It is true that earthquakes are natural or geophysical phenomena have a devastating effect on the areas where they occur, and increasingly occurring phenomena of this nature with high intensities have caused the death and disappearance of human lives, not counting clear, with the substantial costs that cause damage.
But though we can not imagine, not only are the only impact of the earthquakes, it has been shown that they can also have an impact on global warming of our planet Earth with the release to the atmosphere of greenhouse gases, but it may ask how did this happen?
Before you start to explain about it I must state that not all earthquakes have an impact on global warming, this is due mostly to the presence of the "submarine earthquakes" in certain areas of the oceanic crust occur. According to our friends in the journal "Nature Geoscience" published an article about a study which indicates "... that earthquakes could contribute to global warming through the release of greenhouse gases as a major earthquake in 1945 released more than seven million cubic meters of methane on the Arabian Sea ... " Source: http://www.analitica.com/medioambiente/5624333.asp
Methane Hydrate
You may ask me what is that of methane in the sea. It's been quite a while ago I can remember in a special Discovery Channel presented a report on the future of fuel and what could be the main sources of energy that man can use when oil runs out, one of which hydrates methane, which are found in great abundance in icy structures in the subsoil of the continental shelves surrounding land masses of the Earth, calculated that methane hydrates contain between 1,000 and 5,000 gigatonnes of carbon, rather than the total amount is issued each year by the burning of fossil fuels.
And why say that earthquakes contribute to the Global Warming? In 1945 was released more than seven million cubic meters of methane on the Arabian Sea due to an earthquake in that area with a magnitude of 8.1 degrees, pointing to the discovery of a source of greenhouse gases previously unknown . You have to remember to those skilled in the art that the methane is more dangerous and potent than carbon dioxide.
As indicated by the study director, David Fischer, "... according to several indicators, we argue that the earthquake led to the fracture of the sediments, allowing the release of gas that was trapped under ..." Source: http://www.analitica.com/medioambiente/5624333.asp
In conclusion, we can say that all earthquakes that occur on the planet, have a positive effect on global warming of the Earth, as only in areas where these "reservoirs" of methane hydrates should have more observation, and recur if another phenomenon of this nature the maximum permitted level of warming would increase, would have to do research on the return periods of these earthquakes occurring in areas where methane hydrates located to analyze what precautions should be taken in the case.
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