Aurora Links


Aurora Watching Links - For finding Aurora I look at three things.  POES Auroral Activity level of 7 or higher, with 8+ being prefered, and the sun being on the other side of the earth (look at the red arrow).  This brings the Aurora oval down to where it overlaps middle Minnesota well.  Second I look for a ACE MAG & SWEPAM with the Bz (red line) below zero, the greater the magnatude the better.  -5 is good, -10 is great, 15+ is excelent.  The third thing I look at is solar wind speed to be greater than 400km sec (yellow line), also on the ACE MAG & SWEPAM plots page. There are a couple of problems with this.  The POES plots tend to trail reality by an hour or two so what they indicate has generally passed.  This is where guess work come into play.  I look at the  NOAA Space Weather site for their posterd predictions of CMEs hitting earth.  I look at the movies from SOHO Solar and Heliospheric Observatory to see if there are any CMEs headed out way.  They usually take a couple of days to arive.  Look at the blue corona mpegs.  I also check out posting at the Auroral Observation Network to see if other are seeing Aurora.  Especially if they are east of Minnesota.  The Short Wave Radio Map from the Solar Terrestrial Dispatch provides a good idea of where the auroral oval will hamper radio communications and tell where the Auroral displaies have a chance of showing up.  I haven't used their storm alerts yet as they charge for email subscription.  Much of their data is republished government data available from other sites. Astronomy
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