In solar observation, a magnetogram is a pictorial representation of the spatial variations in strength of the solar magnetic field.
![](http://up.wiki.x.io/wikipedia/commons/thumb/c/c7/SDO_HMI_Magnetogram_2014-03-25T134016.1.png/220px-SDO_HMI_Magnetogram_2014-03-25T134016.1.png)
Solar magnetograms are produced by solar magnetographs. Some magnetographs only measure the absolute value of the magnetic field strength while others are capable of measuring the 3-dimensional magnetic field. The latter are referred to as vector magnetographs. These measurements are made by exploiting the Zeeman effect or, less frequently, the Hanle effect.[1]
The first magnetograph was constructed by George Ellery Hale in 1908.[2][3]
References
edit- ^ "Magnetogram Chromosphere Observed from Mt. Wilson Solar Observatory". www.ncei.noaa.gov. National Centers for Environmental Information. Retrieved 4 May 2023.
- ^ Odenwald, Sten (8 June 2012). "Solar Magnetism: Magnetograms". Digital Universe Foundation. Archived from the original on 8 June 2012.
- ^ Deborah, Scherrer. "Solar Magnetograms". solar-center.stanford.edu. Stanford Solar Center. Retrieved 5 December 2022.