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Originariamente inviato da frankytop
Ma che accidenti vuol dire nanotesla negativi....  ma perchè quelli positivi fanno forse ribrezzo? |
non so, ma immagino che dove l'ho letto avessero fatto casino con gli esponenti negativi, boh... 
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To get an idea of the strength of the 1859 storm, you have to wade into nT's for a moment.
A space storm's impact is measured in nano-Teslas (nT), Brekke explained. The lower the figure, the more powerful the storm. A moderate storm can be around -100 nT; extreme and damaging storms have been logged at around -300 nT.
The 1989 coronal mass ejection that knocked out power to all of Quebec, Canada measured -589 nT, Brekke said. The 1859 perfect storm was estimated to have been -1,760 nT. Brekke used three exclamation points in his e-mail delivering that number.
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http://www.space.com/scienceastronom...ay_031027.html
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-- Jumpjack --
Ultima modifica di jumpjack : 03-09-2010 alle 20:23.
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