In the context of geophysics, a "'magnetogram "'is a measurement of " temporal " variation the local strength and direction of the geomagnetic field.
2.
The best information today comes from SOHO ( a cooperative project of the European Space Agency and NASA ), such as the MDI magnetogram, where the solar " surface " magnetic field can be seen.
3.
A vector magnetograph works in a very narrow waveband around a single spectral line, for example the 525.02 HMI instrument on board the Solar Dynamics Observatory will produce a vector magnetogram every few minutes.
4.
In the context of the magnetic field of the Sun, the term "'magnetogram "'refers to a pictorial representation of the " spatial " variations in strength of the solar magnetic field.
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