I know there is other questions with similar concerns about there being any protocols in pace if the crew of space station were to witness a world wide cataclysm and the survivability of the crew if they were disconnected from the earth. I am wondering if the scenario were to happen, first, would there be events that would affect the ISS?
I am assuming here any world wide cataclysm that doesn't destroy the actual globe would not affect it. I am not sure in the case of an event of something being expelled from the earth (such as the crashing of something on earth such as a massive asteroid that expelled debris) or in cases where the effects can reach the atmosphere at the least (such as fallout from a massive nuclear explosion or something similar)
In addition to wether or not the crew would essentially have front row seats to the apocalypse, what would be extent of time a crew could survive?