Volcanic eruptions are difficult to predict, but observations have shown the largest and most powerful volcano on Io, a large moon of Jupiter, has been erupting on a relatively regular schedule.
![](https://scx1.b-cdn.net/csz/news/tmb/2019/hugevolcanoo.jpg)
Source:
https://phys.org/news/2019-09-huge-volcano-jupiter-moon-io_1.html