While it hasn't had a major eruption in recent history (last one was in 1909), it is considered dormant rather than extinct. This means it has the potential to erupt again in the future.

In fact, there are signs of volcanic activity, such as:

* Fumaroles (vents that release steam and gases)

* Small earthquakes in the area

* Deformation of the volcano's slopes

The Canary Islands Volcanological Institute (INVOLCAN) closely monitors Mount Teide for any signs of unrest.