‰ Now 18 WPM transition file follows ‰ After a few days in the doldrums on April 8 to 13 with sunspot numbers in the double digits, solar activity made a strong recovery over the following three days, with daily sunspot numbers of 105, 149 and 245. Sunspot numbers have reached this level several times in the past 12 months. On February 28, 2014 the daily sunspot number reached 279, it was 245 on January 6, and back on November 15 to 17, 2013 it was 272, 213 and 282. The average daily sunspot number was actually down this week compared to last, dropping from 129.3 to 118.4. Average daily solar flux was higher, rising from 142.2 to 149.1. There was one geomagnetically active day, when the planetary A index reached 25 on April 12. This was caused by a solar wind stream. Predictions for solar flux made a big leap yesterday, when it was predicted to be 190 on April 17 to 19, 185, 180 and 175 on April 20 to 22, 170 on April 23 and 24, 140 on April 25 to 27, 130 on April 28 and 29, 125 on April 30, 120 on May 1 and 2, 125 on May 3 to 5 then peaking at just 145 on May 12 to 19. Predicted planetary A index is 8 on April 17 and 18, 5 on April 19 to May 10, 8 on May 11 and 12, then 5 for the remaining days of the 45 day forecast period. For the first time in many years, WWV again is transmitting on 25 MHz, on an experimental basis. For the latest status in the 25 MHz broadcast, refer to the NIST Radio Station WWV web site at //www.nist.gov/pml/div688/grp40/wwv.cfm . If you would like to make a comment or have a tip for our readers, email the author at, k7ra at arrl.net. For more information concerning radio propagation, see the ARRL Technical Information Service web page. A detailed explanation of the numbers used in this bulletin is also available on this site. An archive of past propagation bulletins is also available. Monthly propagation charts between four USA regions and twelve overseas locations can be found on the W1AW web site. Find more good information and tutorials on propagation on the k9la web site. The multiple websites mentioned in this bulletin can be found in teleprinter, packet and Internet versions of 2014 Propagation Forecast Bulletin ARLP016. Sunspot numbers were 78, 83, 74, 95, 105, 149, and 245, with a mean of 118.4. 10.7 cm flux was 136.7, 137.6, 135.9, 137.1, 150.3, 161.9, and 183.9, with a mean of 149.1. Estimated planetary A indices were 3, 8, 25, 16, 8, 6, and 5, with a mean of 10.1. Estimated mid latitude A indices were 4, 7, 16, 13, 7, 5, and 5, with a mean of 8.1. ‰ End of 18 WPM transition file ‰