[HCDX] Re: X4.1 FLARE PEAK 0952 UTC 17-I-2005

["Jan Alvestad" <Jan.Alvestad@xxxxxxxxxxxxxxxx>]

Some corrections to messages posted by Tomas, NW7US (AAR0JA/AAA0WA)

 

This was a long duration X3.8 event originating in region 10720.
GOES-12, not GOES-10, is commonly used as the source for intensity
readings.

 

Two CMEs have been observed at ACE today, the first one arrived at 07:17
UTC. Its source was likely the full halo CME observed in association
with an M8 event in region 10720 on January 15. The second CME arrived
at about 10:42 UTC and has larger significance. The source is probably
the CME observed after the X2 event in region 10720 late on January 15.
As a result of the second CME solar wind speeds in excess of 800 km/sec
have been observed. Major to severe geomagnetic storming is possible for
the remainder of the day.

 

Jan Alvestad (author Solar Terrestrial Activity Report,
http://www.dxlc.com/solar/ )

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