Here's why:

* Geological origin: Volcanic eruptions are directly caused by geological processes, specifically the movement of magma within the Earth's crust.

* Potential for significant harm: Eruptions can release dangerous materials like ash, lava, and toxic gases, posing risks to human life, infrastructure, and the environment.

* Wide-ranging impacts: Volcanic eruptions can cause widespread disruption, affecting air travel, agriculture, and even global climate patterns.

Other examples of geohazards include:

* Earthquakes

* Tsunamis

* Landslides

* Floods

* Sinkholes

These hazards are all linked to geological processes and can have significant impacts on human populations and the environment.