| But if the fumarole continues active, hydrochloric acid issues with the smoke, and often some time after sulphuric acid. |
| Elias inserts a tube into one productive fumarole and collects a sample of the noxious fumes for later analysis. |
| A fairly constant fumarole can be seen emanating from the crater. |
| These areas are known as hydrothermal regions, fumarole fields, or solfatara fields. |
| There is evidence of volcanic activity in the crater itself, however, including a small cone, recent fumarole activity, and the fact that the lake remains unfrozen in winter. |
| We're heading to Fumarole Beach in the north of the island, home to one of Ischia's hottest thermal springs. |
