Flare di classe M6 - il CME arriverà sul nostro pianeta tra il 2 e il 3 Novembre. spaceweather/images2013/01nov13/m6_strip.jpg M6-CLASS FLARE: Sunspot AR1884 is directly facing Earth, and it has a mixed-polarity magnetic field that harbors energy for strong eruptions. On Nov. 1st at 1953 UT the active region unleashed a brief but intense M6-class solar flare. NASAs Solar Dynamics Observatory recorded the extreme ultraviolet flash. Although the flare was aimed directly at Earth, its effect on our planet was minimal--mainly because the duration was so short (less than 1 minute). A brief blackout of HF radio signals might have occured on the daylit side of Earth, while low-frequency navigation signals could have been disrupted for ~tens of minutes. Any such disruptions have since subsided. Sunspot AR1884 poses a threat for longer and stronger flares this weekend. NOAA forecasters estimate a 40% chance of M-class flares and a 5% chance of X-class flares on Nov. 2nd and 3rd
Posted on: Sat, 02 Nov 2013 09:13:40 +0000