The relationships between earthquakes and positions of the sun and moon (II) |
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Institution: | (1) Center for Analysis and Prediction, State Seismological Bureau, 100036 Beijing, China;(2) Institute of Geophysics, State Seismological Bureau, 100081 Beijing, China |
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Abstract: | This paper deals with the distributive characteristics of the occurrence time of earthquakes with respect to the aftershock
sequences of strong earthquakes. The distribution of lunar and solar local hour angles at the time of commencement of moderate
and strong aftershocks indicates that the time of commencement of moderate and strong aftershocks is modulated by the positions
of the sun and moon and then the earthquake-restrained time zones exists also. In this paper the differences of earthquake-restrained
time zones between the preshock sequences and the aftershock sequences are compared, and the possible mechanism is analyzed
preliminarily. And the possible maximum scope of accuracy in predicting the occurrence time of an earthquake is determined
as well.
This paper is supported by the Eight Five Year Target of the State Seismological Bureau, China. |
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Keywords: | moderate and strong aftershock occurrence time local hour angle earthquake-restrained time zone time prediction |
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