FYI, an extract from this weeks ARRL Propagation Bulletin...
(and nice to see Australia's own IPS getting a good plug to a WW ham audience)
Average daily sunspot numbers and solar flux for the week were both higher - sunspot numbers up over
three points to 93.1 - and solar flux up by eight points to 117.2.
Geomagnetic activity was a bit lower, with April 20 the most active day after a coronal hole on the
Sun spewed a solar wind at high speed. The Australian government gave an alert one day prior.
You can subscribe to those emailed warnings at http://www.ips.gov.au/mailman/listinfo/ips-geo-warning.
If you are in Australia, the same service offers an HF radio propagation course.
See http://www.ips.gov.au/Products_and_Services/2/2 for details.
The IPS has predicted monthly smoothed sunspot numbers and solar flux at http://www.ips.gov.au/Solar/1/6 and it
looks like they predict the peak of Cycle 24 exactly two years from now in April 2013.
IPS: Cycle 24 peak now April 2013
IPS: Cycle 24 peak now April 2013
Adam, Brisbane
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Re: IPS: Cycle 24 peak now April 2013
Well Adam, It Is to be hoped they are correct as the proximity (just after the equinox) can be very exciting---Propo' Xmas to early May if Ol' sol does us the favour, 73 John. VK4ZJB