| These areas are known as hydrothermal regions, fumarole fields, or solfatara fields. |
| But if the fumarole continues active, hydrochloric acid issues with the smoke, and often some time after sulphuric acid. |
| The most typical signs of an impending eruption are shallow earthquakes, ground deformation, increased volcanic gas release, increased fumarole vigour and temperatures, and minor landslides and rockfalls. |
| This fumarole is only a bomb or rounded mass of enormous size, four or five metres in diameter. |
| Surprisingly, Saunders suggests a start at the fumarole on the side of Chihsing Shan. |
| He survived only by lying next to a thermal fumarole, scalding one side of himself while freezing the other. |
