The movie “Dante’s Peak,” released 21 years ago, conveyed a mostly realistic vision of what just happened in Guatemala on June 3. Unlike Hawaii’s Kilauea, where smooth-flowing lava crept leisurely across the landscape last month, fictional Dante’s Peak is a stratovolcano. So is Fuego, its real-life Guatemalan cousin, 12,332 feet tall. Stratovolcanoes are the violent cousins of the Hawaiian volcanoes.