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Fig. 3.

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Composite maps showing the very large active region NOAA 12192. Shown are composite maps, but for different Carrington rotations. STEREO observations are not available for comparison. Panels a,b: seismic map for September 29, 2014 (constructed as Fig. 2a) and the average over September 28–30 (constructed as Fig. 2b). The longitude is that of Carrington rotation 2155. Panels c,d: same as above, but 13 days later. Active region NOAA is very clearly seen on both the near and far sides.

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