CME Scoreboard

Prediction for CME (2013-04-11T07:36:00-CME-001)

:Issued: 2013 Apr 11 1130 UTC
:Product: documentation at http://www.sidc.be/products/presto
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# FAST WARNING 'PRESTO' MESSAGE from the SIDC (RWC-Belgium) #
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The M6.5 flare of today was accompanied by a full halo CME first
detected in the SOHO/LASCO C2 field of view at 07:24 UT. The CME
plane-of-the-sky linear speed was around 930 km/s (the second-order fit
showed deceleration from around 1160 km/s to 800 km/s as the CME
progressed through the C2 and C3 fields of view). The corresponding
interplanetary disturbance is expected to arrive at the Earth in the
morning of April 13. Due to the position of the CME source region
(Catania sunspot group 43, NOAA AR 1719) close to the solar disk center
(around N09E12), the arrival of the magnetic cloud is possible, even if
the CME presented a strong asymmetry of the material distribution
towards the east. If present, the magnetic cloud will most probably have
left-handed chirality, with WSE or NWS magnetic field orientations. The
occurrence of a strong geomagnetic storm (K index around 7) will be
probable. The proton flux at energies above 10 MeV crossed the SEP event
threshold around 10:00 UT and is still rising at the time of writing.
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:Issued: 2013 Apr 11 0858 UTC
:Product: documentation at http://www.sidc.be/products/presto
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# FAST WARNING 'PRESTO' MESSAGE from the SIDC (RWC-Belgium) #
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An M6.5 flare peaking at 07:16 UT was detected today in the Catania
sunspot group 43 (NOAA AR 1719), accompanied by a metric type II burst
observed by Humain starting from around 07:02 UT. SDO/AIA data
demonstrate that this flare was also accompanied by coronal dimmings, an
EIT wave, and a post-eruption arcade, indicating the eruption of a CME.
SOHO/LASCO data is still incomplete, but the presence of at least a
partial halo CME first observed in the LASCO C2 field of view at 07:36
UT is confirmed. Due to the CME source region position close to the
central meridian (around N07E13), the arrival of the corresponding ICME
at the Earth is probable. More information on the possible arrival time
and geoeffectiveness of this CME will be sent around later as more data
on this event will be available.
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