Picture Of The Month

November 2014: NOAA 12192, the largest active region of solar cycle 24?

NOAA 12192 is the identification number of one of the largest regions of strong magnetic activity seen in the current solar cycle 24, which started back in January 2008. The NOAA 12192 active region appeared on the solar disc on 17 October 2014, harbouring several large sunspots visible even to the naked eye. The size of the active region was gigantic, with an area extending over 2750 millionths of the visible solar hemisphere (MHS). The largest umbral diameter reached up to 22000 km, almost twice as big as the diameter of Earth. By 27 October 2014, NOAA 12192 ranked 33rd in the list of...(Read more)

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October 2014: Beginning of Ph.D. appointment for Andrei Gorobets

A new analysis method for solar surface magnetism. Standard algorithms for tracking small scale magnetic features suffer from ambiguities due to the intrinsic complexity of the feature interactions which are driven by photospheric convective motions.In his Ph.D. work, Andrei Gorobets will work on an alternative concept for tracking the evolution of photospheric magnetic features, which sidesteps the uncertainties of conventional direct feature tracking methods. The new method essentially considers the magnetic flux evolution pixel by pixel in a time-ordered sequence of magnetograms: the flux...(Read more)

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