One of the most explosive volcanoes in U.S. history began its eruption with a trickle, not a blast. Mount St. Helens' gas-laden magma oozed into the cone before the mountain finally erupted in 1980.

A dormant volcano in Russia’s Kamchatka Peninsula has recently come back to life after more than 400 years of inactivity. The Krasheninnikova volcano began erupting in early August 2025, capturing the ...