The Earth's surface annually averages 15 strong earthquakes, of magnitude 7 per Richter and stronger. Occasionally, however, there are also more intensive periods, when there are 30 annual such earthquakes.
In their most recent joint scientific work, experts from the University of Colorado and the University of Montana have concluded that the cause of such oscillations or at least one of the causes could be overcome in periods in which the Earth rotates somewhat slower than usual. It is about tiny changes in the speed of rotation, only milliseconds per day.
However, as our planet is enormous to us and how enormous amounts of energy are hidden in the basket and below the crust, so small changes in rotation lead to the release of enormous amounts of energy. This means large seismic strikes, especially in highly populated tropical areas, scientists say.
"Great earthquakes seem to be globally synchronized, so they are time-bound in line with their traits and appear in groups in response to very small strain changes," says a summary of an article published in Geophysical Research Letters. This kind of thesis was recently presented by Geological Society of America by Roger Bilham and Rebecca Bendick. They then stated that next year, our planet (and all of us who are doing it) is facing a five-year period of increased seismic activity.
Mechanisms they describe are generally reduced to the fact that Earth is not homogeneous, but consists of different materials; first atmosphere, then bark, then cloak, then liquid outer and then solid inner core. Above that, the bark itself consists of different parts. So when rotation changes occur, basic physics says that it is merely necessary to adjust the rotation or angular momentum of each part in relation to the position on our planet. In a period of slower rotation, the country entered four years ago, scientists said and predict that we could expect at least 20 strong earthquakes in 2018. It is not the only trouble that threatens Earth. As one of the possible causes of intensified and frequent earthquakes, including volcanoes, scientists have increasingly mentioned climate change in recent years.
Due to the higher concentrations of greenhouse gases in the atmosphere, primarily CO2 from coal, oil and gas, the atmosphere is heated, glaciers and ice-covered poles dissolve. At a time when huge masses become so critical that pressure on places where thousands of years of ice have been leaked, it no longer prevents the pressure from the depths of the bark to penetrate the Earth's surface, and it is expected that a earthquake would be expected. Or volcano.
For some years, for example, some geologists have seriously considered that in the paleolithic "recent past" perhaps the drastic change of the Earth's axis or even the sketching of the entire Earth's crust may have occurred, and all the consequence – the relatively abrupt build up of ice cover in North America due to the appearance of the last ice age, which by its mass disrupted the way in which the Earth had been rotated so far
Some even think that the memory of a cataclysmic event of earthquake, volcanoes and tsunami that would then follow, survived in the collective consciousness of mankind, perhaps even surrender, to this day, as a series of myths across isolated human populations to the world over a great flood . Or even Mythical Atlantis, transmits Express .