The K7RA Solar Update

The sun has been blank, no visible sunspots, for the past seven days, September 7-13. We may not see another spot until September 22, just before the autumnal equinox. Thursday evening, September 13, Spaceweather.com mentioned a coronal wind hitting earth this evening, September 14. The Interplanetary Magnetic Field (IMF) points south, which makes the Earth vulnerable to solar wind, but other sources don’t call for an increase in geomagnetic activity today. We might assume that a solar wind from 27 to 28 days ago could return at this time, based on the rotation of the Sun relative to Earth. But looking back four weeks does not reveal any heightened activity. Of course, it could be that the IMF pointed north, protecting earth from the coronal wind.

http://www.arrl.org/news/stories/2007/09/14/102/?nc=1

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