"Geologists believe that the Yellowstone supervolcano could explode at any moment. There are signs of growing activity there. Therefore it suffices to push the relatively small, for example the impact of the munition megaton class to initiate an eruption. The consequences will be catastrophic for the United States, a country just disappears," he said, according to a translation by Sydney Morning Herald.
I don't think I can make grammatical sense of that part on my own. Please help.