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'Extreme' class solar flare heading toward Earth, hopefully bringing nothing but auroras

Sarah Silbert — Fri, 13 Jul 2012 16:57:00 -0400

Yesterday, a solar flare set off from the sun, launching a coronal mass ejection (CME) heading toward Earth, and it's set to make an appearance in our fair skies this Saturday. While the wave of charged particles headed our way is much weaker than the most powerful solar flares (like the X28+ gust from 2003), it ranks in the extreme (X) class, and it's already caused a wave of UV radiation that interfered with radio signals, not to mention an uptake in solar protons swarming around Earth. According to SpaceWeather.com, the flare could cause some geomagnetic storms, which could endanger satellites and astronauts in space in addition to possibly interfering with communication signals. That (relatively minor) risk aside, those of you living up north could be in for a pretty sweet light show, so check the skies for the aurora borealis.

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Sun's coronal ejections caused by magnetic ropes, galactic weathermen to predict solar storms?

Michael Gorman — Sat, 18 Jun 2011 09:46:00 -0400

Space weather gets nasty when the sun starts shooting plasma into the cosmos, and these solar storms wreak havoc on both satellites and gadgets here on earth. Scientists want to predict the sun's eruptions so we can protect our gear (and know the best time to go tanning), and George Mason University researchers have made a discovery that may help us do so. By examining images from NASA's Solar Dynamic Observatory spacecraft, Professor Jie Zhang and grad student Xin Cheng determined that magnetic ropes are causing coronal ejections. The ropes are formed by several magnetic fields wrapped around each other, and scientists believe they can carry electrical currents strong enough to cause the plasma bursts. Prior to an eruption, Zhang observed a low-lying channel with unique electromagnetic properties (believed to be a magnetic rope) heat a portion of the sun's surface up to 10 million degrees. Once hot enough, the spot spewed forth copious amounts of the plasma and magnetic energy that gives GPS units and phones fits. Now that we know what gets Helios all riled up, we just need to find a way to calm him down. Close-ups of the sun in its tizzy are after the break.

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Violent sun throws fit, massive blast of plasma to hit Earth tomorrow

Tim Stevens — Tue, 03 Aug 2010 09:02:00 -0400

Coronal mass ejections (CMEs) are no laughing matter, but for quite some time now we've been livin' easy as the sun kept it cool. That changes tomorrow, when a massive CME will hit our atmosphere, flung asunder by that great CFL in the sky, which apparently spent much of yesterday throwing a giant, solar tantrum. Scientists are saying that human life will probably not be exterminated thanks to our atmosphere, but GPS and cellular reception could be a little finicky tomorrow. We can't wait to see the anti-sun attack ads from Apple.

Update: Twitter user d0mth0ma5 sent us this link to a NASA time-lapse of the ejection. Make your time.

[Thanks, Eric]

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