1792 Unzen earthquake and tsunami
Two large earthquakes were followed by a collapse of the eastern flank of Mount Unzen's Mayuyama dome
Shimabara Peninsula of Nagasaki Prefecture, Japan
On the night of 21 May, two large earthquakes were followed by a collapse of the eastern flank of Mount Unzen's Mayuyama dome, causing a landslide which swept through the city of Shimabara and into Ariake Bay, triggering a great tsunami.
