Campi Flegrei Supervolcano: Signs of Unrest in Italy’s Volcanic Zone

Near Naples, Italy, the massive Campi Flegrei caldera has raised alarms as signs of volcanic activity intensify. Earthquakes, gas emissions, and shifting ground are all pointing to a possible awakening of this sleeping giant. With a history of catastrophic eruptions, scientists are closely monitoring the area, aware of the potential global impact an eruption could have.
What We Know About the Supervolcano
Campi Flegrei, or the Phlegraean Fields, is no ordinary volcano—it’s a supervolcano capable of altering the Earth’s landscape. Despite being surrounded by millions of people, its immense size and location make it one of the most dangerous volcanoes in the world.
Earthquakes Trigger Warnings
In May, a 4.4-magnitude earthquake rocked the region, the strongest in 40 years. This was followed by over 3,000 smaller quakes within six months, indicating that magma might be shifting beneath the surface. While not every quake leads to an eruption, scientists are closely watching this swarm of seismic activity.
Record Gas Emissions Signal Growing Activity

The volcanic area is also seeing a surge in gas emissions. Each day, between 4,000 and 5,000 metric tons of carbon dioxide are being released—an alarming amount for a volcano that has remained relatively dormant for centuries. This increase in gas suggests that magma is moving closer to the surface, which could precede an eruption.
Cracks Appear in the Crust

Another troubling sign is the shifting of the crust beneath the caldera. Researchers have observed that the ground, once bending, is now cracking. These cracks provide easy paths for magma to rise, which could indicate that the supervolcano is moving closer to eruption.
A City at Risk

The caldera is located near Naples and towns like Pozzuoli, home to millions. Unlike remote volcanoes, this supervolcano threatens densely populated areas, with the potential for lava, ash, and dangerous gas clouds to devastate nearby communities. Local authorities are preparing emergency plans, knowing that a major eruption could strike at any time.
Historical Eruptions Offer Insights
Campi Flegrei has erupted catastrophically in the past. Around 40,000 years ago, it unleashed one of Earth’s largest eruptions, potentially contributing to the extinction of Neanderthals. Its last eruption in 1538 formed the Monte Nuovo crater in just a few days. These historical events highlight the supervolcano’s potential to cause widespread destruction.
Rising Ground Points to Increasing Pressure

Since 2005, the ground around Pozzuoli has been rising steadily by nearly five feet due to bradyseism—an indication that magma and gas are pushing upward. This slow but steady uplift is a strong signal that the supervolcano is becoming more active beneath the surface.
Global Impact of a Potential Eruption

An eruption from Campi Flegrei wouldn’t be contained to Italy. Ash clouds could disrupt air travel and damage crops across Europe. Similar to the eruption of Mount Tambora in 1815, a massive eruption could lower global temperatures, affecting food supplies and the global economy. Supervolcanoes are capable of influencing the entire planet.
Watching and Waiting
While the exact timing of an eruption is unpredictable, scientists are using satellites and sensors to closely track every tremor and gas release in the region. Continuous monitoring is essential to keeping people informed and prepared. Though the volcano may remain dormant for years, the signs of unrest are a reminder of the unpredictable power of nature.
The Restless Giant

Campi Flegrei may be quiet for now, but it is far from still. With increasing earthquakes, rising gas emissions, and swelling ground, this supervolcano is showing signs of waking up. Scientists continue to monitor it closely, knowing that its eruption could have global consequences. As we watch and wait, the world remains on edge, reminded of the potential for nature’s raw power to reshape our future.