Largest Solar Radiation Storm since October 2003


Correction and New Data from NOOA:

Earlier, it was stated that the current Solar Radiation Storm was the largest since May 2005, when the 10 MeV protons exceeded over 3000 PFU. This was not correct.
At the time of the earlier post, this current Storm was the biggest since January 2005, when the 10 MeV flux was 5040 pfu. After the arrival of the CME earlier today, the 10 MeV flux again increased and we were at around 6300 pfu. This is now the largest Solar Radiation Storm since October 2003. (The Halloween Storms)

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RWC BELGIUM Tue Jan 24 2012, 1459 UT

SHOCK IN SOLAR WIND There is a hint that the shock linked to the halo CME of Jan. 23 has just arrived (14:30 UT) in the Earth vicinity. The ACE spacecraft magnetic field measurements show a sharp excursion (up to 40 nT) for Bt. The Bz component is still positive. The shock is currently not seen in the density, speed and temperature measurements: we suspect that these measurements are currently corrupted by the proton event still in progress. We expect in the coming hours minor storm conditions to prevail.
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