I have often wondered why we don’t drill adjacent to a volcano and tap the heat energy for steam production. The energy needs of the whole country could be supplied with what is available.
It's been done the world over. It's called "geothermal power." Here's the Geysers Powerplant in Northern California.
It is technically very hard to do. This is a severe corrosive environment due to all the sulfur and other corrosive minerals in the earth. You have a lot of very dirty water to clean up.