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The years ahead could be especially lively. Raeder explains: "We're entering Solar Cycle 24. For reasons not fully understood, CMEs in even-numbered solar cycles (like 24) tend to hit Earth with a leading edge that is magnetized north. [bold]Such a CME should open a breach and load the magnetosphere with plasma just before the storm gets underway. It's the perfect sequence for a really big event.[/bold]"
Originally posted by Phage
The magnetosphere is not the only protection from the solar wind. Venus has no planetary magnetosphere and has a dense atmosphere. In lieu of a planetary magnetic field, an induced magnetic field forms, produced by interactions between the solar wind and the ionosphere. It would take a very long time with no planetary magnetosphere for our atmosphere to be stripped away if it happened at all.
Planets with a weak or non-existent magnetosphere are subject to atmospheric stripping by the solar wind.
Venus, the nearest planet to Earth, has an atmosphere 100 times denser than our own. Modern space probes have discovered a comet-like tail that stretches back to the orbit of the Earth.[28]
Mars is larger than Mercury and four times farther from the sun, and yet even here it is thought that the solar wind has stripped away up to a third of its original atmosphere, leaving a layer 100 times less dense than the Earth's. It is believed the mechanism for this atmospheric stripping is gas being caught in bubbles of magnetic field, which are ripped off by solar winds.
I'm talking about both UV radiation and high energy particles (both cosmic rays and the high energy particles from the sun). The magnetosphere does intercept some of these but even if it didn't, the atmosphere still would. The atmosphere can deal with high energy particles better than the magnetosphere can. Of course, in case of a gamma ray burst or some other truly awesome event, neither our magnetosphere nor our atmosphere would help. But for the ordinary, everyday stuff, the atmosphere works fine.
Originally posted by squiz
I agree that the atmosphere does serve some protection, but it kind of sounds like your saying that our atmosphere would be fine without the magnetosphere. As I said before no magnetosphere no atmosphere, (eventually).
I'd also like to mention that this discovery changes conventional views of the interactions with magnetospheres and the solar wind. Even my comment regarding the polarity of the IMF seems to be no longer valid. So all bets are off.
Originally posted by Chadwickus
Could this be related to the sun being at solar minimum?
Is it a coincidence that the breach has occurred at the same time as the solar minimum?
If it is related, then the magnetic field will increase as the sun's activity increases.
Or I'm completely wrong
Originally posted by Phage
kook
Originally posted by zorgon
Originally posted by soma_pills
On the Yahoo front page right now link
only posted by AP 2 hrs 27 mins ago
Hehe ATS beats AP out the door
Originally posted by Phage
I would never call you a kook, Zorgon.
I was referring to the kook who wrote the "article".
Dec. 15, 2008: Solar flares are the most powerful explosions in the solar system. Packing a punch equal to a hundred million hydrogen bombs, they obliterate everything in their immediate vicinity. Not a single atom should remain intact.
At least that's how it's supposed to work.
"We've detected a stream of perfectly intact hydrogen atoms shooting out of an X-class solar flare," says Richard Mewaldt of Caltech. "What a surprise! These atoms could be telling us something new about what happens inside flares."
The event occurred on Dec. 5, 2006. A large sunspot rounded the sun's eastern limb and with little warning it exploded. On the "Richter scale" of flares, which ranks X1 as a big event, the blast registered X9, making it one of the strongest flares of the past 30 years.
NASA managers braced themselves. Such a ferocious blast usually produces a blizzard of high-energy particles dangerous to both satellites and astronauts. Indeed, moments after the explosion, radio emissions from a shock wave in the sun's atmosphere signaled that a swarm of particles was on its way.
An hour later they arrived. But they were not the particles researchers expected.