It just looks like an engineering catastrophe about to happen.

trip to the underworld might be a few minutes  long instead of a catastrophe that produces  

It's known as the Mongol Catastrophe.

create a global catastrophe which is estimated to occur

man-made global catastrophe. Though the clock more recently

catastrophe.

catastrophe wiped out the dinosaurs

There's no catastrophe.

is that catastrophe is what defines tragedy.

The alternative is only whether the crisis should come sooner as a result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved.”

As a nation, we’ve undertaken desperate measures to avoid abandoning the continuation of our credit expansion – a delusionary course that leaves a final catastrophe of the currency as our most likely outcome.

them they all agreed that if it happened, it would be a catastrophe.

but you have agreed that it would be a catastrophe if it happens.

This is a catastrophe.

A Furchester catastrophe.