NSO/GONG

Farside Images

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Seismic images of magnetic activity on the farside of the Sun that we cannot directly see from Earth. The images show sound wave travel time variations, with locations of shorter travel times appearing darker. These darker regions indicate locations where there is an accumulation of magnetic field on the far surface.   Both a Line of Sight projection (left) and a Longitude ― Sine of Latitude projection (right) of the farside images are shown. (more info)

The method for estimating far-side magnetic activity was developed by Charles Lindsey and Doug Braun of Colorado Research Associates, a division of Northwest Research Associates, Boulder, Colorado. (references and links)

Calibrated Far-Side Map

Latest ImageLatest Image
08 Feb 2010 12:00 UT(ascii file)Info

Latest Farside Maps from GONG

Line of Sight Longitude ― Sine of Latitude
Latest LOS Image Latest Image
08 Feb 2010 12:00
Latest LOS Image Latest Image
08 Feb 2010 00:00
Latest LOS Image Latest Image
07 Feb 2010 12:00
Latest LOS Image Latest Image
07 Feb 2010 00:00


Links of Interest

Press releases and media coverage of initial far-side announcement:


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Generated: Tue, 09 Feb 2010 12:08:05 MST National Solar Observatory