Cataclysmic cloud of asteroid bits

I am wanting my 32km x ~7.5km buried space habitat to be hit with a cataclysmic disaster which changes things from everyday life to a survival lifestyle. I would like the station to be damaged to the point where the powers-that-be decide to just close the doors and walk away, but still habitable enough that some colony inhabitants could band together and work hard to restore it.

I was thinking a very fast moving extra-solar asteroid collides with another asteroid near the station. This fragments both asteroids and sends high speed debris all over the area. The station moves into the path of this and gets torn apart on the surface end from the barrage with "shrapnel" of sorts penetrating pretty deep destroying cities inside.

What is a way for it to happen fast enough that people would still be there -- that the station wouldn't just be evacuated -- especially since a station like this has a pretty advanced radar-based asteroid detection system?

Also, is there anything about this scenario which makes it implausible scientifically?

posted about 6 years ago

Sam Washburn‭

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