vulcanologist
/ˌvʌlkəˈnɑlədʒɪst/
noun
- A scientist who studies volcanoes and volcanic activity.
- She became a vulcanologist after being fascinated by Mount St. Helens as a child.
- The team of vulcanologists set up sensors to monitor the earthquake swarms.
- The vulcanologist warned the town about the approaching lava flow.