They know when a volcano is about to burst So they can get people out first. The main purpose is to protect So people don't feel the effect. Volcanologists also study the past, The old eruptions and how long they last. Volcanoes leave lots of deposits behind Made up of residue of all shapes and kinds.

How does a volcanologist help us?

Volcanologists are scientists who watch, record, and learn about volcanoes. They take photographs of eruptions, record vibrations in the ground, and collect samples of red-hot lava or falling ash. ... Volcanologists are scientists who watch, record, and learn about volcanoes.

What are volcanologist responsibilities?

Study the processes and deposits of volcanic eruptions. Gather data about where and how volcanoes are likely to erupt. Map the distribution of the rocks that make up the volcano. Perform chemical and dating analyses of rock samples. Measure volcanic seismicity, gravity and magnetics.