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Prince
2002-Apr-19, 05:30 PM
http://www.agu.org/revgeophys/mccoma01/node3.html#SECTION00030000000000000000

John Kierein
2002-Apr-19, 06:00 PM
Aren't they talking about the interplanetary magnetic field, not the earth's? What's the IMF?

SeanF
2002-Apr-19, 06:07 PM
On 2002-04-19 14:00, John Kierein wrote:

What's the IMF?



Impossible Mission Force. /phpBB/images/smiles/icon_smile.gif

Seriously, according to the Introduction (http://www.agu.org/revgeophys/mccoma01/node1.html) on that same site, it is the Interplanetary Magnetic Field to which they're referring.

2002-May-08, 05:52 PM
On 2002-04-19 14:07, SeanF wrote:


On 2002-04-19 14:00, John Kierein wrote:

What's the IMF?



Impossible Mission Force. /phpBB/images/smiles/icon_smile.gif

Seriously, according to the Introduction (http://www.agu.org/revgeophys/mccoma01/node1.html) on that same site, it is the Interplanetary Magnetic Field to which they're referring.



9:50 A.M. HUb' push to page 1?

roidspop
2002-May-08, 06:29 PM
That's an interesting article, but the illustrations, which were essential to forming a clear idea of the systems being described, were not available. I didn't see any reference to the Earth's magnetic field being threatened, either; may have just skimmed past it.

Tim Thompson
2002-May-08, 11:42 PM
A case of mistaken identity. The IMF is the Interplanetary Magentic Field, the one that is dragged along by the solar wind. Furthermore, the "catastrophe" referred to is not a physical catastrophe, like smashing planets or something, but a mathematical "catastrophe" (i.e., it's a euphemism). In this case, the mathematical "catastrophe" is the putative failure to close the field lines, as it would seem that Maxwell's equations require.

The problem is that the CME drags the field along for the ride, and upsets efforts to determine the total field energy. It's an almost esoteric exercise in solar magnetic field physics, that has little, if anything, to do with Earth and its magnetic field.