Asteroid into Water: What happens?

What happens if you hurl an asteroid into a water planet or an ocean? I remember reading somewhere that 'weather' elements were not going to be implemented (e.g., tsunamis, earthquakes, etc...)

So what happens if your asteroid gets hurled into the ocean, but misses the nearby fleet? Will it create a shockwave from the impact? Create a tidal wave that'll damage ships? Or did you just waste the resources on that asteroid? If tsunamis aren't going to be implemented are there any 'wave' elements in the game?

Likewise, what if you want to remove a water-planet from play? Will the asteroid be able to chunk out craters into the water planet? And if so, will the water move towards deeper areas?
Meaning— Is it possible to 'drain' the oceans if you chunk a large enough crater into the side of a water planet? One of the livestreams showed examples of planets that had craters chunking out half of the planet. Conceivably greatly deepening the ocean in one area would result in it being filled with water and thereby creating more ground-space on the planet.
Or will water planets be invulnerable to asteroid-attacks?

I guess a more-likely scenario in that idea would be taking a giant chunk out of a shoreline. Would the ocean 'drain' into the hole, making areas that were previously rivers and oceans become ground to play on?

Addendum:
http://what-if.xkcd.com/53/
You can skip the reading and look at the pictures, that's what I mean by draining the ocean. Not all of the water will go away, but any water that has the ability to flow into the deeper crater would, thereby creating more ground for bases and unit movement.

I really like the idea of ocean's being removed for new ground to fight on. But they might just destroy the planet all the same.

Although i could be wrong, im just not sure if planets can be split in half and still fought on or if its just smashed into millions of pieces.

it probably will give some graphical effects, maybe not with start of the beta. Otherwise it would look totally stupid xD But if it will affect gameplay is another question. I think it might not, but thats probably up to the future

The planet explodes.

Mike

Well, if we want to be precise, the ocean vaporises just before or at the exact moment the asteroid hits it, and then the planet explodes just the same. It doesn't slow the asteroid down to any significant decree. I don't think that you would actually pay attention to the steam rising from the impact position when you are zoomed out to watch the fireworks.

I would not expect a significant difference between an oceanic hit and land based one since Uber has said there are not trying to do a fluid simulation. This means that tsunamis are probably beyond the scope of the game. The only difference I can imagine is the impact crater(should they get Dynamic Planet Destruction working) would be underwater.
Something they could do is it would be possible to approximate the volume added to the sea from the impact crater. and drop the sea level accordingly. Essentially they would have to is find all the connected waterways and rerun the Water fill tech with a lower Sea level. This could be interesting as it would cause the coastlines to change and make some previously accessible areas inaccessible by sea and accessible land instead.

Loss of mex spots, shockwave, and stuff will probably be just the same as when the meteor landed on land.

But apart from that? Maybe some splash GFX, but nothing really changes to the playable area since the water level remains the same. (Not only because there is no fluid dynamics, but also because that's what happens. The mass which was evicted from the crater isn't gone. It is piled up at the border of the crater, so unless the border would be above sea level by an significant amount, there would be no reason to change water level at all.)

You are right in that in Real life the Sea level is unlikely to change significantly as a result of an asteroid strike. I just though it would make some interesting gameplay.
On the Removing Mass sites though, I think it may be more interesting if it added metal sites at the impact site instead. In this way the area of the map that is now completely open and barren is also prime area to fight over. Not to mention the wall of the impact crater might make the new sites defensible as well.

I would imagine it silly if the planet gets destroyed every time. I would like to play on a half destroyed planet.

I think I read that planets hit by asteroids might end up as lava planets (might just have been a suggestion). But i think i would be cool if it was different for water planets, maybe it would turn it into a barren rocky/obsidian planet instead? You know as if the steam rapidly cooled the planet. Might be an interesting biome to play on. BiomesForTheBiomeGod!

That may be true, but what if the impact hits a shoreline. The crater would then create an area below sea-level which was previously above. Provided the border of the crater was also below sea-level I think it would make for an interesting gameplay dynamic if the crater would fill with water (at least as much as makes sense), thereby switching the areas allowed and disallowed by naval and land play. This could potentially alter the entire strategy of the planet.

Being able to alter the playable zones of the planet in this fashion would allow for more strategic depth.

Also another question, will a big enough "roid be able to alter the delta-v or a moon/planet..?

Eg: you have an option to either smash your new shiney asteroid into the planet and leave a massive crater, or you smash the asteroid into the orbiting moon. If your asteroid is big enough it disrupted the moon in its orbit and it slowly decays into the planet, thereby destroying a much bigger section of the planet then your asteroid would have...possibly even destroying the planet.

I don't think there's a real difference between an asteroid hitting the water or land.
Remember, the asteroid that killed the dinosaurs hit water too, and it... well killed the dinosaurs.

It would be cool if simple tidal physics would take effect and damage the coast near where the asteroid hit. Or have the tidal wave destroy small boats and damage others.

Mike,
Stop being Mike.
Mike

Let's say an asteroid hits a shoreline and it caused the body of water to spread very thin. What would then happen to any ships, submarines, and underwater buildings that were in that body of water? Would they be destroyed or simply immobilized?

It could be challenging to implement game mechanics that accommodate for this situation elegantly, efficiently, and fairly.

They'd probably be pushed along with the rushing water. No reason to expect them to stay still during a comet rocket impact.

Gameplay-wise, I don't expect the outcome to be much different to hitting on land. Units in and around the impact site get damaged and destroyed, and the impact site terrain is deformed with a large crater + metal deposits iirc.

I don't think the devs have discussed water being simulated to the level where any of this would play out differently than hitting land. Assuming it isn't be especially simulated then the additional depth at the impact site(from the crater) probably won't cause the water level to lower(this could be possible, and cool, depending on how the engine deals with water regions I hope this is discussed/investigated while the devs work on planet impacts), or create any kind of disastrous wave(probably wouldn't be possible at all, imo).

Massive crater that forces the ocean levels to drop with subsistent lava in the dry areas and massive new fissures forming from the crater across the planet?

Edit: you could have the impact to drop total would wide water levels, leaving naval stuff stranded and beached, revealing new landmasses.

From a gameplay perspective the amount of damage would be similar, the crater would be similar etc. I do think it would be cool to have some water fx in there to sell it though.