Thursday, January 9, 2025

Image of Earthquake as cracking phenomenon (3)

 As I wrote in (2), there are cracking origins of Earthquakes near the plate edges in deep area.In the deeper area of earth's crust, the higher pressure there is. So, stress of plates should go towards to shallower area. In the other hand, earthquake energy  is distributed from deeper area to shallower area. It seems to be similar with the domino from a large piece to smaller pieces.In the ends of domino, the falling domino makes stopped by the bigger pieces. Except the falling down near ground surface, most of energy should be stocked as all the accumulation including past other stacked pieces. Only it is open end, and others in deeper area are fixed end by neighborhood crust.

The loss energy by shaking near ground surface is very small because of far smaller mass than the Magnitude except tsunami with huge mass of sea water. This may be the reason why most of the biggest earthquakes wouldn't follow with Gutenberg-Richter law. The loss energy by friction between sinking continental plates around the edge may be small ratio of the total Magnitude energy. Its dynamic friction coefficient in slipping phenomenon is very small in general (If it were large, the phenomenon should be called not "slipping", but "slow slipping" without large magnitude ).  

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MD-T chart in 根室地方中部

MD-T chart in 根室地方中部 (Middle Nemuro region)