The continent is not a multi-volcanic country, and only 14 volcanoes have been identified so far, all of which are dormant. Among the more than 10 volcanoes, if you want to ask which one of the eruptions has the greatest impact, there is no doubt that Changbai Mountain is the same. Because it is very dangerous once it breaks out, not only mainland scientists are paying attention to it, but also international scientists are paying attention.
Changbai Mountain Volcano
Changbaishan Volcano is a continent and even in Asia, the eruption risk of the volcano is relatively strong, there have been large-scale eruptions, of which around 946 AD, ChangbaiShan underwent a very strong eruption, this eruption is also called "Millennium Eruption", is considered to be one of the largest eruptions in the past 2000 years.
The Millennium Eruption is a large-scale explosive eruption, the volcanic eruption index is as high as 7, and it should be known that the Tonga volcanic eruption, it is estimated that the volcanic eruption index is about 5, and the volcanic eruption index is 10 times more material for each higher level, and the 7-level volcano is 100 times higher than the 5-level volcano.
Volcanoes are divided into overflow volcanoes and explosive volcanoes, of which the Changbaishan Volcano is an explosive volcano when the millennium eruption, the explosion emitted about 100-120 cubic kilometers of volcanic ash, and under the action of the air flow, the volcanic ash moved from west to east along the wind, drifting to the north of Japan 1200 kilometers away, in the Hokkaido lake sediments in Japan, thick volcanic ash of up to 6-10 cm can be found, and even in the Greenland ice core have found traces of the millennium eruption, you can imagine how large the scope of the impact of this large eruption is.
Fortunately, when changbai mountain erupted for a thousand years, the vicinity of Changbai mountain was sparsely populated, causing fewer casualties. However, because the latitude of Changbai Mountain determines that the wind direction here will flow from west to east, and volcanic ash will also fall from west to east under the movement of the wind, so it will have a catastrophic impact on Japan, South Korea, etc., so scientists in these two countries are also very concerned about the volcanic situation of Changbai Mountain.
Hiromitsu Taniguchi, an emeritus professor at Tohoku University in Japan, said in 2012 that after the millennium eruption of Changbai Mountain, there were 6 volcanic eruptions in Changbai Mountain between the 14th century and the 20th century, and each eruption of Changbai Mountain Volcano had a "lot to do with the Japanese earthquake", so he believed that due to the impact of the 2011 Japan earthquake, the probability of volcanic eruption in Changbai Mountain before 2019 was 68%, and the probability of erupting volcanoes before 2032 was 99%, and the eruption index may reach 4-5. That is, the scale of small and medium-sized outbreaks.
However, at that time, mainland volcanologists and Korean scientists were skeptical, believing that although Changbai Mountain was an active volcano and there was indeed magmatic activity underground, there was no scientific basis for predicting the specific eruption time.
Xu Jiandong, a continental volcanologist, said: "The large-scale eruption of the volcano, the reproduction period is on the scale of 10,000 years." This is because after a volcanic eruption, underground magma will erupt out of the surface, resulting in a decrease in magma in the volcanic chamber, at which point it is difficult to erupt.
During the dormant time, the magma chamber needs a long period of replenishment to accumulate a large-scale eruption, otherwise it is difficult for the magma of the magma chamber to rise to the surface.
Moreover, after the millennium eruption, Changbaishan erupted several times, but the eruption level was smaller, such as vei-2 in 1898. Small-scale eruptions of volcanoes are also releasing energy, to a certain extent, can consume the magma stored in the magma chamber and avoid large-scale eruptions.
More importantly, predicting that the probability of eruption of Changbai Mountain in 2032 is 99% in fact, it is not scientific logic, although it is possible to predict volcanic eruptions today, and there are often corresponding geological activities before volcanic eruptions, but it can only be judged whether it will erupt in the near future, and can not predict the time of future eruptions, so Japanese scientists' claims have not been affirmed by mainstream scientists.
Monitor volcanoes
How beautiful Changbai Mountain is, how dangerous it is. The reason is that there is a celestial pond in the crater that holds 2 billion tons of water, which means that once it erupts, the contact between water and lava will lead to an explosive eruption, which is more destructive because it can spray hot volcanic ash farther away, and the hot volcanic ash will not only burn humans, but also cause local buildings to spontaneously combust. For example, the explosion that led to the collapse of Pompeii was an explosive volcanic eruption, and the hot ash caused people to die in an instant.
Once the Changbai Mountain erupts, the volcanic debris will also cause the water level of Tianchi to rise, and 2 billion tons of water will pour out along the edge of the volcano, forming a volcanic mudslide, causing serious damage within 100 kilometers of the surrounding area.
It is precisely because Changbai Mountain is a very dangerous volcano that the mainland has been monitoring it since the last century, and the Changbai Mountain Volcano Observatory is specially guarding Changbai Mountain, and once it finds signs of eruption in Changbai Mountain, it will issue a warning.
Volcanoes are different from earthquakes, and earthquake prediction requires three elements: time, place and intensity, while volcanoes only need to know the time and intensity, because the location is already very clear. Predicting when a volcano will erupt requires only enhanced monitoring of magmatic activity at the bottom of the volcano, which will give you plenty of time to sound the alarm before the eruption, evacuate people, and reduce losses.
At present, researchers have not detected signs of imminent eruption in Changbai Mountain, which is very safe. And even those who want to travel to Changbai Mountain in the future do not have to worry about the volcano erupting, because it is guarded by special people and is very safe.
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