" SOLAR SECTOR BOUNDARY CROSSING: On October 29th or 30th, Earth will cross a fold in the heliospheric current sheet--a vast wavy structure in interplanetary space separating regions of opposite magnetic polarity. This is called a "solar sector boundary crossing," and it could trigger geomagnetic activity around Earth's poles.
https://services.swpc.noaa.gov/text/d...
NOAA forecasters estimate a 40% chance of G1-class geomagnetic storms when the crossing occurs. An additional enhancement in Bt and solar wind speed is expected on 30 Oct due to influence of a negative polarity coronal hole high speed stream.
TWO HOLES IN THE SUN'S ATMOSPHERE: NASA's Solar Dynamics Observatory has detected two holes in the sun's atmosphere. One has turned to face Earth, and the other is not far behind.
http://spaceweather.com/
"Coronal holes" are places where the sun's magnetic field has opened up, allowing solar wind to escape. They look dark because the glowing-hot plasma normally contained there is gone.
Solar wind flowing from these holes should reach Earth in succession on Oct. 31-Nov. 1 and Nov. 3-4, possibly bringing minor geomagnetic storms. This means Halloween around the Arctic Circle could be illuminated by ghostly-green skies.
Arctic skywatchers sould be alert for auroral displays.
What is a Solar Sector Boundary Crossing?
http://www.solarham.net/plane.htm
http://www.solarham.net/ "
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