Propels ash more than 7 miles above sea level.

A major explosive eruption took place at Russia's Bezymianny volcano this morning (16 June 2017), propelling ash to 12.2 km (40 000 feet) above sea level, according to the Tokyo VAAC. It is the strongest eruption of this volcano since September 2012.

Bezymianny, now considered one the most active volcanoes in the world, erupted for the first time in recorded history in 1955. Within six months, it produced a total volume of eruptive products over 3 cubic kilometers (0.72 cubic miles).

For comparison, the 1980 eruption of Mount St Helens produced 1.3 cubic kilometers (0.3 cubic miles) of ash.

Prior to its 1955 eruption, Bezymianny had been considered extinct.

Thanks to Don Brown and Guy Wilson for this link