Monday, September 11, 2017

CME from X8.9 flare arrives soon.

FAST WARNING 'PRESTO' MESSAGE  from the SIDC (RWC-Belgium) 2017 Sep 11

The X8.9 flare (peaked at 16:06 UT, on September 10) which originated from
the Catania sunspot group 46 (NOAA active region 2673) was associated with
the full halo CME. The projected speed of the CME was about 2900 km/s. The
arrival of the glancing blow from the CME-driven shock wave is expected
today at about 12:00 UT.
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