On Fri, May 10, 2024 at 05:18:34PM +0200,
Stephane Bortzmeyer <bortzme...@nic.fr> wrote
a message of 15 lines which said:
> La précédente alerte de ce type était en 2005.
>
> https://www.swpc.noaa.gov/news/media-advisory-noaa-forecasts-severe-solar-storm-media-availability-scheduled-friday-may-10
Jamais vu autant de messages d'alerte Presto en une journée, en tout
cas.
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--- Begin Message ---
:Issued: 2024 May 10 1829 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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A shock was detected in the solar wind data around 16:42 UTC on May 10. The
interplanetary magnetic field jumped from 4 nT to 44 nT, the solar wind speed
jumped from 460 km/s to 700 km/s and the solar wind density at the shock
increased from 5/cm3 to 30/cm3. The shock is related to an ICME arrival
associated with one of the coronal mass ejections that was detected on May
08-09. Geomagnetic conditions have reached severe storm levels globally (NOAA
Kp 8-) and major storm levels locally (K_Bel 7) starting at 15:00 UT on May 10.
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