Tomas wrote:

A coronal mass ejection (CME) associated with yesterday's X10-class flare
(peak at 2049Z 29-X-2003) impacted the Earth's magnetosphere today at about
1700Z 30-X-2003. Kp index reading show 7 and 8 at many reporting stations.
Bz is at the moment strongly negative. At least a G4-level geomagnetic
storm is in progress as well as a very strong proton event (PCA) and space
radiation storm. This space radiation storm has reached an S4 level on
29-X-2003, and is again on the rise. It is the second-most energetic event
during this current solar cycle, 23. Expect this storm to coninue,
especially with the prediction of further flare events.

The Aurora index is 10 (maximum), as I write this. This indicates a very
strong Aurora. Look for continued AU propagation (reports from yesterday
show VHF propagation via AU as high as 222 MHz) and visuals at high to some
middle latitudes. I expect a medium to high probability for visual aurora
in northern states of the US, tonight.
snipped

We had a very nice aurora in the northeast US tonight (Oct.-30) There
were large areas of intense red and many white rays reaching overhead.


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