Post by scpg02 on Dec 1, 2014 16:00:57 GMT
Giant sunspot may cause massive solar storms
Calla Cofield for Space.com
mashable.com/2014/11/30/sunspot-solar-storms/
Calla Cofield for Space.com
The largest sunspot to appear on Earth's nearest star in more than two decades is once again pointed at the planet, and it will likely kick-start solar storms, NASA scientists say.
The massive sunspot, previously known as Active Region 12192, was turned toward Earth in October and early November, but rotated out of view. While it was on the Earth-facing side of the sun, the sunspot did not produce any coronal mass ejections — hot bursts of material ejected into space at 4 million mph (6.4 million kilometers/hour) — which have the potential to damage satellites and power grids. Now the active region has rotated back around to face Earth again, and although the sunspot has shrunk in size, it will likely be disruptive, NASA scientist Holly Gilbert told Space.com during a video interview about the massive sunspot.
"This time around, it's more likely to have some coronal mass ejections associated with it, even though the solar flares might be smaller," said Gilbert, chief of the Solar Physics Laboratory at NASA's Goddard Space Flight Center in Maryland. "We have a good idea, based on the structure of that magnetic field and the sunspot, that it's very possible that it will create some midlevel flares."
~snip~
The massive sunspot, previously known as Active Region 12192, was turned toward Earth in October and early November, but rotated out of view. While it was on the Earth-facing side of the sun, the sunspot did not produce any coronal mass ejections — hot bursts of material ejected into space at 4 million mph (6.4 million kilometers/hour) — which have the potential to damage satellites and power grids. Now the active region has rotated back around to face Earth again, and although the sunspot has shrunk in size, it will likely be disruptive, NASA scientist Holly Gilbert told Space.com during a video interview about the massive sunspot.
"This time around, it's more likely to have some coronal mass ejections associated with it, even though the solar flares might be smaller," said Gilbert, chief of the Solar Physics Laboratory at NASA's Goddard Space Flight Center in Maryland. "We have a good idea, based on the structure of that magnetic field and the sunspot, that it's very possible that it will create some midlevel flares."
~snip~
mashable.com/2014/11/30/sunspot-solar-storms/
