--- On Sat, 10/25/08, Craig Healy <[EMAIL PROTECTED]> wrote:
> A comment was made recently about how the solar numbers
> sometimes trailed
> reality. The number might be low, but conditions
> aren't very good. What
> does seem to be a slightly better indicator is the graphic
> of the Auroral
> Zone.
>
>
I agree, but those maps are rather hard to read sometimes.
The solar indices are gathered retroactively covering various periods. The K
index is more sensitive than the A index, and often rises first.
Because of the way the A is compiled, it takes a few 3-hour periods of activity
of the K before it shows up in the A.
The key items on the regular reports Craig has set up to post here however are
the two which describe current conditions, and the 3-hour K indices. The latter
are often indicative of upward or downward trends.
Russ Edmunds
Blue Bell, PA ( 360' ASL )
[15 mi NNW of Philadelphia]
40:08:45N; 75:16:04W, Grid FN20id
<[EMAIL PROTECTED]>
FM: Yamaha T-80 & Onkyo T-450RDS w/ APS9B @15'
AM: Modified Sony ICF 2010 barefoot
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