Mount Fuji is a famous tourist attraction and an active volcano. When was the last eruption?

Mount Fuji is located in the south-central part of Honshu Island, Japan, just over 80 kilometers away from Tokyo, with a height of 3,775 meters, a base circumference of 125 kilometers and an area of about 1200 square kilometers. Mount Fuji has erupted many times in history. Since 78 1 was recorded in writing, it has erupted 18 times and is a typical active volcano. The latest eruption was 1707. Every eruption of Mount Fuji in history has caused a large number of casualties, leading to many disasters in Japanese history.

For active volcanic eruptions, there is often such a rule. The more frequent the eruption, the smaller the intensity level and the longer the interval. Once an outbreak occurs, it is usually more intense because of the accumulated energy. More than 300 years have passed since the last eruption of Mount Fuji, indicating that it is secretly accumulating energy.

In order to verify the possibility of Mount Fuji eruption, Japanese scientists measured and analyzed the pressure inside Mount Fuji, and found that the measured value reached an astonishing 1.6 MPa, which was obviously abnormal and greatly exceeded the conditions of volcanic eruption. At the same time, scientists estimate that the pressure of magma and gas inside Mount Fuji on surrounding rocks is several times higher than that of previous eruptions. This shows that Mount Fuji may erupt at any time now. Once it erupts, its intensity will probably set a record and cause extremely serious consequences.

According to the mountain structure of Mount Fuji and the magma channels formed during previous eruptions, scientists predict that if Mount Fuji erupts, there will be two possible modes. The first type is the lava outflow type on the mountainside. At that time, a crater with a width of 10 km and a length of tens of kilometers may be cracked halfway up the mountain, and high-temperature lava will flow out along the opening and push around at a slow speed, thus endangering the surrounding towns, villages and railway Shinkansen. However, because the lava flow is relatively slow and the time for personnel and property transfer is relatively abundant, losses and casualties can be reduced to a smaller scope through effective early warning, plan implementation and emergency rescue.

However, due to the large amount of energy accumulated this time, Mount Fuji is likely to erupt in the second mode, that is, a large amount of lava and volcanic ash erupt from the crater at the same time. Cities such as Tokyo, which is very close to Mount Fuji, are likely to be affected, which will not only cause traffic and power outages, but also cause serious air pollution, and the ecosystem of a large area, including humans, will also be seriously damaged.