:Issued: 2023 Aug 08 0757 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 X1.5 class flare was observed on August 07 peaking at 20:46 UTC. The flare was
produced by the NOAA Active Region (AR) 3386 (Catania sunspot group 01), which was
located at the west limb. Following this flare, the greater than 10 MeV proton flux
started to rise at 21:46 UTC and crossed the 10 MeV warning threshold at 01:10 UTC on
August 08 as measured by GOES. The 10 MeV proton flux remains currently above the
threshold.
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# Solar Influences Data analysis Center - RWC Belgium                #
# Royal Observatory of Belgium                                       #
#                                                                    #
# Website         http://www.sidc.be.                                #
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:Issued: 2023 Aug 08 0929 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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A full-halo coronal mass ejection (CME) was detected by the Cactus tool in
SOHO/LASCO-C2 coronagraph images on August 07 at 20:48. This is actually two
different coronal mass ejections. One is a narrow  (40-45 degrees) and very slow
(200-250 km/s) CME with a principal angle of about 10 degrees (North-North-Est). The
other CME is associate with the X1.5 class flare produced by the NOAA Active Region
(AR) 3386 (Catania sunspot group 01), which was located at the west limb. Due to the
source location, which was at the west limb, no Earth-directed component of this CME
is expected.
#--------------------------------------------------------------------#
# Solar Influences Data analysis Center - RWC Belgium                #
# Royal Observatory of Belgium                                       #
#                                                                    #
# Website         http://www.sidc.be.                                #
# E-mail          sidc-support@oma.be                                #
# To unsubscribe  http://www.sidc.be/registration/unsub.php          #
#                                                                    #
# Legal notices:                                                     #
# - Intellectual Property Rights:                                    #
#   http://www.astro.oma.be/common/internet/en/data-policy-en.pdf    #
# - Liability Disclaimer:                                            #
#   http://www.astro.oma.be/common/internet/en/disclaimer-en.pdf     #
# - Use and processing of your personal information:                 #
#   http://www.astro.oma.be/common/internet/en/privacy-policy-en.pdf #
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