Predicting a volcanic eruption
Volcanic eruptions are easier to predict than earthquakes. Volcano scientists monitor volcanoes for warning signs that a volcano will become active. Warning signs include small earthquakes, temperature increases around the volcano and the release of gas (sulphur) clouds.
In 2015, the Cotopaxi volcano in Ecuador was showing signs of increased activity, which led the Ecuadorian government to announce a state of emergency. Inhabitants of the town close to the volcano left and tourists cancelled their bookings. In the end the feared eruption did not occur, and the volcano calmed down a bit.