Ion Storms
Ion storms are intense electrical fields that can pull ships off planets, damage ships, disable cloaks, and hide minefields.
Any minefield with a center inside of an ion storm is invisible. It can still be swept by the Colonies using fighters, but otherwise cannot be swept.
Resolutes and Dark Wings, with their advanced cloak systems, are not affected by any ion storm effects.
Cloaked ships starting movement in an ion storm will have its cloak disabled.
Ion storm classes 4 and 5 disable shields and can also cause ship damage. Mass and "ship experience" can mitigate the damage from an ion storm. Higher tech engines also reduce the amount of ion storm damage: damage = 20*(10-engine tech) A ship with zero fuel automatically takes an additional 50% damage.
Ion storm classes 4 and 5 can also pull ships at 3/4 of the ion storm speed.
Additional ion storm information can be found at Donovan's