HC8/LU8ADX on San Cristobal Island in the Galapagos was working U.S.<br />stations coast to coast around 2015-2130z. Diego peaked at S-9 at<br />Jon's location, and Jon worked him at 2048z running 10 watts or less<br />into a dipole.<br /><br />A month ago during another period of geomagnetic activity Jon<br />submitted a report that the HC8GR beacon on Galapagos was loud at<br />his QTH, and K2RTH/4 heard the LU9EHF beacon from Miami. Readers can<br />submit reports of interesting propagation via email to k7ra@arrl.net.<br /><br />Tomas Hood, NW7US has developed some interesting methods for<br />delivering propagation data. Go to his web site at<br />
http://hfradio.org where you can sign up for email alerts,<br />propagation data delivered to an RSS headline reader program, or WAP<br />enabled wireless device.<br /><br />Sunspot numbers for March 20 through 26 were 45, 40, 40, 43, 64, 89,<br />and 116, with a mean of 62.4. 10.7 cm flux was 97.4, 91, 89, 93,<br />97.8, 108.8, and 127.2, with a mean of 100.6. Estimated planetary A<br />indices were 21, 29, 16, 24, 10, 6, and 8, with a mean of 16.3.<br />NNNN<br />/EX
