A very large volcanic landslide occurred at the Askja stratovolcano in Iceland on July 23, 2014.
The 1-km wide landslide generated 50-meters-high tsunami waves.
A giant volcanic landslide created a tsunami after 24 to 60 million cubic metres of rock debris fell into a lake at the Askja stratovolcano in Iceland.
What is the cause of this giant volcanic landslide?
Right now, there are lots of hypotheses, but the real cause of this volcanic landslide is still unknown and mysterious. Some suggest snow/ice melt. I would bet on wind and water erosion as the slopes of the volcano are very steep. In this case, the slope may have been steadily destabilising with time. Watch a video of the aftermath of this giant volcanic landslide.