Solarna oluja 26 septembra 2011

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http://www.freerepublic.com/focus/f-news/2784031/posts

GEOMAGNETIC STORM: A strong-to-severe geomagnetic storm is in progress (Kp-8) Severe.
  Spaceweather ^ | Sept 26th, 2011
Posted on 26. septembar 2011 23:49:04 by TaraP
GEOMAGNETIC STORM: A strong-to-severe geomagnetic storm is in progress following the impact of a coronal mass ejection (CME) at approximately 12:15 UT on Sept. 26th. The Goddard Space Weather Lab reports a "strong compression of Earth's magnetosphere. Simulations indicate that solar wind plasma [has penetrated] close to geosynchronous orbit starting at 13:00UT."
Geosynchronous satellites could therefore be directly exposed to solar wind plasma and magnetic fields. High-latitude sky watchers should be alert for Northern and Southern Lights after nightfall. Aurora alerts: text, voice.
aurora photos: from Minoru Yoneto of Queenstown, New Zealand; from Ole Ambrosiussen of Hvinningdal, Silkeborg, Denmark; from Steven Graham of Christchurch, New Zealand; from Mika Puurula of Sotkamo, Finland; from Jonathan Tucker of Whitehorse, Yukon; from Julius Jahre Sætre of Vestfold, Norway
STRONG SOLAR ACTIVITY: Having already unleashed two X-flares since Sept. 22nd, sunspot AR1302 appears ready for more. The active region has a complex "beta-gamma-delta" magnetic field that harbors energy for strong M- and X-class eruptions. Flares from AR1302 will become increasingly geoeffective as the sunspot turns toward Earth in the days ahead.

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G 4
Severe...Kp = 8, including a 9-

Power systems: possible widespread voltage control problems and some protective systems will mistakenly trip out key assets from the grid.

Spacecraft operations: may experience surface charging and tracking problems, corrections may be needed for orientation problems.

Other systems: induced pipeline currents affect preventive measures, HF radio propagation sporadic, satellite navigation degraded for hours, low-frequency radio navigation disrupted, and aurora has been seen as low as Alabama and northern California (typically 45° geomagnetic lat.)**.

[zakk]

DRAMA!