PRESTO ALERT

Fast warning for important solar events with implications for the space environment.
Source SIDC (RWC-Belgium)
Frequency ASAP, when needed
Format Plain text
Mail header PRESTO ALERT
SIDC code presto

Archive

Latest issue

:Issued: 2025 Jun 29 1954 UTC
:Product: documentation at http://www.sidc.be/products/presto
#--------------------------------------------------------------------#
# FAST WARNING 'PRESTO' MESSAGE  from the SIDC (RWC-Belgium)         #
#--------------------------------------------------------------------#
A partial halo coronal mass ejection (CME) was first observed in
SOHO/LASCO-C2 images around 21:00 UTC on Jun 28. It was associated with the
C4.0 flare (peaked at 19:54 UTC on June 28) produced by SIDC Sunspot Group
537 (NOAA Active Region 4126). With its source region (N06 W21) closer to
the central meridian, the corresponding ICME is expected to impact the
Earth on Jul 01-02.
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