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Comparison with GONG and HMI farside maps.

Shown here is a side-by-side comparison between the latest SECCHI beacon images and the most recent calibrated farside maps from the Global Oscillation Network Group (GONG), and the Solar Dynamic Observatory (SDO) Helioseismic and Magnetic Imager (HMI).

EUVI image revised: Wednesday, 28-Jan-2015 19:06:19 EST

Image courtesy GONG project.

Image courtesy SDO/HMI project.

The farside maps are based on an analysis of 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 (farside information and references). Candidates with a probability of 70% or higher are highlighted in red (more information).

Last Revised: Wednesday, 12-Nov-2014 11:17:57 EST
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