Study on Characteristic of Group Activity of Three Sets of Medium-Strong Earthquakes in the North Area of North China
Zhao Ai-ping
Abstract
Zhao Ai-ping
Abstract
The medium-strong earthquake activity in the north area of the North China has been appeared active trend,which is showed by group activity characteristic of three sets of medium-strong earthquakes since the Apr.6,1976 Helinger earthquake of M6.4.Time and spatial characteristic and migration law of these sets of medium-strong earthquakes are introduced.It is pointed out that this research is significant for heightening earthquake prediction level for the north area of North China.
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The medium-strong earthquake activity in the north area of the North China has been appeared active trend,which is showed by group activity characteristic of three sets of medium-strong earthquakes since the Apr.6,1976 Helinger earthquake of M6.4.Time and spatial characteristic and migration law of these sets of medium-strong earthquakes are introduced.It is pointed out that this research is significant for heightening earthquake prediction level for the north area of North China.
Key concepts: China, Seismology, Geology, Group (periodic table), Earthquake prediction, Geography, Archaeology, Physics