The centroid moment tensor solution of 2022 Luding MS6.8 earthquake in Sichuan Province
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图 1 泸定地震矩张量
红色圆圈：鲜水河断裂带1725年以来7.0级以上地震震中分布；青绿色三角形：矩张量反演所用台站分布；红色震源球：泸定地震震源机制解
Figure 1. Focal mechanism of Luding earthquake
图 2 2022年9月5日四川泸定MS6.8地震的矩张量解在Hudson震源类型图上的投影
红色震源球为最优解，黑色震源球为10%最优采样解集，其他采样解以点表示DC—双力偶；+Crack—张裂缝；−Crack—闭合裂缝；+Isotropic—爆炸；−Isotropic—塌陷；±CLVD—错动方向相反补偿线性失量偶极子；±Dipole—错动方向相反的偶极子
Figure 2. Projection of Luding earthquake moment tensor solution on Hudson source type map
图 3 2022年9月5日四川泸定MS6.8地震的矩心位置
符号显示最佳的双力偶解；红色为低失配误差，蓝色为高失配误差
Figure 3. Earthquake moment tensor location of Luding earthquake
图 4 2022年9月5日四川泸定MS6.8地震部分台站波形拟合情况
黑色为实际观测波形，红色为理论计算波形。图中标注信息从上到下依次为台站名、震中距、方位角、权重、拟合误差及时间窗
Figure 4. Fits waveform best ensemble of different station
表 1 2022年9月5日四川泸定MS6.8地震矩张量
Table 1. Moment tensor solution of Luding MS6.8 earthquake
MW Mnn Mee Mdd Mne Mnd Med ISO CLVD 6.68 0.496 −0.409 0.05 0.823 0.1 −0.32 0.043 −0.19 
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