Tad "A sunny pleasure-dome with caves of ice" Cook, K7RA, this week reports:
We had seven days of no sunspots this week, but a sunspot was emerging on Thursday, June 5. Helioseismic holography revealed a high latitude sunspot on the opposite side of the Sun. Until recently, we had no idea what was happening on the far side of the Sun, the side directed away from Earth.
The NOAA Space Weather Prediction Center sees a constant and quiet geomagnetic planetary A index of 5 through June 14. Geophysical Institute Prague predicts quiet conditions for June 6, quiet to unsettled June 7-8 and quiet again June 9-12.
Sunspot numbers for May 29-June 4 were 0, 0, 0, 0, 0, 0 and 0 with a mean of 0. The 10.7 cm flux was 68.1, 67.1, 66.9, 66.6, 67.1, 66.3 and 65.2 with a mean of 66.8. Estimated planetary A indices were 9, 11, 8, 8, 5, 4 and 4 with a mean of 7. Estimated mid-latitude A indices were 7, 7, 8, 6, 4, 3 and 2, with a mean of 5.3.
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. |