Not directly related to the Van Allen Belts, but the
Magnetic North Pole, a story from NASA.
I haven't heard about any other terrestrial radiation belts. I think Mars has little to no internal activity to drive the dynamo that results in the magnetosphere. Same, strangely for Venus. All the heat seems to exist at the surface, no molten cores.
Interesting in regards to the formation of the solar system, it would suggest the Earth is younger than Venus. Mars, being further from the sun could have, understandably cooled faster than the Earth, being smaller and further away, but Venus ?? Any Planatary geologists want to enlighten this topic?