Mount Etna, the volcano that towers over eastern Sicily, has again captivated the world with a spectacular show , spewing smoke and high into the sky.

But the defining event of Monday’s eruption was the more rare pyroclastic flow from the southwestern crater not visible from a distance.

The volcano is Europe’s most active and the continent’s largest. Etna attracts hikers and backpackers to its slopes while less adventurous tourists can take it in from a distance, most stunningly from the Ionian Sea.

Etna’s latest eruption caused neither injuries nor evacuations, but sent a group of tourists on its flanks running, as captured by video posted on social media with smoke towering in the background.

Authorities emphasized there was no danger to the population, and the pyroclastic flow — a

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