Recently, news of volcanic eruptions around the world has been frequently reported, as if it is erupting in groups. What is going on? What's going on inside the earth?
Pacific Hawaiian Islands On the evening of November 27th local time, Maunaloa volcano and Kilauea volcano on the archipelago, erupting at the same time. The former is currently the largest active volcano in the world. The height from the seabed to the top of the mountain exceeds 10,000 meters, which is more than 1,400 meters higher than Mount Everest , and it is considered the largest single peak in the world. The latter is also a world-famous active volcano, located in the southeast of Hawaiian Islands, second only to the former. These two active volcanoes erupt at the same time, indicating that the pressure of lava under the crust of the central crust of Pacific is increasing, and geological activities are becoming very active.
However, the most famous volcano eruption recently was not these two volcanoes, but the Semeru volcano on Java, Indonesia and the volcano on Stromboli, north of Sicily, Italy, erupted again, because both volcanoes are close to densely populated areas of human habitation. Among them, Semeru Volcano is the highest volcano and a well-known mountaineering scenic spot on Java Island. It is 3,676 meters above sea level. On December 4, the volcano began to erupt on a large scale. The local area issued the highest-level volcano eruption warning, and thousands of people were urgently evacuated.
htmlOn November 5, the volcanoes on the island of Stromboli, Italy also began to erupt. The ash column rushed to thousands of miles high, and a large amount of lava flowed out of the crater. The local area issued an orange warning for volcanic activities, and schools in dangerous areas were closed urgently.
November 3, Japan Sakurajima Volcano erupted again! volcanic ash is about two thousand meters high, and thunderstorms are constantly in the ash column.
On November 27, the Viliarica volcano in southern Chile, South America showed signs of eruption. Lava had already emerged at the crater of the top of the mountain, white smoke rolled up from it, and seismic activity also increased frequently.
earlier on November 22, Hiveluchi volcano erupted on the Kamchatka Peninsula in Russia, 32 years after the last eruption.
It can be seen that volcanic eruptions around the world have been very frequent recently. So what causes volcanoes to erupt in groups around the world? It is obvious that the lava activity inside the earth is increasing and the pressure is increasing, so that magma will rush out from the ground and jet it onto the ground.
In fact, while volcanic eruptions are frequent, the frequency of earthquake activity is also increasing at the same time. On December 6, a magnitude 6.2 earthquake occurred in the southern waters of East Java Province, Indonesia in the afternoon of the same day. On December 5, two earthquakes occurred in Tonga Islands, magnitude 6.7 and magnitude 5.5. In December 3, magnitude 6.8 earthquakes occurred in southern Java Island, Indonesia. In November, there were many earthquakes of magnitude 7 or above in the Pacific Rim of .
These all show that the earth is "funny" inside, and the geological activities of lava and plates are increasing. What is the reason for this? Scientists are not very clear, but overall, the earth's volcanic and seismic activities have certain periodicity, but the specific laws are difficult to grasp. Some theory believes that the period is 11 years, or some people have found that this period is as long as the activity period of sunspots and flares . In fact, this period is judged based on the solar activity cycle , because the theory believes that the activity of sunspots and flares will also trigger the activity of earth's geological activities. The root of earth's geological activities comes from the sun, but it is difficult to explain how it triggers it, because the mass and distance between the sun and the earth are the same as usual, and the gravity does not change, so why does there be the same activity cycle?
There is also a theory that the impact of solar activity on earth's geological activity is achieved through Earth's magnetic field , because more solar wind will erupt during the solar active period. These plasma gas groups carry a large amount of charge. After being captured by the Earth's magnetic field, they will change the magnetic field intensity and the state of the atmospheric ionosphere to a certain extent. The changes in the magnetic field will cause the activity of geological activities within the earth, so the volcanic earthquake phenomena will increase, so the geological activities on the earth are also likely to be related to the sun.
In addition, the difference in the operating positions of the sun, moon and the earth will also cause changes in the magnitude of the gravity affected by the earth, which will cause a certain amplitude (very small) deformation of the earth, which will also change the pressure environment inside the earth, thereby triggering magma and plate activities, and volcanic and earthquake phenomena will be more likely to occur.
Reference:
"Southern Metropolis Daily" article on December 6 "Volcanoes in many countries are erupting, what's the situation? 》
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