December volcano uptick! Russia's volatile Shiveluch volcano on the Kamchatka Peninsula blows ash 40,000ft (12km) into the sky

Shiveluch's June 2017 eruption credit Wikipedia

Russia's volatile Shiveluch volcano on the Kamchatka Peninsula blows big... 
A powerful explosion has sent ash possibly up to 40,000ft (12km), prompting KVERT to raise the Aviation Colour Code to Red.
Activity has recently returned to a moderate level following a hiatus for most of the year.
Explosions like this are typical for Shiveluch, many have happened in the past 25 years as dome-building continues

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