The investigation shows various natural events that affected both volcanoes.
- Sinac photos -

Published on Thursday, July 22, 2021

By the A.M. Costa Rica staff

The Irazú and Turrialba volcanoes, both located in Cartago Province, are interconnected below the ground. This means that when a natural phenomenon happens in one volcano, the other is directly impacted, according to a study by the National Institute of Geophysics and Volcanology of Italy.

The research about the connection between both the Irazú and Turrialba volcanoes was published in the scientific journal Earth Planet and Space.

The research was led by Dmitri Rouwet from the Italian Institute with the participation of Costa Rican volcanologists Gino González, Raúl Mora, Carlos Ramírez and Italian scientists.

According to Volcan Sin Fronteras (borderless volcanoes in the English language), a non-governmental organization dedicated to the study of volcanoes, this investigation shows various natural events that affected both volcanoes.

For example, the January 2010 eruption registered in the Turrialba volcano impacted the hydrogeological system in both volcanoes.

The eruptions and the intense gases emanating from the Turrialba volcano expelled large amounts of water and part of these fluids were found on the surface of the Irazú volcano feeding its main crater lake.

The lake in the Irazú volcano began to form again in 2017 when the activity of the Turrialba volcano decreased considerably.

According to Gino González, a Costa Rican volcanologist, this work is essential to prevent a possible collapse of the Irazú volcano and the potential impact that this event could cause in nearby inhabited areas.

“Currently, there is a clear inclination of the northern side of the Irazú volcano and the Sucio River will transport this material (after having fallen from the volcano)," González said. "That is the reason it is important to evaluate the impact of an eventual collapse in the infrastructures (over the rivers that flow in the lower areas of the volcano) such as the bridge over the Sucio River and other buildings."

The goal is to work from now on to reduce a possible disaster, González added.

In September 2020, the government relocated telecommunication towers located at the top of Irazú Volcano National Park that had collapsed after multiple landslides.

After eight years of being closed to the public due to the risks of eruptions, the Turrialba Volcano National Park reopened in December 2020.

Should the authorities close the Irazu park access to prevent damage from potential landslides? We would like to know your thoughts on this story. Send your comments to


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