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American researchers spoke about the unusual properties of powerful earthquakes in southern California, which occurred on the fourth and fifth of July 2019. According to scientists, they have created a complex network of faults that make the seismic hazard in the region more unpredictable. Writes about this edition of Live Science.
According to scientists, the probability that after one strong earthquake will hit another, more powerful, is only five percent. It happened in a sparsely populated area, which is located 196 kilometers from Los Angeles. On 4 July there were recorded earthquakes with magnitude of 6.4, followed by a few weaker. Through the day, fifth of July, there was a new earthquake of magnitude of 7.1, which was 11 times more powerful than the previous one.
A network of cracks, or fault zone, where there were tremors, situated on the North-American plate, which collides with the Pacific plate. There are many breaks, many of which lie at a depth unknown to scientists. They cross each other at different angles. Geologists report that the first earthquake caused the displacement of rocks along two perpendicular faults, which is very unusual.
According to Michelle cook (Michele Cooke), a geologist from the University of Massachusetts, a complex network of changes makes it difficult to forecast the future of seismic activity that could affect a larger area. In addition, the new earthquakes begin to occur not the fault of San Andreas, and Vostochnoevropeiskoi zone shift.
Video, photo All from Russia.