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Russian Geology and Geophysics

2007 year, number 8

A macroseismic equation with a convergent solution

V.A. Potapov†, E.A. Chernov
Institute of the Earth's Crust, Siberian Branch of the RAS, 128 ul. Lermontova, Irkutsk, 664033, Russia
Keywords: Shaking intensity; earthquake effects; kinematic parameters of ground motion
Pages: 683-688


We obtained a macroseismic equation with a convergent solution at a hypocentral distance D ~ 0 (independent of magnitude) for relative shaking intensity. The logarithmic distance dependence of intensity turned out to be piecewise linear no matter whether it is expressed in relative units of intensity degree or in logarithmic ground motion velocity. The macroseismic intensity shows high correlation with motion velocity. Another result is the magnitude dependence of dominant periods of ground motion velocity for large earthquakes.