| Sierra Negra(expression, activity, name, volcano, geology) |
| Silverthrone Caldera(expression, activity, name, volcano, geology) |
| Soufriere Hills(expression, activity, name, volcano, geology) |
| Taal Volcano(expression, activity, name, volcano, geology) |
| Tao-Rusyr Caldera(expression, activity, name, volcano, geology) |
| Tawhaki Patera(expression, activity, name, volcano, geology) |
| Tinguiririca Volcano(expression, activity, name, volcano, geology) |
| Trident Volcano(expression, activity, name, volcano, geology) |
| Tseax Cone(expression, activity, name, volcano, geology) |
| Tupan Patera(expression, activity, name, volcano, geology) |
| Turrialba Volcano(expression, activity, name, volcano, geology) |
| Tuzo Wilson Seamounts(expression, activity, name, volcano, geology) |
| Tvashtar Paterae(expression, activity, name, volcano, geology) |
| Ukinrek Maars(expression, activity, name, volcano, geology) |
| Unnamed Syrian Volcanic Field(expression, activity, name, volcano, geology) |
| Volcan Barcena(expression, activity, name, volcano, geology) |
| Volcan Tacana(expression, activity, name, volcano, geology) |
| Volcan Wolf(expression, activity, name, volcano, geology) |
| Volcan de Colima(expression, activity, name, volcano, geology) |
| Volcan de Fuego(expression, activity, name, volcano, geology) |