• The major earthquakes in California

  • American geophysicists have determined the cause of the four major earthquakes that occurred in the early twentieth century in southern California. The study is published in the Bulletin of the Seismological Society of America, and briefly about it, reports Scientific American.

    The reason for four of the five major earthquakes, according to scientists, was the anthropogenic factor. To such conclusion psychologists have come to discover that active oil and gas valley Los Angeles occurred in the vicinity of the areas where there had been fluctuations in the earth's surface.

    The strongest tremors recorded in 1933 to the South-East of the city of long beach in the valley of Los Angeles, had a magnitude of 6.4 and resulted in the deaths of over 120 people.

    Geophysics note that the induced (man-made) earthquake in California occurred as a result of direct extraction of oil and gas from underground sources, not, as, for example, in Oklahoma, as a result of using hydraulic fracturing.


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