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: 2019 May 14 0900 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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NOAA Kp is currently equal to 6 (moderate geomagnetic storm, between 3h and
6h UT on May 14), corresponding to Interplanetary Magnetic Field (IMF) Bz
values below -10 nT. The latest K Dourbes is also at moderate storm level
(K Dourbes = 6, between 5h and 8h UT) but Bz is meanwhile close to zero.
Solar wind speed as measured by DSCOVR has been rising since about 20h UT
on May 13, and is currently near 560 km/s. The magnitude of the IMF has
been elevated since then with a maximum around 15 nT and current values
around 7 nT. Solar wind temperature has dropped significantly since about
7h UT on May 14. Most probably these features are due to the arrival of the
May 11 CME. Active to moderate geomagnetic storm conditions (K Dourbes =
4-6) are possible on May 14 and 15.
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