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

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Latest issue

:Issued: 2016 Dec 31 1224 UTC
:Product: documentation at http://www.sidc.be/products/presto
#--------------------------------------------------------------------#
# FAST WARNING 'PRESTO' MESSAGE  from the SIDC (RWC-Belgium)         #
#--------------------------------------------------------------------#
From 9h UT on December 31 onwards, solar wind speed gradually increased
from about 300 km/s to about 370 km/s around 11:20 UT, when a shock in the
solar wind was observed by DSCOVR. Current solar wind speed is around 470
km/s. The magnitude of the Interplanetary Magnetic Field (IMF) rose from
around 3 nT to current values of about 14 nT. This is probably the effect
of the arrival of the Coronal Interaction Region in front of the expected
high speed stream associated with a positive coronal hole.

Active to minor storm geomagnetic levels (K Dourbes = 4-5) are expected on
December 31. On January 1 and 2, active levels are expected (K Dourbes =
4), with a chance for minor storm intervals (K Dourbes = 5).
#--------------------------------------------------------------------#
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