https://cz.sputniknews.com/20210903/vedci-varovali-pred-katastrofalni-erupci-supervulkanu-15708070.html
Scientists have warned of a catastrophic eruption of a supervolcano
Scientists have warned of a catastrophic eruption of a supervolcano
Geologists examining the dormant Toba volcano on the island of Sumatra in Indonesia have found signs that magma accumulation continues in its depths. Evidence of … 03.09.2021, Sputnik Czech Republic
2021-09-03T17:39+0200
2021-09-03T17:39+0200
2021-09-03T17:39+0200
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The eruption of any of the super-volcanoes, of which there are currently about twenty on Earth, can not only provoke global climate change, but also become a disaster for all living things. Therefore, scientists are trying to understand as well as possible the mechanisms that lead to the formation of huge volumes of red-hot magma under supervolcanoes. The results of experiments and digital modeling show scientists use geophysical instruments to observe the state of the earth’s depths beneath the supervolcanoes, so as not to miss the moment when the emergence of liquid magma begins, which, according to geological data, occurs once every few decades. Scientists from the USA, Germany , Australia and Indonesia investigated the hardened magma composition of the Toba supervolcano and determined the age of volcanic rock layers from the isotopic composition of argon and helium in feldspar and zirconium minerals. The authors found that large eruptions occurred at intervals of about 17,000 years, but even between them the volcano retained some activity. These data challenged the generally accepted theory that supervolcanoes do not pose a danger between episodes of large eruptions. Using geochronological data and thermal modeling, the authors showed that for 5-13 thousand years after each major eruption of Toba, magma continued to flow slowly into the caldera and gradually rise. rigid layers of lava like a giant tortoise shell.The authors further note that crucial for understanding the risks of new eruptions is not the presence of magma under the supervolcano itself, but its state, rate of accumulation and dynamics of spread in the earth’s crust.
Vladimir Stumpa
There were 4 extraterrestrial entities. Now there are more, so hopefully they will help. ????????????????
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eruption, volcano, research, scientists, volcano, volcanic eruption
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Geologists examining the dormant Toba volcano on the island of Sumatra in Indonesia have found signs that magma accumulation continues in its depths. This is evidenced by the slow rise of the dome of solidified lava in the caldera of the volcano. The results of the research were published in the journal Communications Earth & Environment.
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The results of experiments and digital modeling show that k super-volcanic eruptions it occurs due to the ascent of liquid magma through the earth’s crust – when ascending from a depth of over ten kilometers, it rapidly expands, leading to an explosion and a catastrophic eruption.
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“Understanding what is happening during these extended periods of calm will help us predict future eruptions of young, active supervolcanoes,” said one of the authors of the study, Associate Professor Martin Danišík, in a press release from the University of Curtin in Australia.
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Using geochronological data and thermal modeling, the authors proved that for 5-13 thousand years after each major eruption Toba volcano the magma continued to flow slowly into the caldera of the volcano, gradually lifting the solidified layers of lava like a giant tortoise shell.
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“The data obtained force us to re-evaluate the current knowledge and methods of studying supervolcanoes, which usually involve searching for liquid magma beneath them, so that we can assess future dangers. Now we have to take into account that eruptions can occur even if there is no outbreak of liquid magma under the volcano, “says Danišík, adding:” Our results show that the danger of super-eruptions does not disappear and dangerous threats persist many thousands of years later. . “
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The authors further note that the presence of magma under the supervolcano itself is not crucial for understanding the risks of new eruptions, but its state, the rate of accumulation and the dynamics of propagation in the Earth’s crust.
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