Scientists from the United States, Australia, Germany and Indonesia said that the powerful eruptions of super volcanoes give rise to weaker ones for tens of thousands of years. The results of the study are published in the journal Nature Communications.
“Recovery after the eruption of the super volcano is a long process when the volcano and the magmatic system are trying to return to a stable equilibrium, like the surface of a pond into which a stone was thrown,” said one of the authors of the paper, a graduate student at the University of Oregon, Adonar Muchek.
Scientists have found a link between the recent eruptions of the Sinabung volcano in Indonesia and Toba, a super volcano located 40 km away. Chemical analysis has shown that these two volcanoes are interconnected, that is, the Toba system may be more extensive than previously thought.
“Over the millions of years of existence of the super volcano there can be several eruptions. But between them the activity does not stop. Scientists have long suspected that a more powerful eruption is followed by weaker ones, but only now we were able to determine the exact time of these eruptions, “explained the co-author of the study, a volcanologist from the University of Oregon Shanaka de Silva.
Toba volcano is not less than 1.3 million years old, its last powerful eruption occurred 74 thousand years ago, and after that there were at least six notable eruptions. The last of them happened 56 thousand years ago, however, as the authors of the paper note, several more eruptions remain unexplored.