Determination of focal mechanism solutions of the earthquakes with M≥4.0 occurred in the mainland of China during October 2022 to February 2023
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摘要: 利用中国地震台网记录的宽频带波形资料，采用近震全波形反演方法得到2022年10月1日—2023年2月28日发生在中国大陆地区的M≥4.0共46次地震的震源机制解以及2023年1月30日新疆沙雅M6.1地震的矩心位置和矩心偏移时间。结果显示逆断型15次，走滑型15次，正断型14次，未知型2次。Abstract: In this paper, the regional full waveform inversion using the broadband waveforms recorded by China Seismic Network were conducted, and the focal mechanism solutions of the 46 earthquakes with M≥4.0 occurred in the mainland of China from October 2022 to February 2023 were obtained. The centroid location and time shift of the M6.1 Shaya, Xinjiang earthquake were determinated by a grid search in the horizontal plane. The types of these focal mechanism solutions show 15 reverse faulting, 15 strike-slip faulting, 14 normal faulting and 2 odd earthquakes.
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Key words:
- focal mechanism /
- source parameters
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图 1 47次M≥4.0以上地震震中位置和所用台站分布
Figure 1. Map of the epicenters of the 47 earthquakes with M≥4.0 and the used stations
图 2 2022年10月—2023年2月中国大陆地区M≥4.0地震类型图解
Figure 2. The ternary diagram of the focal mechanisms in the mainland of China during October 2022 to February 2023
图 3 平面内网格搜索沙雅M6.1地震最佳震源机制解
Figure 3. The best focal mechanism solution of the Shaya M6.1 earthquake using grid search in the horizontal plane
表 1 2022年10月—2023年2月中国大陆地区M≥4.0地震基本参数
Table 1. Events list of the earthquakes with M≥4.0 in the mainland of China during October 2022 to February 2023
序号 发震时刻（BJT）
（年-月-日 时:分:秒）北纬/° 东经/° 深度/km 震级（M） 参考地名 1 2022-10-03 01:49:38.3 38.35 113.73 10 4.3 河北石家庄市平山县 2 2022-10-03 05:12:14.3 33.30 92.02 10 4.0 青海海西州唐古拉地区 3 2022-10-16 16:54:31.9 39.42 78.13 17 5.1 新疆喀什地区巴楚县 4 2022-10-16 23:02:06.2 40.17 83.15 22 4.6 新疆阿克苏地区沙雅县 5 2022-10-19 12:35:34.9 37.69 92.30 11 5.5 青海海西州茫崖市 6 2022-10-19 17:22:40.1 27.94 86.03 10 4.2 西藏日喀则市聂拉木县 7 2022-10-22 13:17:01.5 29.61 102.03 12 5.0 四川甘孜州泸定县 8 2022-10-23 22:53:20.8 37.70 77.83 17 4.8 新疆和田地区皮山县 9 2022-10-23 23:06:58.9 37.71 77.85 17 5.1 新疆和田地区皮山县 10 2022-11-01 21:48:22.4 33.11 86.75 10 4.9 西藏那曲市尼玛县 11 2022-11-02 06:06:54.4 33.18 91.96 9 4.8 青海海西州唐古拉地区 12 2022-11-02 17:13:24.8 41.68 92.70 10 4.7 新疆哈密市伊州区 13 2022-11-10 13:01:06.1 28.35 94.48 10 5.6 西藏林芝市墨脱县 14 2022-11-12 07:13:39.5 26.93 102.92 10 4.2 云南昭通市巧家县 15 2022-11-16 10:46:59.2 26.46 102.04 16 4.3 四川凉山州会理市 16 2022-11-16 11:28:16.6 44.08 130.14 600 4.5 黑龙江牡丹江市穆棱市 17 2022-11-18 19:44:18.0 41.33 83.94 15 4.3 新疆阿克苏地区库车市 18 2022-11-18 21:23:56.3 29.62 102.01 14 4.3 四川甘孜州泸定县 19 2022-11-19 01:27:34.5 23.37 102.26 8 5.0 云南红河州红河县 20 2022-11-22 12:35:50.5 36.28 77.88 80 4.2 新疆和田地区皮山县 21 2022-11-28 03:58:42.1 39.72 74.32 13 4.7 新疆克孜勒苏州乌恰县 22 2022-11-29 14:31:03.9 40.41 77.09 10 4.6 新疆克孜勒苏州阿图什市 23 2022-12-03 14:24:01.4 34.27 85.31 10 4.7 西藏阿里地区改则县 24 2022-12-10 21:47:38.3 37.76 101.26 10 4.2 青海海北州门源县 25 2022-12-12 01:51:03.3 40.57 111.14 10 4.1 内蒙古呼和浩特市土默特左旗 26 2022-12-13 08:04:02.9 43.54 89.38 15 4.7 新疆昌吉州奇台县 27 2022-12-15 07:18:23.7 29.30 105.49 8 4.0 重庆荣昌区 28 2022-12-17 22:24:10.2 37.64 77.78 20 4.2 新疆和田地区皮山县 29 2022-12-22 10:47:02.6 35.56 99.14 9 5.0 青海果洛州玛多县 30 2022-12-27 11:30:10.0 37.74 101.30 10 4.1 青海海北州门源县 31 2023-01-01 21:02:58.6 36.77 77.08 101 4.2 新疆喀什地区叶城县 32 2023-01-05 12:27:38.2 37.91 101.13 10 4.2 青海海北州祁连县 33 2023-01-14 16:02:28.2 32.92 92.22 9 4.3 青海海西州唐古拉地区 34 2023-01-26 00:02:10.4 35.83 79.89 10 4.9 新疆和田地区和田县 35 2023-01-26 03:49:43.6 29.63 102.01 11 5.6 四川甘孜州泸定县 36 2023-01-26 03:50:16.1 29.66 102.07 10 4.5 四川甘孜州泸定县 37 2023-01-26 04:57:18.7 29.65 101.98 10 4.0 四川甘孜州泸定县 38 2023-01-26 07:21:32.3 29.63 101.99 14 4.4 四川甘孜州泸定县 39 2023-01-30 07:49:39.7 40.01 82.29 50 6.1 新疆阿克苏地区沙雅县 40 2023-01-31 01:07:43.9 35.85 79.86 10 4.8 新疆和田地区和田县 41 2023-02-03 20:04:19.1 37.02 96.94 10 4.9 青海海西州德令哈市 42 2023-02-03 20:14:40.2 37.03 96.91 10 4.2 青海海西州德令哈市 43 2023-02-11 10:41:42.8 23.76 114.64 11 4.3 广东河源市源城区 44 2023-02-14 02:38:48.5 38.96 92.75 10 4.3 青海海西州茫崖市 45 2023-02-22 18:25:52.7 41.89 81.99 26 4.6 新疆阿克苏地区拜城县 46 2023-02-27 07:58:05.4 41.87 79.85 10 5.1 新疆阿克苏地区温宿县 47 2023-02-28 22:46:50.1 29.63 102.01 8 4.8 四川甘孜州泸定县 
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表 2 2022年10月—2023年2月中国大陆地区M≥4.0地震的震源机制结果
Table 2. Focal mechanisms of the earthquakes with M≥4.0 in the mainland of China
序号 发震时刻
（BJT）
（年-月-日 时:分:秒）节面Ⅰ 节面Ⅱ P 轴 T 轴 矩心
深度/km矩震级
（MW）VR CN 沙滩球 走向/° 倾角/° 滑动角/° 走向/° 倾角/° 滑动角/° 方位角/° 仰角/° 方位角/° 仰角/° 1 2022-10-03 01:49:38.3 207 89 125 298 35 2 267 35 147 36 16 4.1 0.84 1.7 
2 2022-10-03 05:12:14.3 161 81 105 282 17 33 238 34 87 52 5 4.3 0.57 5.2 
3 2022-10-16 16:54:31.9 179 44 96 350 46 84 84 1 184 85 10 4.5 0.52 2.4 
4 2022-10-16 23:02:06.2 274 75 176 5 86 15 139 8 231 14 10 4.4 0.54 2.3 
5 2022-10-19 12:35:34.9 125 66 123 247 40 39 192 15 79 56 11 5.2 0.61 2.4 
6 2022-10-19 17:22:40.1 55 83 −84 194 9 −131 332 51 140 38 11 4.7 0.58 6.8 
7 2022-10-22 13:17:01.5 299 37 −139 174 67 −61 125 58 243 17 6 5.0 0.80 3.0 
8 2022-10-23 22:53:20.8 287 65 84 121 26 103 21 20 185 69 14 4.5 0.70 2.3 
9 2022-10-23 23:06:58.9 256 36 57 115 61 112 189 13 66 67 12 5.0 0.66 2.1 
10 2022-11-01 21:48:22.4 16 29 −85 190 61 −93 92 74 282 16 6 5.0 0.59 3.0 
11 2022-11-02 06:06:54.4 144 64 −174 51 84 −26 4 22 100 14 5 5.0 0.61 3.1 
12 2022-11-02 17:13:24.8 172 53 91 350 37 89 261 8 87 82 9 4.5 0.63 2.7 
13 2022-11-10 13:01:06.1 89 72 87 278 18 98 181 27 355 63 17 5.6 0.83 2.9 
14 2022-11-12 07:13:39.5 88 88 −164 358 74 −2 314 13 222 10 5 4.4 0.80 3.4 
15 2022-11-16 10:46:59.2 121 88 −139 30 49 −3 354 29 248 26 6 4.4 0.87 2.6 
16 2022-11-16 11:28:16.6 62 42 172 158 84 48 280 27 32 37 570 4.4 0.86 8.2 
17 2022-11-18 19:44:18.0 173 80 170 265 80 10 219 0 129 14 15 4.3 0.61 2.3 
18 2022-11-18 21:23:56.3 296 38 −137 170 66 −60 122 58 239 15 7 4.5 0.78 1.9 
19 2022-11-19 01:27:34.5 33 66 12 298 79 156 347 9 253 25 5 5.1 0.88 2.8 
20 2022-11-28 03:58:42.1 106 33 86 291 57 92 19 12 208 78 12 4.9 0.81 3.8 
21 2022-11-29 14:31:03.9 72 75 67 311 27 146 180 27 313 54 26 4.2 0.54 2.5 
22 2022-12-03 14:24:01.4 326 89 −178 235 88 −1 191 2 100 1 5 4.9 0.75 2.5 
23 2022-12-10 21:47:38.3 182 89 −163 92 73 −2 48 13 316 11 9 4.3 0.58 1.8 
24 2022-12-12 01:51:03.3 226 65 −119 99 38 −44 94 59 337 15 14 4.1 0.75 1.9 
25 2022-12-13 08:04:02.9 279 49 74 122 43 107 20 3 125 78 20 4.7 0.65 2.5 
26 2022-12-15 07:18:23.7 189 63 84 21 28 101 283 18 86 71 4 4.2 0.90 2.2 
27 2022-12-17 22:24:10.2 114 70 87 304 20 99 207 25 19 65 24 4.2 0.54 2.0 
28 2022-12-22 10:47:02.6 179 88 −175 89 85 −2 44 5 314 2 13 4.9 0.91 1.8 
29 2022-12-27 11:30:10.0 354 84 170 85 80 7 39 2 309 11 17 4.4 0.54 2.0 
30 2023-01-01 21:02:58.6 316 71 −56 72 39 −148 266 52 22 19 90 4.3 0.61 3.2 
31 2023-01-05 12:27:38.2 211 73 160 307 71 18 259 1 168 26 8 4.4 0.67 2.8 
32 2023-01-14 16:02:28.2 245 69 −155 145 67 −23 105 32 15 1 11 4.5 0.56 3.1 
33 2023-01-26 00:02:10.4 7 57 −124 238 46 −50 221 61 120 6 10 5.0 0.72 2.2 
34 2023-01-26 03:49:43.6 13 29 −63 163 64 −104 45 68 263 18 7 5.4 0.83 2.1 
35 2023-01-26 03:50:16.1 302 40 −76 104 52 −102 326 79 202 6 5 4.6 0.31 4.1 
36 2023-01-26 04:57:18.7 284 41 −138 160 64 −57 116 57 227 13 5 4.3 0.80 1.7 
37 2023-01-26 07:21:32.3 307 32 −128 170 66 −69 114 63 244 18 4 4.7 0.80 2.6 
38 2023-01-30 07:49:39.7 161 76 157 257 68 15 210 6 118 26 30 5.8 0.64 1.8 
39 2023-01-31 01:07:43.9 6 57 −111 222 39 −61 228 70 111 9 9 4.9 0.69 2.2 
40 2023-02-03 20:04:19.1 89 37 84 276 54 94 3 9 204 81 13 5.1 0.86 1.8 
41 2023-02-03 20:14:40.2 93 37 87 276 53 92 5 8 197 82 13 4.5 0.84 1.8 
42 2023-02-11 10:41:42.8 335 63 −62 105 38 −133 289 61 45 14 13 4.0 0.87 1.8 
43 2023-02-14 02:38:48.5 284 72 −33 26 59 −159 241 36 337 8 19 4.3 0.60 2.7 
44 2023-02-22 18:25:52.7 100 49 87 285 41 94 193 4 342 85 10 4.7 0.62 3.9 
45 2023-02-27 07:58:05.4 243 58 −11 339 81 −147 206 29 107 15 16 4.7 0.64 2.3 
46 2023-02-28 22:46:50.1 340 28 −90 160 62 −90 70 73 250 17 7 5.0 0.78 2.3 
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