Helioseismology Reveals New Details About The Sun
° Abstract of research paper, Science (reg. req’d)
The sun’s magnetic field undergoes substantial changes during the course of its 22 year cycle. These changes are thought to be the result of activity in the tachocline, a thin layer 130,000 miles within the sun. According to research published in Science, Researchers have now found periodic 1.3- and 1.0-year oscillations at the tachocline. This cannot be explained with current knowledge of the sun, but does go to show that the sun is even more active than had been previosuly known. The data upon which these discoveries were made came from Solar and Heliospheric Observatory (SOHO) and the Global Oscillation Network Group (GONG).
° Press release, University of Colorado, Boulder
° Press release, NASA
° Press release, NSF
° SOHO Michelson Doppler Imager (MDI) project, Stanford University
° The Pulse of the Solar Dynamo, Stanford University
° SOHO, ESA
° Global Oscillation Network Group (GONG)