Subj : Space Weather
To   : All
From : Roger Nelson
Date : Sun Aug 31 2014 14:55:13

Space Weather News for Aug. 31, 2014
http://spaceweather.com
 
Aurora season is now fully underway around the Arctic circle.  With the end of 
northern summer approaching, dancing green lights are beaming through the 
deepening polar twilight on a regular basis. Unlike lower latitudes, the Arctic 
does not require a full-fledged geomagnetic storm for aurora sightings.  Check 
the latest images on the front page of http://spaceweather.com
 
Meanwhile, another polar phenomenon is on the wane: noctilucent clouds (NLCs).  
Data from NASA's AIM spacecraft suggest that the northern summer season for 
NLCs ended on or about August 26th.  The "noctilucent daisy" shown on 
http://spaceweather.com will probably remain blank until November, when NLC 
activity shifts to the southern hemisphere.  NLCs are a summertime phenomenon 
and they switch back and forth between the hemispheres accordingly.  Stay tuned 
for more electric blue ... in a few months.
 
 
Regards,
 
Roger

--- D'Bridge 3.99
 * Origin: NCS BBS - Houma, LoUiSiAna (1:3828/7)

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