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Solar tsunami used to measure Sun’s magnetic field

By Guest PostJuly 20, 2013Scienceatmosphere, cmes, coronal mass ejections, david long, earth, eis, explosion, extreme, japanese hinode spacecraft, magnetic field, measure, NASA, satellite, sdo, solar activity, solar dynamics observatory, solar storms, solar tsunami, sun, technological infrastructure, ultraviolet, ultraviolet imaging spectrometer, xray

A solar tsunami observed by NASA’s Solar Dynamics Observatory (SDO) and the Japanese Hinode spacecraft has been used to provide the first accurate estimates of the Sun’s magnetic field.

Solar tsunamis are produced by enormous explosions in the Sun’s atmosphere called coronal mass ejections (CMEs). As the CME travels out into space, the tsunami travels across the Sun at speeds of up to 1000 kilometres per second.

Similar to tsunamis on Earth, the shape of solar tsunamis is changed by the environment through which they move. Just as sound travels faster in water than in air, solar tsunamis have a higher speed in regions of stronger magnetic field. This unique feature allowed the team, led by researchers from UCL’s Mullard Space Science Laboratory, to measure the Sun’s magnetic field. The results are outlined in a paper soon to be published in the journal Solar Physics. (more…)

Solar Storm Protection

By Guest PostJuly 17, 2012Scienceastronaut, chest xray, chungnam national university, hanyang university, john bieber, john clem, massive explosion, megaelectron volts, mev, neutron monitors, paul evenson, polar region, protection, r pyle, sdo, solar dynamics observatory, solar storm, south korea, south pole, Space, su yeon oh, sun, university of delaware, warning system, yu yi

Warning system to protect astronauts from solar storms

Massive explosions on the sun unleash radiation that could kill astronauts in space.

Now, researchers from the U.S. and South Korea have developed a warning system capable of forecasting the radiation from these violent solar storms nearly three hours (166 minutes) in advance, giving astronauts, as well as air crews flying over Earth’s polar regions, time to take protective action.

Physicists from the University of Delaware and from Chungnam National University and Hanyang University developed the system and report on it in Space Weather: The International Journal of Research and Applications, published by the American Geophysical Union. The research article also is selected as an “Editor’s Highlight.” (more…)

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Solar tsunami used to measure Sun’s magnetic field

Solar Storm Protection