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How scary is Japan's Mount Fuji

Mt. Fuji seems a little dumb

By Robert JackPublished 2 years ago 5 min read

Mount Fuji in Japan, is a world-famous scenic spot and is also an active volcano, recently, there is news that Mount Fuji seems to be a bit stupid, which undoubtedly triggered people's concern, then Mount Fuji in the end how scary? If Mount Fuji erupts, how serious are the consequences? Let's talk about this topic below.

The first thing to say is that for us humans, large-scale volcanic eruptions are indeed quite scary, a typical example is that on April 5, 1815, the Tambora volcano located in the northern part of Sumbawa Island, Indonesia, erupted violently, releasing debris flows, lava flows, volcanic, ash and the subsequent earthquake and tsunami, directly causing tens of thousands of humans in the nearby region to lose precious lives.

Even more frightening, over the next few years, the material ejected from Tambora spread with the flow of the Earth's atmosphere, dramatically reducing the amount of solar radiation that the Earth's surface could receive, resulting in 1816 being the lowest average temperature in recorded human history.

This year was also known as the "year without summer", and due to the abnormally low temperature, there was a massive failure of food harvest or even no harvest at all, which led to an extreme shortage of food in many regions of the world, causing human suffering at that time.

Thus, if the eruption of Mount Fuji had such power, it would have caused serious consequences, but the question is, can the power of the eruption of Mount Fuji reach this level?

In short, the area where Mount Fuji has located isin a more active volcanic region, and over hundreds of thousands of years, intermittent volcanic movements continue to spew out material, some of which is cooled and stacked in layers, eventually forming what we now see as Mount Fuji.

The modern Mount Fuji on Earth belongs to the conical volcano in terms of shape, and its elevation is about 3,776 meters, which may not seem high, but the reality is that this elevation is high on the islands of the Earth, so much so that the height of Mount Fuji can be ranked 7th among the many high mountains of the global islands, and there is an important condition for the formation of a conical volcano of this elevation, that is, in its formation process There must not be too violent eruptions.

To illustrate this point, let's take a look at Mount Tambora. Relevant data show that before the eruption in 1815, the elevation of Mount Tambora was about 4,100 meters, and after the eruption, its elevation plummeted to about 2,851 meters, while at its summit, a huge crater with a diameter of about 6,000 meters and a depth of about 700 meters was left behind.

The main crater at the top of Mt. Fuji, on the other hand, is only about 780 meters in diameter and only about 240 meters deep, which is simply not comparable. So reasonable speculation is that in days gone by, the Mt. Fuji eruption was far less powerful than that of Tambora in 1815, and indeed, the history of Mt. Fuji eruptions recorded by humans supports this view to some extent.

In the credible records that can be traced, Mount Fuji erupted more than ten times, the earliest of which occurred on July 31, 781, and e latest occurred on December 16, 1707, according to scientists' estimates, in these records, the largest eruption index is about level 5, compared to 1815, Tambora's eruption index reached level 7. This is two levels higher.

It is important to know that for each level of the eruption index, its power can be increased by 10 times, which means that since human records, the largest eruption of Mount Fuji is only about 1% of the eruption of Mount Tambora in 1815.

The scientific community generally believes that even if Mount Fuji erupts eruption index is at most about 5, this level of eruption is not at all as terrible as imagined, and its consequences are not serious in the global context.

Of course, for the area near Mount Fuji, the consequences are not to be underestimated, the Japanese side has long organized researchers have simulated the possible eruption of Mount Fuji and may come to a brief understanding.

The above figure for researchers teased on known data simulation of the impact of the eruption of Mount Fuji, you can see that Tokyo (Tokyo) is located in this range, researchers speculate that if Mount Fuji erupted, the first will cause a small earthquake in the nearby area, after which the release of debris flows and lava flows may be small-scale destruction of some of the nearby low-lying buildings.

The biggest impact is the volcanic ash, you know the volcanic ash is not ordinary dust, the ash contains a large number of fia ne glass-like material, if these "glass fragments" into the human respiratory system, the consequences will be quite serious.

According to researchers' estimates, the eruption of Mount Fuji will eject hundreds of millions of cubic meters of ash, which will spread to most of the above-mentioned area within a few hours.

In addition to the serious threat to the human respiratory system during the deposition of this ash, it will also cause a dramatic reduction in local visibility and prevent roads from providing sufficient friction for moving vehicles, which will lead to the disruption of road traffic, while railroads and airports will also be shut down due to the rampant ash.

Large amounts of ash are also likely to damage power plants and communications infrastructure located outdoors and contaminate nearby water sources, leading to serious problems with local electricity, water, and communications, in addition, the accumulation of volcanic ash may also block rivers, the risk of flooding.

Researchers say that depending on the weather conditions, this bad situation will last from a few days to a few weeks, and it is estimated that tens of millions of people will be in distress if there is no timely warning or improper handling.

So, if Mount Fuji erupts, will our country be effective we do worry about this, first of all, the power of the eruption of Mount Fuji is not large, you know the aforementioned Tambora eruption will affect the entire planet because of the hundreds of billions of cubic meters of ash ejected, compared to Mount Fuji but only hundreds of millions of cubic meters of ash ejected, which is too far away.

On the other hand, the area where Mount Fuji is located is in the westerly wind belt of the earth, that is, the prevailing winds blow flow the east in this area, so even if Mount Fuji erupts, the volcanic ash emitted in the subsequent diffusion process will be blown by the wind to the depths of the Pacific Ocean, this volcanic ash is not a large amount, plus the diffusion direction is not right, so it will not cause any impact on China.


About the Creator

Robert Jack

One of the secrets of emotional stability for adults is to keep the expectations of others to a minimum.

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    Robert JackWritten by Robert Jack

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