Artikelrobot
Well-Known Member
The daily sunspot number reached a peak of 105 on April 6. To find a daily sunspot number this high, one must look back to last summer, when the sunspot number on August 2 was 112, over seven months ago
http://www.southgatearc.org/news/april2006/arrl_propagation_080406.htm
http://www.southgatearc.org/news/april2006/arrl_propagation_080406.htm