[HCDX] NW7US Aurora Alert and Geomagnetic Storm Alert - 20-XI-2003

[Tomas NW7US <nw7us@xxxxxxxxxxx>]

A severe geomagnetic storm (G4) is in progress due to the 
arrival of coronal hole mass ejections related to the 
returning sunspot group 484, now numbered 501.  Some 
reporting stations show a K index of 9.  The current 
planetary K index (Kp) is 8 and the Aurora index is 10.  
This is expected to possibly increase to a Kp of 9, 
a geomagnetic storm level G5, through the day.  HF 
conditions are poor.  MW conditions are poor.

Visual Aurora is possible today at low-latitudes.  
Aurora-mode propagation (Au and Au-Es) is possible and is 
already reported.  Visual Aurora is occurring now in night
regions, and is possible to occur tonight during darkness
in the Western Hemisphere (e.g., North America).

More information as events warrent will be posted in follow-up
bulletins.  Live information is on-going at
http://prop.hfradio.org/ and a discussion is at
http://hfradio.org/forums/

73 de Tomas, NW7US (AAR0JA/AAM0EWA)
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