What's causing the bunching is unclear, and likely involves unknown features on Titan's still largely unexplored surface.

We believe that it's no coincidence that Titan's south polar cap of smog extends from the pole to 40 degrees south latitude -- exactly where the methane cloud band appears.

Imagine how curious it would be if beyond Earth's poles, clouds existed only at the latitude that crosses New Zealand, Argentina and Chile.

Titan's weather is very different from Earth's.