:Issued: 2023 Aug 01 1339 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 partial halo Coronal Mass Ejection (CME) has been seen in SOHO/LASCO-C2 images,
launched today around 00:12 UTC. This partial halo CME consisted of three different
CMEs. The first CME was observed with its main component in the NE direction and is
believed to be a back-sided event. The second CME observed at SE of the solar disk is
a partial halo with an angular width of about 120 degrees and a projected speed of
about 300 km/s (as detected and measured by the Cactus tool). This CME is associated
with the filament eruption near the central meridian. The third CME is related the
NOAA AR 3392 activity which is more towards the east and away from the Earth. Due to
the low speed and the non-Earth directed CME components, no impact on the geomagnetic
activity is expected.
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