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Planet Earth

Etna volcano activity associated with the movement of the poles of the Earth

The seismic and volcanic activity of Mount Etna correlates with the periodic movement of the poles of the Earth, which leads to small deformations of the earth’s surface. This conclusion was made by scientists from France and Italy, analyzing data on the activity of Etna in recent decades. This article was published in the journal Geophysical Research Letters .

Marco Restivo, Giuseppe Distefano / YouTube

The earth is periodically deformed on a small time scale due to several phenomena. The biggest influence is exerted by tidal forces arising from the influence of the Moon and the Sun on the Earth. This interaction results in a surface deformation of approximately 30 centimeters per day. In addition, periodic changes in the length of the day also lead to surface deformation by about a millimeter. Finally, another significant deformation factor is the movement of the poles of the Earth . The fact is that the Earth’s axis of rotation periodically shifts, essentially spinning in a spiral. This movement has a period of about a year, as well as a heartbeat with a period of 6.4 years, at which the amplitude of the movement reaches a maximum.

The deformation of the Earth’s surface due to the movement of its poles depends on latitude and reaches a maximum of about a centimeter at 45 parallels. This may seem insignificant in order to influence large-scale processes, but studies show that the deformation of the Earth due to the movement of the poles affects seismic processes.

Sebastien Lambert from the University of Paris and Gianluca Sottili from the University of Sapienza of Rome decided to check whether the Earth’s pole movements affect volcanic processes. As the object of study, they chose the volcano Etna, for which there is a large amount of data. In addition, it is convenient in that it is located on the 37th parallel, on which the deformation from the movement of the poles is close to maximum.

As the data, scientists took measurements of the position of the axis of rotation of the Earth, data on earthquakes at a distance of 43 kilometers from the peak of Etna, as well as data on volcanic eruptions. In total, data cover 227 months (almost 19 years). Comparison of the seismic energy graphs and the radius of the pole motion showed that both quantities change in a similar way and their peak values ​​fall on 2002 and 2009. In 2015, the peak is not so pronounced, because the amplitude of the pole movement in recent years has been falling. In addition, the data showed that the poles are most affected by the movement of the poles of the region no further than 30 and no deeper than 20 kilometers from the crater of the volcano. The data also showed a correlation between pole movement and eruptions.

The Earth’s magnetic poles are also subject to movement, moreover, this movement is more substantial, and not throughout the course of history they even changed places .


Planet Earth

Space sailing ship sent amazing pictures of the Earth

The space ship LightSail 2, launched in June last year, received amazing photos of our planet.

LightSail 2 is a project of the Planetary Society; It was launched in June 2019 with the SpaceX Falcon Heavy booster rocket. Unlike other spacecraft, the solar sailboat does not rely on traditional rocket engines – it uses solar energy.

The device has been operating in Earth orbit for about eight months; all in all, its mission should last about a year. According to experts who studied the work of LightSail 2, the design of a space sailboat with solar panels on only one side caused a number of technical problems, so in their opinion, future similar vehicles should have solar panels on both, reports.

The Planetary Society showed several images taken by the LightSail 2 camera. The solar sail of the apparatus is partially visible on them (in general, the sail area is about 32 square meters), and our planet is also visible.

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Planet Earth

Immediate enormous volcanic disaster predicted

Since 1999, Tungurahua has often been active, then 25 thousand people had to be evacuated from nearby settlements

Researchers at the Cambridge Mining School in Britain have predicted an imminent catastrophe, which is associated with the eruption of a large volcano in South America.

The Tungurahua volcano in Ecuador, also known as the Black Giant, shows signs of instability on the slopes, which can lead to a huge landslide. The reason for this is the recent volcanic activity and the imbalance between the erupted and incoming magma, which led to the deformation of the western flank of the mountain and increasing stress.

Since 1999, Tungurahua has often been active, then 25 thousand people had to be evacuated from nearby settlements. The previous large eruption of the Black Giant occurred about 3 thousand years ago and provoked a partial collapse of the western flank of the volcano cone. A landslide from soil, stones, snow and water covered an area equal to 80 square meters. km Later, the cone gradually recovered, reaching a height of 5 km.

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Planet Earth

A huge meteorite hit the Indian state of Rajasthan, creating a 20-meter crater and turning night into day

When it fell, the meteorite created a huge crater with a diameter of 20 and a depth of 7 meters in the factory complex at Tuesday dawn in the industrial zone of Itaran Alvara, Rajasthan.

Suddenly a rocket-like object appeared, falling from heaven to earth, changing night to day. A celestial phenomenon occurred in the Fauladpur region of Shahjahanpur in the Alvar region around 5:00 a.m. on February 12, 2020.

In the following video surveillance frames, flashes and the subsequent meteorite fall to the ground are visible. People living in the immediate vicinity were not harmed.

People living in the area woke up from weak shocks, similar to an earthquake. The birds began to scream.

Many surveillance cameras were able to record a meteorite explosion. People who witnessed the heavenly event were shocked.

Local resident Rajesh Kumar Gupta said that he felt an explosion and after leaving his house felt a gust of strong wind. Farmers in the city of Fauladpur Shahjahanpur also saw a meteorite.

Ajay Chaudhari, a resident of the Kotkashim region, said that light suddenly appeared and an object similar to a rocket appeared in the sky.

A team of scientists was sent to the crater to explore the mysterious meteorite.

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