6 volcanoes erupt in eastern Russia after 8.8 megaquake

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6 volcanoes erupt in eastern Russia after 8.8 megaquake

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Six Russian Far East volcanoes are now bursting after 8.8 Magnitude earthquake And the replicas that rocked the region last week.

Klyuchevskaya broke out first on July 30. He had already shown signs of troubles before the earthquake, and Experts have deduced that the earthquake The eruption but did not trigger it. However, it is difficult to know the exact effect of the earthquake on the volcano. The eruptions of neighboring volcanoes Shiveluch, Bezymianny, Karymsky, Avachinsky and Krasheninkov followed and continued today.

All volcanoes are sitting on the Fire ringA notorious geological characteristic for volcanic and seismic activity.

The area around this explosion parade volcanoesCalled the Kamchatka peninsula, is not very populated, so there is no active threat to local communities. However, rashes could present a risk for planes if they were to fly through the panache of ash, Harold TobinA seismologist at the University of Washington, told Live Science in an email.

Despite the recent wave of eruptions, experts say that this type of volcanic activity is not out of the ordinary. “About 40 to 50 volcanoes actively burst into the world at any time. At the moment, it is not different,” said Tobin. “Kamchatka is a volcanically active region.”

Have the eruptions been caused by the earthquake?

There is no clear or singular way that an earthquake can cause volcanic eruptions, but these two events can coexist Subduction zonesareas where a tectonic plate plunges under another.

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“It is not unprecedented for a large earthquake in the subduction zone to trigger volcanic eruptions”, ” Paul SegallA geophysicist at the University of Stanford, told Live Science in an email.

THE The largest earthquake never recorded – A 9.5 magnitude earthquake which struck Valdivia in Chile in 1960 – was followed by several volcanic eruptions. “The earthquake has changed stress into [Earth’s] The crust, which perhaps allowed the surface of the magma to climb more easily, “said Segall. The tremor of the ground by the earthquake also contributed to the eruptions by changing the movement of the magma below the surface of the earth.

These two mechanisms could have played a role in Chilean eruptions, but it is still too early to characterize recent Russian events, said Segall.

Klyuchevskoy was already showing signs of activity before the earthquake, but “it probably increased in the vigor of the eruption, including ash emissions,” said a representative of the US Geological Science on July 30.

The most notable aspect of this chain of events was the Krasheninnikov eruption For the first time in about 500 years. “Timing is either a very strong coincidence or its magma system has been disturbed by strong seismic waves and triggered the eruption,” said Tobin. “It is very difficult to determine what is true for a single eruption.”

In addition, the Ministry of Russia Emergency Situations for the Kamchatka territory reported Increase in thermal activity of a nearby seventh volcano, Mutnovsky. The satellite images have revealed a thermal anomaly of the volcano, which has not yet broken out, but scientists say that they cannot predict whether or when it could blow.