The Earth scientist who most likely studies tornadoes and cyclones is a meteorologist.

Here's why:

* Meteorology is the study of the atmosphere, including weather patterns, atmospheric conditions, and climate.

* Tornadoes and cyclones are both weather phenomena that form within the atmosphere.

* Meteorologists use specialized tools and techniques to track, predict, and understand these powerful storms.

While other Earth scientists might have some involvement in understanding these events, meteorologists are the primary experts on tornadoes and cyclones.