Sun  ID: 3336

The Visible Sun Revisited

Scientists working with the SOHO/MDI instrument have continued to improve on previous results. Since the first release (SOHO/MDI's 'Window' Through the Sun), improvements in helioseismology techniques have enabled them to extract more information from the same data. In this case, sonogram-type imaging of the solar far side (the side of the Sun NOT facing the Earth) has been improved to provide a more complete view of the farside. This is important in space weather forecasting as it enables us to see large sunspots and active regions before they are visible directly from the Earth. Active regions are a source of solar flares which can send high-energy protons towards the Earth. These protons can damage satellite electronics, endangering communications and weather forecasting, and are a health threat to astronauts.

Visualization Credits

Tom Bridgman (GST): Lead Animator
Philip Scherrer (Stanford University): Scientist
Joe Gurman (NASA/GSFC): Scientist
Please give credit for this item to:
NASA/Goddard Space Flight Center Scientific Visualization Studio

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Data Used:
SOHO/Michelson Doppler Interferometer (MDI)/Continuum
NASA and ESA - 2003-Sep-06 to 2003-Nov-19
Note: While we identify the data sets used in these visualizations, we do not store any further details nor the data sets themselves on our site.

Dates of Data Used:
2003-Sep-06 to 2003-Nov-19

SVS >> Helioseismology
SVS >> Solar Rotation
DLESE >> Space science
GCMD >> Earth Science >> Sun-earth Interactions >> Solar Activity >> Sunspots
NASA Science >> Sun

GCMD keywords can be found on the Internet with the following citation: Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version