Tad "...the setting Sun dropped from the zenith like a falling star" Cook, K7RA, this week reports:
If today is like yesterday and the day before that, it will be the 26th consecutive day with no sunspots. Think this is bad? At the last solar minimum, there were only four days showing any sunspots between September 5 and October 24, 2006.
For this week, geomagnetic conditions should be mild in the beginning and increasing later. Predicted planetary A index for July 18-24 is 8, 5, 5, 5, 10, 15 and 12. Geophysical Institute Prague predicts quiet conditions for July 18, quiet to unsettled July 19-20, quiet again on July 21 and unsettled July 22-24.
Sunspot numbers for July 10-16 were 0, 0, 0, 0, 0, 0 and 0 with a mean of 0. The 10.7 cm flux was 65.4, 65.7, 64.9, 65.2, 65.6, 65.7 and 64.6 with a mean of 65.3. Estimated planetary A indices were 4, 7, 21, 14, 10, 7 and 7 with a mean of 10. Estimated mid-latitude A indices were 2, 6, 16, 10, 9, 7 and 4 with a mean of 7.7.
For more information concerning radio propagation, visit the ARRL Technical Information Service Propagation page <http://www.arrl.org/tis/info/propagation.html>. To read this week's Solar Report in its entirety, check out the W1AW Propagation Bulletin page <http://www.arrl.org/w1aw/prop/>.
| Notes | This solar update is brought to you courtesy of the American Radio Relay League's ARRL Letter. |