the electron in the magnetic field

Hello, colleagues !
I am having difficulty in this matter.
Region of localization of the electron in the magnetic field H is :
1/H or 1/H^2 or H^2

That questions seems not very well defined to me. Are you talking about an electron moving in a magnetic field? If so, does "region of localization" mean radius of the circular path expected? If so, then you will find that radius is proportional to 1/H according to some cyclotron formulas available, or as derived from the Lorentz force law.

https://en.wikipedia.org/wiki/Gyroradius

steveB, it's great, thaks a lot. I could not remember this section.