A look at what causes the Aurora and why it was not as visible on Saturday
JACKSONVILLE, Fla. — It all came down to timing, Friday night a CME impacted the Earth just after sunset on the East Coast of the United States creating a historic solar storm at a level that was the highest since October 2003.
This particular event over performed as well pushing the northern lights south and became visible even into the tropics. Even after the sun came up in the United States and North America this event remained on going into the Eastern Hemisphere. Auroras were seen in Japan and Australia and then again in Europe.
Yet as the sun set over North America including the USA the planetary K Index used to measure this phenomena dropped right off to levels much to low for an Aurora to visible in the northern United States yet alone Florida. See how you can see what is causing the Auroras with your solar viewing glasses left over from the eclipse here.
A Geomagnetic Storm Watch remains in place Sunday as another CME is expected to arrive producing another significant round of Auroras globally. If this next round remains bright enough it could be visible again Sunday night before the storm starts to completely wane out. This all of course depends on many factors and has a high degree of uncertainty. Plus for many there may be to much cloud cover to get a good view of lights if they do develop.
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