Two NASA missions decode intense solar flares

Washington, April 20 (IANS) Three solar observatories have captured the most comprehensive observations of an electromagnetic phenomenon called a “current sheet”, strengthening the evidence that the understanding of solar flares is correct.

A “current sheet” is a very fast and flat flow of electrically-charged material, defined in part by its extreme thinness compared to its length and width.

“Current sheets” form when two oppositely-aligned magnetic fields come in close contact, creating very high magnetic pressure.

The multi-faceted view of the December 2013 flare was made possible by three solar-watching missions: NASA’s Solar Dynamics Observatory (SDO), NASA’s Solar and Terrestrial Relations Observatory (STEREO) and Hinode, a collaboration between the space agencies of Japan, the US, Britain and Europe.

Solar flares are intense bursts of light from the sun. They are created when complicated magnetic fields suddenly and explosively rearrange themselves, converting magnetic energy into light.

“The existence of a ‘current sheet’ is crucial in all our models of solar flares,” said James McAteer, astrophysicist at New Mexico State University.

“These observations make us much more comfortable that our models are good,” he added.

The strongest solar flares can impact the Earth’s atmosphere and interfere with our communications systems and also disrupt onboard satellite electronics.

Unlike other space weather events, solar flares travel at the speed of light, meaning we get no warning that they are coming.

Better models lead to better forecasting, said Michael Kirk, space scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.

“These complementary observations allowed unprecedented measurements of magnetic reconnection in three dimensions. This will help refine how we model and predict the evolution of solar flares,” Kirk added.

Because “current sheets” are so closely associated with magnetic reconnection, observing a “current sheet” in such detail backs up the idea that magnetic reconnection is the force behind solar flares.

“You have to be watching at the right time, at the right angle, with the right instruments to see a current sheet,” said McAteer in the study published in the Astrophysical Journal Letters.

The new study is unique in that several measurements of the current sheet — such as speed, temperature, density and size — were observed from more than one angle or derived from more than method.

Leave a Reply

Please enter your comment!

The opinions, views, and thoughts expressed by the readers and those providing comments are theirs alone and do not reflect the opinions of or any employee thereof. is not responsible for the accuracy of any of the information supplied by the readers. Responsibility for the content of comments belongs to the commenter alone.  

We request the readers to refrain from posting defamatory, inflammatory comments and not indulge in personal attacks. However, it is obligatory on the part of to provide the IP address and other details of senders of such comments to the concerned authorities upon their request.

Hence we request all our readers to help us to delete comments that do not follow these guidelines by informing us at Lets work together to keep the comments clean and worthful, thereby make a difference in the community.

Please enter your name here