After playing the game for a couple of days now, which I'm loving by the way. The dust storm which comes in is a lovely touch and always has me running back to Base to sit in the habitat (why's he keep the door open). Introduce a radioactive cloud one on radiated worlds
It feels like it needs more of these environmental disasters as in Simcity.
Some suggestions below:
Lightening storms (could short out your Base power needing repair of generator)
Meteor showers (could happen on planets close to asteroids, would allow us to create a force field for the Base or build terrain over the Base for protection)
Asteroid impacts (rare event could be timed so if you had an observatory you cold be forewarned of disaster in advance and could either move to a safer location if it's a small impact or move planet if it's a planet killer. Could also build missile array to deflect incoming asteroids or fly too it and take it out in a armageddon fashion.
Flooding (if you had rivers and your Base is near a floodplain it could become submerged)
Volcanic eruptions (Introduce lava in caves too as an added hazard)
Earthquakes (on tectonically active planets could forewarn of a impending eruption nearby
Landslides/avalanches (Like the small rocks give certain rock types a gravity too them so when undermined they drop)
Tsunamis (Add water to allow exploration of the sea and it's depths, more array for plants and animals in this new biome as well as disaster. Cold then have docks and water based transport and submersibles.
Aliens Defend your outpost from hostile npc attack (Thinking turret defences and taking the fight to their homeworld's or outposts they have on your planet.
Items like these would keep you on your toes and keep the game fresh fill you with dread when you hear the noise of an impending disaster as the dust storm currently does.