we live on the skin of a world, we know very little about what goes on beyond about 7 km below our feet (not an expert. correct me) what we think we know is based on theories and experience. Seeing that the skin of an apple is far thicker relatively than the solid earths crust, only an idiot would be certain about the future. Volcanos and earthquakes have happened where no history of siesmic activity has been recorded. Why? because we have been recording things for about 5000 years, earth works in terms of millions of years.