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: 2019 Sep 01 1720 UTC
:Product: documentation at http://www.sidc.be/products/presto
#--------------------------------------------------------------------#
# FAST WARNING 'PRESTO' MESSAGE  from the SIDC (RWC-Belgium)         #
#--------------------------------------------------------------------#
Geomagnetic conditions have reached moderate storm levels. NOAA Kp is
currently equal to 6 (moderate geomagnetic storm, between 12h and 15h UT on
Sep 01). The latest K Dourbes measurements are at active levels (K Dourbes
= 5). The enhanced geomagnetic conditions are due to a High Speed Stream
(HSS) from a recurrent positive polarity coronal hole that passed the
central solar meridian a couple of days ago.  

The solar wind speed has ranged between 600 and 700 km/s (as recorded ACE).
The total magnetic field strength has varied between 5 and 8 nT over the
past few hours. Bz has been fluctuating around 0 nT between -8 and +8 nT.
Enhanced solar wind speeds are anticipated over the next day until the HSS
has passed, and as a consequence further periods of elevated geomagnetic
activity are expected.
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