How to make exomoon lightning storms

I have a terrestrial moon that I would like to have spectacular and frequent lightning storms. What atmospheric compositions and conditions could cause this?

Tools

• The moon orbits a 21 earth-mass ice giant (the same ice giant mentioned in this question) in a system with unusual quantities of fluorine and chlorine. A gas giant collision nearby means that it has more hydrogen and helium to work with than many ice giants, as well as possibly heavier elements.
• This article suggests that volcanic activity and atmospheric ionization can greatly increase the incidence of lightning storms. Gas residue from the gas giant collision causes frequent auroras, which might help ionize the air for lightning.

posted over 8 years ago

emo bob‭

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