Originally posted by Wirral Bagpuss So if Toba does decide to blow her top , what would the tell tell signs be? How much warning can scientists/geologists give to alet the world that Toba will explode And what can the world expect to happen when it does explode. I know it will be very bad, i have watched the Supervolcano programme re Yellowstone, but just how bad will Toba be? Are we looking at a nuclear winter scenerio lasting months or years?