图1 新疆于田M7.3级地震震源机制解
采用下半球投影,同时给出了点源模型的P波垂向位移理论图(红线)与资料(黑线)的拟合情况。图形下方给出了两组节面解(左下,λ,δ,θ,h分别表示错动倾伏角、断层倾角、断层走向、震源深度)和点源模型的震源时间函数(右下)。
Fig.1 Focal mechanism of the M7.3 earthquake, Yutian, Xinjiang, China
Lower-hemisphere projection is used here. The observed P wave records (black line) and the synthetic seismogram (red line) based on the simple point model are compared. The parameters of two possible fault planes are listed also, with l, d, q ,h indicating the rake angle, dip angle, strike direction and source depth respectively. The obtained source time function are plotted.
图2 有限断层模型的远场P和SH波形拟合
左列为P波垂向位移理论图(红线)与记录(黑线)的对比;右列为SH波切向位移理论图(红线)与记录(黑线)的对比;并给出每个记录的方位角(左上)、震中距(左下)、振幅比(上)和台站名(右)。
Fig.2 Comparison of the observed teleseismic P and SH records with the synthetic waveforms
Comparison of observed (black) and synthetic waveforms (red) for P vertical components, and SH components are shown in the panel, the azimuth, epicentral distance, amplitude ratio and station name are also indicated.
图3 地震断层面上滑动分布
图中分别给出了有限断层模型的地表投影(左上)和三维示意图(右上)
Fig.3 Inverted slip distribution on the fault
Surface projection of fault model ( up-left ) and 3D view of the fault model ( up-right ) are shown
图4 地震断层滑动分布投影
Fig. 4 The map shows the projection of slip distribution on the ground
图5 根据破裂过程模型计算的理论烈度分布
Fig.5 Predicted Shakemap calculated from slip model