How Volcanoes Work

 Image Described in Caption
 Gouache Painting of the Eruption of Graham Island (1831) -- Graham Island erupted in 1831, about 50 km north of Panelleria in the Mediterranean Sea. The evolution of volcanism was parallel to that observed in the 1963 eruption of the Island of Surtsey off Iceland. The initial eruptions of both volcanic islands were hydrovolcanic (Surtseyan), but the later eruptions were more Strombolian. This painting shows Graham Island in the Strombolian phase of activity. If you attempt to find Graham Island today, you will be disappointed because it rapidly eroded away by wave action in 1832. Coutesy of Peter Francis.