Squirt again! The Japan Meteorological Agency announced that The Sakurajima Volcano erupted again, erupting four times from the afternoon of July 23 to the afternoon of The Crater at the summit of Nangatake, with the maximum height of soot exceeding 1,200 meters and the maximum falling distance of ash debris reaching 25 kilometers.
According to the Japan Meteorological Agency, as early as July 18, they had detected subtle crustal movements in Sakurajima, indicating that the mountain was slowly expanding, and finally "couldn't hold back" the eruption on the afternoon of the 23rd! For this statement from the Japan Meteorological Agency, foreign media have suggested that Japan should focus more on Mount Fuji!
Sakurajima sprays 3 times a year, why do people always "associate" with Mt. Fuji
Located near the coast of Kagoshima City, the southernmost tip of Kyushu Island, Sakurajima Volcano has an area of 77 square kilometers and is one of the most active volcanoes in the world! It is understood that Sakurajima Volcano erupts several times almost every day, with an average of 300-500 frequent eruptions per year, and a larger volcanic eruption every 4-20 hours
In fact, Sakurajima itself is a volcanic island, formed in a major eruption of an undersea volcano 22,000 years ago, tens of thousands of magma and soot poured out of the seabed, and solidified on the ground to form the current SakuraJima.
Around 2020, Japanese volcano researchers pointed out that in recent years, the frequency and intensity of the eruptions of Sakurajima Volcano have increased significantly compared with 20 years ago. Indeed, from January to July 2022, there have been three major eruptions at Sakurajima Volcano, including one on January 28, where soot was sprayed to an altitude of 3,400 meters; The second occurred at noon on June 27, when volcanic ash fell from a height of 1,500 meters, making the surrounding space a "miasma of smoke".
This is sakurajima's third eruption this year, And Japan has provided the alert level to level 5, and it should be known that the last volcanic level 5 alert was the eruption of Nagarabe Island volcano in 2015, which shows the power of the Sakurajima volcano eruption.
Every time the Sakurajima Volcano erupts, the media turns their attention to Mt. Fuji one by one as if deliberating! In fact, Mt. Fuji is located at the junction of Shizuoka and Yamanashi prefectures, about 80 kilometers from Tokyo, and 900 kilometers from Sakurajima Volcano, and Mt. Fuji and Sakurajima belong to two different lithosphere plates, so whether they erupt or not must be related.
Mount Fuji volcano on the cusp of the storm
Mt. Fuji is a world-famous active volcano, and in recent years, whenever a somewhat powerful volcano erupts in Japan, Mt. Fuji tends to be the second volcano to attract attention! According to experts, Mt. Fuji's performance in recent times has been too weird!
In 2012, Japanese media published a high-profile article quoting an influential volcano expert in Japan who said that the internal pressure on Mt. Fuji reached 1.6 megapascals. In 1707, the pressure before the Baoyong Great Eruption was less than 1.6 megapascals, and it should be known that the Baoyong Great Eruption caused 700 million square meters of magma and volcanic ash sediment to gush out and fall, almost covering up the entire Southern Kanto region! Experts also said that the pressure inside Mt. Fuji has been maintained at a high level, and it has increased in a "small step and fast running" manner!
Another piece of evidence of a possible eruption of Mt. Fuji comes from the number of craters, such as about 40 craters around Mt. Fuji, but in 2022 it soared to more than 300, and the expert explanation is that the internal pressure is too high, and the mountain is almost unable to hold on, allowing the magma to poke out.
The study found that there is a huge "storage room" 20 kilometers underground of Mt. Fuji, which is full of hot magma, which jumps up and down underground, which can easily cause low-frequency earthquakes, and the two years of earthquakes in Yamanashi and Shizuoka Prefectures where Mt. Fuji is located have increased significantly. Although there are many theories in the industry about the relationship between earthquakes and volcanic eruptions, there are indeed many active volcanoes in history that have erupted after frequent earthquakes.
Another "evidence" was discovered by the mainland Fengyun 3 satellite, which found that the snow area at the top of Mt. Fuji has shrunk significantly in the past four years through the analysis of clear sky data obtained by the satellite. In 2019, about 28.8 square kilometers of mt. Fuji's summit was covered with snow, and by 2021, the snow cover area became 10.5 square kilometers, a sharp drop of 61!
Is it caused by the rise in temperature in the area around Mt. Fuji? No! From 2020 to 2022, the average ground temperature in the Mt. Fuji area is -2.08 °C, -7.38 °C and -5.73 °C, and the temperature is within the normal fluctuation range! There is only one explanation, the high temperature inside Mt. Fuji continues, melting the snow!
The above is the "evidence" listed by some experts speculating that the situation in Mt. Fuji is not good, of course, these evidences can only be regarded as a speculation, because there is no consensus.
Written at the back: There are experts who disagree
Whether it is Sakurajima or Mt. Fuji, some experts believe that they are in the normal range of activities, and many media are blind, such as some media who regard the purchase of goggles and dust masks by the Mt. Fuji police as preparations for the eruption of Mt. Fuji, which is actually the normal operation of the police every year.
At the same time, many people overestimate the energy released by the eruption of Mt. Fuji! Although the internal pressure of Mt. Fuji is high, the proven magma capacity is very small, and the energy released by the eruption is about the level of VEI-5, covering an area of 1-10 kilometers, and it is a joke that they flood Tokyo.
At present, there is controversy among experts about the increase in the number of volcanoes in Sakurajima and the unusual manifestations of Mt. Fuji! Maybe for quite some time to come, there won't be a massive volcanic eruption, and maybe it's close at hand.
#日本九州樱岛火山喷发 #
Original: Blog post