As of 2014, the two most recent flank eruptions of Italy's Mount Etna were in 2014 and in 2008 to 2009. Etna is one of the world's most active volcanoes, with nearly constant lava flow and related geologic activity.
With five craters at the peak that have frequent showy Strombolian eruptions, it's difficult to classify what is an eruption. However, flank eruptions, which occur on the sides of the mountain instead of in the craters, are obvious and deadly. Flank eruptions in 1928 destroyed the village of Mascali near the volcano's base, and in 1992, the town of Zafferana was barely saved by lava control innovations, primarily earthen dams and dug channels designed to slow and redirect lava flow from a flank eruption.