How we almost had a worldwide catastrophe in 2012, and probably still will

JLova

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It hit Quebec in 1989. I lived there then and didn’t know about this shift so this would have been twice as large. I don’t think it would have been that big. Bad yes, but not as bad as the article is saying. Just going by the fact that I didn’t even experience this shyt when it happened then.
 

acri1

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It hit Quebec in 1989. I lived there then and didn’t know about this shift so this would have been twice as large. I don’t think it would have been that big. Bad yes, but not as bad as the article is saying. Just going by the fact that I didn’t even experience this shyt when it happened then.

Nah, it would've been bad. The one that almost hit in 2012 was much bigger than the one that hit in 1989.

In his study, Riley looked carefully at a parameter called Dst, short for "disturbance – storm time." This is a number calculated from magnetometer readings around the equator. Essentially, it measures how hard Earth's magnetic field shakes when a CME hits. The more negative Dst becomes, the worse the storm. Ordinary geomagnetic storms, which produce Northern Lights around the Arctic Circle, but otherwise do no harm, register Dst=-50 nT (nanoTesla). The worst geomagnetic storm of the Space Age, which knocked out power across Quebec in March 1989, registered Dst=-600 nT. Modern estimates of Dst for the Carrington Event itself range from -800 nT to a staggering -1750 nT.

In their Dec. 2013 paper, Baker et al. estimated Dst for the July 2012 storm. "If that CME had hit Earth, the resulting geomagnetic storm would have registered a Dst of -1200, comparable to the Carrington Event and twice as bad as the March 1989 Quebec blackout."

Near Miss: The Solar Superstorm of July 2012 | Science Mission Directorate[/QUOTE]
 
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