Caption
Longitudinal part of the magnetic field (in gauss) at each point on the sphere direction indicated by the green line in the left panels in figure 1. The strongest and weakest magnetic fields are found in the photosphere ( green loop), where strongly magnetic regions (up to 1250 gauss) are separated by others that are weakly magnetized (10 gauss). This large difference in magnetic field intensity when moving horizontally in the photosphere decreases at heights according to the lowest chromosphere (blue symbols) and is even smaller in rows between -media (black symbols) and outer (red symbols) of the chromosphere. These results confirm and confirm that, in such active regions of the solar atmosphere, the lines of force of the magnetic field expand and fill the entire chromosphere before reaching the base of the corona. .
Credit
NAOJ, IAC, NASA / MSFC, IAS.