Volcanologist.
Volcanologists.
A scientist that studies fungi is called a mycologist.
a scientist who studys cells are called what
A person who studies volcanoes is called a volcanist, volcanologist, or (historically) a vulcanologist.
A scientist that studies bears would be called an ursinologist.
An Oceanographer. Marine Biologist, that sort of thing.
A scientist who studies mollusks is called a teuthologist.
its called a plantoligist
That person would be called a scientist
A scientist that studies motion, forces and energy would be called a physicist.
That is called a GEOLOGIST.
If you mean what do you call a scientist who studies earthquakes, that would be a seismologist.