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: 2016 Jul 25 0625 UTC
:Product: documentation at http://www.sidc.be/products/presto
#--------------------------------------------------------------------#
# FAST WARNING 'PRESTO' MESSAGE  from the SIDC (RWC-Belgium)         #
#--------------------------------------------------------------------#
A shock-like feature was observed in the solar wind parameters on 23 July
around 14:50UT. Solar wind speed increase abruptly from around 390 km/s to
460 km/s, with Bt from +5 nT to +13 nT. Bz was near -9 nT around 15:40UT
and 16:40UT, and near -11 nT around 20:05UT. 

Minor storming levels were reached by Kp during the 18-21UT interval, and
remained active afterwards. K Dourbes was mostly at active levels since the
15-18UT interval. Further active episodes remain possible.

The source of the disturbance is most likely the very late arrival of the
CME(s) associated to flaring activity in NOAA 2565/2567 late on 20 July.
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