The source of the above map,
From this article
Jupiter's radiation belts
As I understand the Van Allen Belts (Named after there Discoverer
James A. Van Allen ) they are captured particles from the Sun, caught in the Earths Magnetic Feild.
The Van Allen Belts
I guess any planet with a magnetic feild could catch radiation in similar fasion, I only know of one other planet that speaks radiation, Juipiters Radiation feild can be heard from earth.
Captain's Space