Determination of the focal mechanism solutions of the earthquakes with MS≥4.0 occurred in the mainland of China during April to June 2022
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摘要: 本文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4月1日—6月30日发生在中国大陆地区的MS≥4.0共24次地震的震源机制解。结果显示逆断型5次,走滑型17次,正断型2次。Abstract: In this paper, the regional full waveform inversion of the broadband waveforms from China Seismic Network were conducted, and the focal mechanism solutions of the 24 earthquakes with MS≥4.0 in the mainland of China from April 1 to June 30, 2022 were obtained. The types of these focal mechanism solutions show 5 reverse faulting, 17 strike-slip faulting and 2 normal faulting.
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Key words:
- focal mechanism /
- source parameters
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表 1 2022年4—6月中国大陆地区MS≥4.0地震基本参数
Table 1. Events list of the earthquakes with MS≥4.0 in the mainland of China during April to June 2022
序号 发震时刻(BJT) 北纬
/°东经
/°深度
/km震级(MS) 参考地名 1 2022-04-06 07:50:05.3 28.22 105.03 10 5.1 四川宜宾市兴文县 2 2022-04-06 12:54:04.3 37.68 76.03 118 4.1 新疆喀什地区塔什库尔干县 3 2022-04-07 05:54:49.7 28.12 105.15 8 4.1 四川宜宾市兴文县 4 2022-04-15 09:26:14.3 38.52 97.33 10 5.4 青海海西州德令哈市 5 2022-04-16 08:32:13.7 27.78 100.62 9 4.6 云南丽江市宁蒗县 6 2022-04-17 00:18:37.0 27.75 100.61 8 4.1 云南丽江市宁蒗县 7 2022-04-30 01:23:47.3 27.77 100.63 8 4.2 云南丽江市宁蒗县 8 2022-05-05 12:02:09.7 40.75 105.63 10 4.0 内蒙古阿拉善盟阿拉善左旗 9 2022-05-08 19:59:47.7 31.89 104.46 8 4.1 四川绵阳市北川县 10 2022-05-20 08:36:36.7 29.67 102.48 20 4.8 四川雅安市汉源县 11 2022-05-26 15:48:46.7 32.25 91.89 10 4.8 西藏那曲市安多县 12 2022-06-01 17:00:08.4 30.37 102.94 17 6.1 四川雅安市芦山县 13 2022-06-01 17:03:09.4 30.37 102.92 18 4.5 四川雅安市宝兴县 14 2022-06-08 14:52:24.6 36.09 77.78 10 5.0 新疆和田地区皮山县 15 2022-06-10 00:03:24.4 32.27 101.82 10 5.8 四川阿坝州马尔康市 16 2022-06-10 00:06:44.8 32.26 101.79 10 4.1 四川阿坝州马尔康市 17 2022-06-10 00:21:17.4 32.28 101.79 10 4.4 四川阿坝州马尔康市 18 2022-06-10 01:28:34.0 32.25 101.82 13 6.0 四川阿坝州马尔康市 19 2022-06-10 03:27:00.0 32.24 101.85 15 5.2 四川阿坝州马尔康市 20 2022-06-10 04:37:26.8 32.23 101.84 12 4.4 四川阿坝州马尔康市 21 2022-06-13 06:31:02.9 35.59 84.09 13 4.4 新疆和田地区民丰县 22 2022-06-14 18:11:10.0 32.25 101.79 11 4.4 四川阿坝州马尔康市 23 2022-06-17 03:19:08.3 42.48 87.99 22 4.7 新疆巴音郭楞州和硕县 24 2022-06-20 06:40:52.6 27.21 103.75 12 4.4 贵州毕节市威宁县 25 2022-06-24 02:27:37.8 41.73 90.67 25 5.1 新疆吐鲁番市鄯善县 表 2 2022年4—6月中国大陆地区MS≥4.0地震的震源机制结果
Table 2. Focal mechanisms of the earthquakes with MS≥4.0 in the mainland of China during April to June 2022
序号 发震时刻
(BJT)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 2022-04-06 07:50:05.3 300 70 −84 104 21 −106 220 64 26 25 4 4.6 0.92 4.1 2 2022-04-06 12:54:04.3 214 52 139 332 59 46 91 4 186 53 140 4.1 0.50 2.1 3 2022-04-07 05:54:49.7 156 39 60 12 57 112 87 9 331 69 4 4.3 0.77 4.0 4 2022-04-15 09:26:14.3 93 59 10 357 81 149 49 15 311 28 12 5.0 0.75 2.2 5 2022-04-16 08:32:13.7 90 87 171 180 81 3 135 4 45 8 5 4.7 0.92 2.5 6 2022-04-17 00:18:37.0 93 83 173 183 83 7 318 0 58 10 6 4.4 0.90 2.1 7 2022-04-30 01:23:47.3 88 76 168 181 79 15 314 2 45 18 8 4.7 0.77 2.3 8 2022-05-05 12:02:09.7 171 89 −168 81 78 −1 36 9 305 8 7 4.2 0.61 2.4 9 2022-05-08 19:59:47.7 354 89 −99 257 9 −7 255 45 93 43 13 4.3 0.76 2.7 10 2022-05-20 08:36:36.7 239 81 −165 147 76 −9 104 17 12 4 11 4.6 0.83 1.5 11 2022-05-26 15:48:46.7 137 87 175 227 85 3 182 1 92 6 6 5.0 0.79 2.7 12 2022-06-01 17:00:08.4 227 40 113 18 54 72 121 7 237 74 12 5.8 0.83 1.8 13 2022-06-08 14:52:24.6 253 74 −30 352 61 −162 209 32 305 9 10 4.8 0.78 2.8 14 2022-06-10 00:03:24.4 57 86 −170 326 80 −4 282 10 191 4 8 5.6 0.78 2.7 15 2022-06-10 00:06:44.8 54 77 −172 322 82 −13 278 15 9 4 6 4.6 0.5 2.2 16 2022-06-10 00:21:17.4 59 68 −168 325 79 −22 280 24 13 7 5 4.7 0.72 2.3 17 2022-06-10 01:28:34.0 59 90 −176 329 86 0 284 3 194 3 8 5.9 0.84 1.7 18 2022-06-10 03:27:00.0 65 90 173 155 83 0 111 5 20 5 8 5.2 0.7 2.6 19 2022-06-10 04:37:26.8 74 71 −149 333 60 −22 297 35 202 7 5 4.6 0.76 1.6 20 2022-06-13 06:31:02.9 342 75 164 76 74 15 29 1 299 22 7 4.7 0.83 3.3 21 2022-06-14 18:11:10.0 58 68 −163 321 74 −23 278 27 10 4 5 4.5 0.85 2.6 22 2022-06-17 03:19:08.3 297 39 81 129 52 97 213 7 75 81 21 4.4 0.6 2.6 23 2022-06-20 06:40:52.6 74 71 −163 338 74 −19 295 25 26 2 10 4.5 0.85 2.1 24 2022-06-24 02:27:37.8 177 58 69 33 38 119 282 11 42 69 21 4.5 0.52 2.4 -
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