lunedì 16 febbraio 2009

The earthquakes and the displacement of the Earth’s rotation axis

All the scenarios on global warming identified by scientists before the Paris conference included a pace of global warming and melting of glaciers slower. The new data tell us, however, that climate change is a threat bigger and closer than first thought not. So we must act immediately, trying to "cool down" the Earth. How? Simple, by changing the tilt of the Earth's rotation. People will say: this man is crazy! Be quiet, calm, and let’s reflect on two phenomena.
The drift of sliding continents determines the depth of oceanic plates that affects the orbit and the rotation of Earth, with swings and variations of the rotation axis, which determines a different angle of incidence of sunlight on the surface Land, and a change in position and intensity of the earth's magnetic field (which protects us from cosmic rays).
The earthquake of 26 December 2004 ( 9 degrees Richter ) off the coast of Sumatra has shifted the Earth's axis. Already we knew that an earthquake of magnitude exceeding 8 degrees puts in motion a quantity of energy such as to alter the distribution of masses on the Earth's crust and thus is able to move the Earth's axis.
But until now never happened that this could be observed instrumentally. It was exactly 40 years that the Earth was not affected by a similar telluric movement and in 1964, the year of the great earthquake, there were not yet so sophisticated instruments to assess the movement.
One of the main italian newspapers, the “Corriere della Sera”, after the earthquake in Sumatra, interviewed Professor Bianco, director of the Center space geodesy of Italian Space Agency (Asi) in Matera, who said that "according to surveys made by satellites Lageos 1 and Lageos 2, the Earth's axis has shifted to 2 thousandths of a second of arc corresponding to a linear displacement of 5-6 centimeters. The shift has occurred precisely along the direction of the earthquake epicentre, near to the equator. So it has not changed the angle of axis (which is approximately 23 degrees and a half), but the direction towards which the axis tip in space.
The change in the angle of the rotation, in general, can alter the climate. In fact, the alternation of seasons depends precisely by the fact that the axis is tilted. If it were perfectly vertical, the poles would be almost always dark and cold, while the equatorial regions and tropical would receive much more solar radiation and temperatures were far superior to current ones.
So if the angle was less of the current 23.27 °, would be colder at high latitudes and warmer at the equator, instead if it was more than 23.27 °C, the poles would receive more sun and the ice caps would risk dissolution.
The fact that the angle of rotation has not changed, but only moved sideways reassures us, but not entirely if we look at the data in the recent past.
Eight of the ten strongest earthquakes of the last century have occurred in a time very limited: only 15 years.
From August 15, 1950 the aftershocks above 8.5 degrees were eight, including four of more than 9 degrees .. All have occurred in India and circumpacifica. We are therefore at the beginning of a new seismic phase that could last 15-20 years? Maybe, there are no elements to say. But if in the coming years will occur in the same way other macro earthquakes of great intensity, then one might find in the same situation of the fifties - sixties.
But what about the climate change if the Earth's axis with the earthquake in Sumatra has not changed the angle vertical?
If earthquakes grade exceeding 8 are able to move the Earth's axis, surely this has been done even during the years seismic'50-'60, which were also more strong and violent. Even in that period moving Axis has happened only horizontally and did not change the angle? We do not know, there were no instruments capable of accurately measured.
But we know with certainty that in correspondence of those years the temperature was colder than today, especially at high latitudes, with a drop of up to 0.4 ° C compared to the nowday average. After that the average temperature has risen up to the highest levels of the century in recent years. The average temperature depends on many factors: greenhouse gases, solar phases, presence of dust in the upper atmosphere due to large eruptions, inclination of the earth axis.
The cold phase of the fifties - Sixty may have been due to a combination of these factors, to which may have contributed large earthquakes. Contribution modest but noticeable.
So the recurrence of violent seismic events could have consequences on climate change, albeit in limited numbers for a short period of time. We only hope, with also the contribution of science and technology, that future earthquakes act on the earth so that this decrease its angle so as to trigger a period colder and save for a few years the polar caps, to allow our politicians to come to their senses. If the angle were to increase, the catastrophic consequences due to melting of glaciers will occur at a rate even higher than today, with damage whose enormity is unpredictable. Well, you can say that I’m crazy, but we certainly can not hope that the telluric cataclysms move the axis terrestrial in a random way, or wait for the very slow phenomena induced by continental drift, what do you think?

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