Such stars can have violent eruptions early on, but are extremely stable afterward. (discovermagazine.com)
Such shapes form when gas bubbles expand in molten rock that then catastrophically explodes — a feature of violent eruptions involving water, and which can be seen under glaciers in Iceland, for example. (sciencedaily.com)
The 3,000 meter (9,800 ft) Agung — a so - called strato - volcano capable of very violent eruptions — has recorded a sharp rise in activity that has raised worries about a repeat of a 1963 eruption that killed more than 1,000 people. (scientificamerican.com)