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Sunspot 486 Produces Intense Earth Bound Solar Flare
Boulder - Oct 29, 2003 The dynamic solar regions reported on 21 October continue to produce high levels of solar activity. NOAA Region 486 produced a category R4 (severe) radio blackout with an associated category S3 (strong) solar radiation storm on 28 October at 1110 UTC (6:10 A.M. EST). The SOHO/LASCO instruments also observed a full halo coronal mass ejection with this activity, which is Earth directed. This region is the second largest in size this solar cycle As a result of this activity a category G4 (severe) geomagnetic storm is expected with periods of category G5 (extreme) levels possible. The solar radiation storm is also expected to continue at strong (G3) levels for the next 48 hours. Further major eruptions are possible from these active regions as they rotate across the face of the sun over the next few days. Agencies impacted by solar flare radio blackouts, geomagnetic storms, and solar radiation storms may experience disruptions through this period. These include spacecraft operations, electric power systems, HF communications, and navigation systems. Community Email This Article Comment On This Article Related Links Top Flares at SpaceWeather.com NOAA Space Environment Center SOHO Spaceweather Live Cluster Data SpaceDaily Search SpaceDaily Subscribe To SpaceDaily Express Solar Science News at SpaceDaily
From 'Macro' To 'Micro' � Turbulence Seen By Cluster
Paris (ESA) Aug 11, 2005Thanks to measurements by ESA's Cluster mission, a team of European scientists have identified 'micro'-vortices in Earth's magnetosphere. |
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