We know that Mount St.Helens is the volcano in the Cascades most likely to erupt again in our lifetimes. It is likely that the types, frequencies, and magnitudes of past activity will be repeated in the future.
People Also Ask
The last such eruption at Popocatepetl was around A.D. 800. The eruption destroyed nearby settlements and culminated in mudflows that blanketed the Puebla Valley. An eruption of this magnitude today would endanger hundreds of thousands of lives.
Rising gradually to more than 4 km (2.5 mi) above sea level, Hawaii's Mauna Loa is the largest active volcano on our planet. Its submarine flanks descend to the sea floor an additional 5 km (3 mi), and the sea floor in turn is depressed by Mauna Loa's great mass another 8 km (5 mi).