Solar Energy Responsible For Northern Lights

It's long been known that the sun was responsible for a whole range of phenomena on the green and blue orb known as Earth. Well, scientists have found still more proof of that, as they were able to physically trace solar output to the Northern Lights (aurora borealis).

New data from NASA's Themis mission, a quintet of satellites launched this winter, found the energy comes from a stream of charged particles from the sun flowing like a current through twisted bundles of magnetic fields connecting Earth's upper atmosphere to the sun.

The energy is then abruptly released in the form of a shimmering display of lights, said principal investigator Vassilis Angelopoulos of the University of California at Los Angeles.

Results were presented Tuesday at the American Geophysical Union meeting.

In March, the satellites detected a burst of Northern Lights over Alaska and Canada. During the two-hour light show, the satellites measured particle flow and magnetic fields from space.

To scientists' surprise, the geomagnetic storm powering the auroras raced 400 miles in a minute across the sky. Angelopoulos estimated the storm's power was equal to the energy released by a magnitude 5.5 earthquake.

"Nature was very kind to us," Angelopoulos said.

Still think the sun has nothing to do with global climate or the possible global warming?