Seamount

Some bad news, or a minor inconvenience: start the clock. Ninety seconds.

An earthquake—then, an undersea volcano, jostled from slumber, erupts. Lava deposits, a seamount forms and climbs higher and higher. Eruption after eruption it rises until it breaches the surface of the ocean. An act of creation: an isolated island appears. 

I will find myself alone there in a place that I created.