[UK-CONTEST] GB5CC
Ian White GM3SEK
gm3sek at ifwtech.co.uk
Sun Mar 9 15:18:22 EDT 2008
Dave Sergeant wrote:
>
>When I checked around 0630 at the DK0WCY magnetometer
>(http://www.dk0wcy.de/magneto/magnet.htm) I found the K index was 5
>from 0300-0600z. It dropped to 3 during the day but I see it has just
>shot up to 5 again.
>
Those would be the "local" K indices, based on measurements at DK0WCY's
own site.
Another online magnetometer is at GM4PMK's QTH on the Isle of Mull,
www.marsport.org.uk/observatory That one showed the same wobble
yesterday evening, followed by a larger one in the small hours lasting
through dawn (still on today's screen). Once again, the K indices are
its own locally computed values, so they are different from those at
DK0WCY.
Global K indices combine data from several sites around the world, so
those will be different yet again.
--
73 from Ian GM3SEK
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