December 21, 2012
We are actually 20,000 years over-due for in to have erupted. It could happen any time.
== ==
they errupt
Inactive volcanoes are unlikely to errupt,however there is no guarantee that they won't errupt . Also called dormant volcanoes.
Yellowstone has a approx. 650,000 year-old cycle, and so the last major eruption was about 650,000 years ago. Therefore, the next eruption is long overdue and a major volcanic eruption is expected to occur in this century. It may be late 21st century (2070+), mid-21st century (2040+) or early 21st century (i.e. now or in the next two decades). Basically, Yellowstone will erupt that is a guarantee. Anyone guessing December 21, 2012?
never
Tommorow
2010
in 1580
,kl ,kl
June 1991
yes