| Seismologists and volcanologists use both seismic and infrasonic signals to monitor volcanic activity. |
| Stationed at the Montserrat Volcano Observatory, she and other volcanologists had been keeping a close eye on the restless mountain for two days. |
| Rainier is a composite volcano built of lava and fragmented rock and while volcanologists say it's unlikely to erupt again in the near future, they always add a small corollary. |
| Philippine volcanologists said a hazardous eruption is possible within weeks. |
| The volcano continued to have several earthquakes daily, with volcanologists watching the volcano closely. |
| Some volcanologists refer to extinct volcanoes as inactive, though the term is now more commonly used for dormant volcanoes once thought to be extinct. |
