Radon gas is one of the main sources of natural exposure to ionizing radiation for humans, and is particularly significant in volcanic areas—both current and extinct. For example, high concentrations of radon are also found in the Alps! Mount Etna, the largest active volcano in Europe, is an ideal case study for understanding this invisible, odorless gas. But is it dangerous to vacation in a place where radon emissions are constant and widespread? Are there any short- and long-term health risks?
Mount Etna and Radon
Radon is a gas that originates from the decay of uranium present in rocks and soil. Being colorless, odorless, and tasteless, its presence is not detectable without specific instruments. However, it can accumulate in closed environments, such as homes and underground spaces, reaching concentrations that are dangerous to human health.
In the context of Mount Etna, the presence of radon is closely linked to the volcanic nature of the area. Lava rocks, soil fractures, and gaseous emissions typical of volcanic areas facilitate the rise of radon from deep layers to the surface. Furthermore, seismic activity and variations in the volcano’s internal pressure can significantly influence radon concentrations. Numerous studies conducted in recent decades have highlighted how radon concentrations in the Etna area can vary significantly over time and space. In some areas, especially along active faults or near craters, particularly high levels are recorded.
Good News
The bad news is actually quite limited:
1) radon “creeps” close to the ground, concentrates in closed environments, and stagnates near the ground, making it easy to breathe in on ground floors, first floors, basements, and cellars;
2) If you’re continuously exposed to radon, your body can become ill.
The good news is that if you’re exposed to radon gas for just a few days, you’re not at risk. So don’t cancel your vacation to Mount Etna! You’re not in danger!
1) Radon is more easily released near active tectonic faults, but fortunately, moving just a few hundred meters is already safe.
2) If you live on a lower floor, opening your windows for a few hours every day, creating air currents, reduces the concentration of radon in the air.
3) By directly creating ventilation and drafts between the foundation and the floor, radon is dispersed before it even enters your home.
A useful gas anyway
Radon is often used as a geochemical indicator in volcano monitoring systems. Sudden increases in its concentrations in the soil or air can be related to magma movements or changes in the volcano’s internal structure. Although it doesn’t represent a clear sign of an impending eruption, radon monitoring contributes to a better understanding of Etna’s dynamic processes.
In conclusion, understanding the behavior of radon—on Etna and not only there—helps protect the health of local populations, but also contributes to the study of the deep processes that regulate the activity of one of the most fascinating and studied volcanoes in the world. And… no, it’s not dangerous at all for ttourists, who only stay on Etna for a few days.