[HCDX] NW7US Propagation Alert - 1634 UTC 23 AUG 2005

["Tomas, NW7US" <nw7us@xxxxxxxxxxx>]

Aurora chasers, radio DXers, take note:  Even during this time of lower  
solar activity, with the cycle so close to its end (expected to be during  
2007), there are still moments of "flare-ups" significant enough to cause  
some space weather and geomagnetic activity.

A greater than 10MeV proton event is currently in progress, following an  
M5.6 X-ray flare from NOAA active region 0798 which began at 1646 UTC and  
peaked at 1727 UTC yesterday, August 22, 2005. A halo coronal mass  
ejection (CME) was observed in association with the proton flare.  (A halo  
CME is one that is directed toward Earth).

This proton event augments an on-going proton event that was triggered  
yesterday evening just after 1800 UTC.  This first proton event is  
probably related to the Long Duration Event M5.6 flare of yesterday  
evening and the accompanying halo CME.

On August 23 and 24, due to the arrival of the coronal mass ejections from  
the flares noted above, aurora is possible in High Latitudes, down through  
the lower Canadian regions.  Some Aurora might be visible in Maine and  
other areas of similar latitude.

Some degradation on HF and MW is occurring and expected to continue.   
Especially on propagation paths that traverse over the poles.

More updates, when warranted.

73 de Tomas, NW7US (AAR0JA/AAA0WA)

: Propagation Editor for CQ, CQ VHF, Popular Communications :
: Creator; live propagation center http://prop.hfradio.org/ :
: Associate Member of Propagation Studies Committee of RSGB :
: US Army Miltary Affiliate Radio Service (MARS) SMD AAA0WA :
: 122.93W 47.67N / Brinnon, Washington USA CN87 CW/SSB/DIGI :
: Website/software/database design http://newwebmakers.com/ :
: 10x56526, FISTS 7055, FISTS NW 57, Lighthouse Society 144 :
-- 
73 de Tomas, NW7US (AAR0JA/AAA0WA)

: Propagation Editor for CQ, CQ VHF, Popular Communications :
: Creator; live propagation center http://prop.hfradio.org/ :
: Associate Member of Propagation Studies Committee of RSGB :
: US Army Miltary Affiliate Radio Service (MARS) SMD AAA0WA :
: 122.93W 47.67N / Brinnon, Washington USA CN87 CW/SSB/DIGI :
: Website/software/database design http://newwebmakers.com/ :
: 10x56526, FISTS 7055, FISTS NW 57, Lighthouse Society 144 :
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