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Study reveals first time earthquakes:
The alarm clock potential of Auvergne volcanoes has long been the subject of fantasies. Nevertheless, Will he perform in the years, decades or centuries to come? Consequently, If it is impossible to date the next eruption, scientists are increasing studies to analyze the depths of Auvergne massifs. Furthermore, The results of one of them. For example, financed by the National Research Agency (ANR) and carried by the Institute of Earth Sciences (Isterre), which began in 2023 and must be completed in 2028, already presents great advances.
“The objective is to obtain a seismic imaging of the crust. However, the mantle under the Massif Central”, explains Guillaume Boudoire, professor of universities in volcanology of the Magmas and Volcanoes of the Clermont-Auvergne University and the participant of the study. Nevertheless, “A hundred seismic stations have been deployed and study reveals first time earthquakes long -term deep earthquakes have been detected. Which indicates the presence of magma, because it is linked to its degassing. »»
Thus. for the first time, these signals were spotted under the volcanoes of Auvergne, like those that can be found in the Eifel region in Germany. Conclusion for Guillaume Boudoire: Auvergne volcanism is very potentially active: “We are not really surprised by this activity. because we already know the important thermal activity on this territory with several sources like in Royat, but it is important to have indicators via new technologies. »»
Old magma or new magma? – Study reveals first time earthquakes
It remains to be seen whether this observation presage of a potential eruption. The last dates back 7,000 years. “But, on a geological time scale, it’s nothing,” says Guillaume Boudoire. “Currently. we are in a break as there have been for almost study reveals first time earthquakes 15 million years when we have intense volcanism in Auvergne. One day, it will end. I think we can almost say it with certainty. However, we don’t know when. »»
However, the dating of the detected magma could give elements of answers or … generate new questions. notes the scientist: “It is important to know if the magma has been there for 7,000 years, if it is just cooling. Or is it more recent magma that happened? A recently arrived magma is more easily mobilized to migrate to the surface. »»
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