[nicollo]

This "volcano" in Massachusetts went active for a couple hours in 1980:



Great Blue Hill eruption prank

[Rebelbase]

A guy in Alaska pulled the same prank with burning tires on volcano. Big story at one time.

https://www.forbes.com/sites/davidbressan/2021/04/01/one-of-the-greatest-april-foolsday-pranks-ever-involved-a-fake-volcanic-eruption/?sh=444f15f25eae