:Issued: 2023 Aug 10 0916 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 halo coronal mass ejection (CME) was observed on August 09 at 16:12 UTC in
SOHO/LASCO-C2. The SIDC Cactus Tool estimated an angular width of 350 degrees and
median speed of 651 km/s on the coronagraph LASCO-C2 images. No source location is
visible on the solar disc seen from Earth. It is believed to come from one of the
very productive regions such as NOAA Active Region (AR) 3386 (Catania sunspot group
01)  which is currently on the far side view. Therefore, due to the source location,
no Earth-directed component of this CME is expected.
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