Maybe I should also re-insert something about Konocti's notorious internal cavern. It is one of the real mysteries about the mountain, it's riddled with caves which have either collapsed or been filled in for safety reasons. There is a serious, ongoing attempt to excavate a tunnel and connect with the main magma chamber. Supposedly it might be the largest vertical cavern on Earth (although it is probably partly filled with water). A lot of local people are convinced it existsit's just damned difficult to reach.