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[DX] myrskya pitaa
Alvestadin sivulta:
"The unusually strong coronal stream in progress caused
severe to very severe geomagnetic storming during the 06-09h
UTC interval with the 3-hour planetary A index reaching 144
(as far as I can recall this is the highest 3-hour ap value associated
with a coronal stream disturbance, at least since the years prior
to the last sunspot minimum). Solar wind speed has levelled out
just below 700 km/sec. Active to major storming is likely for the
remainder of the day."
Ja komea kuva koronan rei'istä (ei puisella pelilaudalla vaan
taivaalla):
http://www.dxlc.com/solar/images/eit_284_20021120_1905_coron.jpg
The black areas on the solar disk are coronal holes.
Long distance medium wave (AM) band propagation along east-west
paths over high and upper middle latitudes is poor to very poor.
JLN
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