SEISMOLOGY AND GEOLOGY ›› 2024, Vol. 46 ›› Issue (6): 1314-1331.DOI: 10.3969/j.issn.0253-4967.2024.06.006
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WANG Xin(), ZHANG Ke*(), WANG Yue
Received:
2024-01-17
Revised:
2024-04-12
Online:
2024-12-20
Published:
2025-01-22
通讯作者:
*张珂, 女, 1992年生, 硕士, 工程师, 主要从事数字地震学方面研究, E-mail: 作者简介:
王鑫, 男, 1982年生, 2010年于中国地质大学获资源勘查工程专业学士学位, 高级工程师, 主要从事地震监测业务及数字地震学相关研究工作, E-mail: wangxin0111@163.com。
基金资助:
WANG Xin, ZHANG Ke, WANG Yue. CHARACTERISTICS AND SEISMIC STRUCTURE ANALYSIS OF THE MS5.9 AND MS4.7 EARTHQUAKE SEQUENCES IN ALUKEERQIN BANNER, INNER MONGOLIA[J]. SEISMOLOGY AND GEOLOGY, 2024, 46(6): 1314-1331.
王鑫, 张珂, 王玥. 内蒙古阿鲁科尔沁旗MS5.9与MS4.7地震序列特征及其发震构造分析[J]. 地震地质, 2024, 46(6): 1314-1331.
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URL: https://www.dzdz.ac.cn/EN/10.3969/j.issn.0253-4967.2024.06.006
Fig. 1 Seismo-tectonic background of the Alukeerqinqii MS5.9 and MS4.7 earthquakes(a), epicenter location of the earthquake sequence(ML≥0.0)(b), and seismic stations of the research area(c).
层号 | 顶层深度/km | vP/km·s-1 |
---|---|---|
1 | 0 | 6.10 |
2 | 23.00 | 6.72 |
3 | 39.00 | 8.05 |
Table1 Crustal velocity model in the north region of Inner Mongolia
层号 | 顶层深度/km | vP/km·s-1 |
---|---|---|
1 | 0 | 6.10 |
2 | 23.00 | 6.72 |
3 | 39.00 | 8.05 |
Fig. 4 Epicenter location distribution(a), variation characteristics of the source depth along the latitude and longitude directions(b, c), and the distribution of the source depth after relocation(d).
序号 | 节面Ⅰ | 节面Ⅱ | P轴 | T轴 | 震源球图解 | 资料来源 | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
走向 /(°) | 倾角 /(°) | 滑动角 /(°) | 走向 /(°) | 倾角 /(°) | 滑动角 /(°) | 方位 /(°) | 仰角 /(°) | 方位 /(°) | 仰角 /(°) | |||
1 | 209 | 73 | 19 | 305 | 72 | 163 | 78 | 2 | 167 | 25 | | 内蒙古地震局 测震台网 |
2 | 202 | 56 | 174 | 296 | 85 | 34 | 64 | 20 | 165 | 27 | | USGS① |
3 | 46 | NW | 65.4 | 319.5 | NE | 70 | 267.5 | 17 | 7.5 | 52.2 | | 内蒙古地震局 地震分析预报中心 |
4 | 70 | NW | 80 | 172 | NE | 40 | 16 | 41 | 131 | 25 | | 中国地震局 地球物理研究所 |
Table2 Focal mechanism solutions of the 2003 MS5.9 Alukeerqinqi main earthquake
序号 | 节面Ⅰ | 节面Ⅱ | P轴 | T轴 | 震源球图解 | 资料来源 | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
走向 /(°) | 倾角 /(°) | 滑动角 /(°) | 走向 /(°) | 倾角 /(°) | 滑动角 /(°) | 方位 /(°) | 仰角 /(°) | 方位 /(°) | 仰角 /(°) | |||
1 | 209 | 73 | 19 | 305 | 72 | 163 | 78 | 2 | 167 | 25 | | 内蒙古地震局 测震台网 |
2 | 202 | 56 | 174 | 296 | 85 | 34 | 64 | 20 | 165 | 27 | | USGS① |
3 | 46 | NW | 65.4 | 319.5 | NE | 70 | 267.5 | 17 | 7.5 | 52.2 | | 内蒙古地震局 地震分析预报中心 |
4 | 70 | NW | 80 | 172 | NE | 40 | 16 | 41 | 131 | 25 | | 中国地震局 地球物理研究所 |
序号 | 发震时刻 | 震中位置 | 震级 /ML | 深度 /km | 节面Ⅰ | 节面Ⅱ | 震源球图解 | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
东经 /(°) | 北纬 /(°) | 走向 /(°) | 倾角 /(°) | 滑动角 /(°) | 走向 /(°) | 倾角 /(°) | 滑动角 /(°) | ||||||
1 | 2021-10-15 | 5:10:03 | 120.298 | 44.183 | 5.1 | 37 | 220 | 90 | 160 | 310 | 80 | 10 | |
2 | 2021-10-15 | 5:24:48 | 120.292 | 44.187 | 2.9 | 21 | 227 | 62 | 169 | 322 | 80 | 29 | |
3 | 2021-10-15 | 5:33:57 | 120.286 | 44.182 | 3.5 | 21 | 58 | 75 | 167 | 152 | 77 | 16 | |
4 | 2021-10-15 | 10:48:14 | 120.254 | 44.213 | 2.9 | 14 | 219 | 70 | 178 | 310 | 88 | 10 | |
5 | 2021-10-15 | 15:47:57 | 120.265 | 44.192 | 3.3 | 20 | 219 | 70 | 176 | 310 | 87 | 20 | |
6 | 2021-10-16 | 5:05:11 | 120.281 | 44.197 | 2.4 | 22 | 270 | 90 | 170 | 360 | 80 | 0 | |
7 | 2021-10-16 | 9:29:40 | 120.25 | 44.205 | 2.8 | 15 | 270 | 90 | 170 | 360 | 80 | 0 | |
8 | 2021-10-20 | 8:55:29 | 120.275 | 44.188 | 2.8 | 19 | 69 | 85 | 150 | 162 | 61 | 6 | |
9 | 2021-10-23 | 7:47:11 | 120.268 | 44.19 | 2.5 | 20 | 179 | 79 | -126 | 41 | 62 | -67 | |
10 | 2021-11-13 | 9:25:03 | 120.284 | 44.187 | 3.2 | 21 | 169 | 36 | -126 | 31 | 62 | 67 | |
11 | 2021-12-20 | 8:36:57 | 120.286 | 44.185 | 2.3 | 21 | 220 | 70 | -176 | 129 | 87 | -20 | |
Table3 Focal mechanism solutions of typical ML≥1.5 events of the 2021 MS4.7 Alukeerqinqi earthquake sequence
序号 | 发震时刻 | 震中位置 | 震级 /ML | 深度 /km | 节面Ⅰ | 节面Ⅱ | 震源球图解 | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
东经 /(°) | 北纬 /(°) | 走向 /(°) | 倾角 /(°) | 滑动角 /(°) | 走向 /(°) | 倾角 /(°) | 滑动角 /(°) | ||||||
1 | 2021-10-15 | 5:10:03 | 120.298 | 44.183 | 5.1 | 37 | 220 | 90 | 160 | 310 | 80 | 10 | |
2 | 2021-10-15 | 5:24:48 | 120.292 | 44.187 | 2.9 | 21 | 227 | 62 | 169 | 322 | 80 | 29 | |
3 | 2021-10-15 | 5:33:57 | 120.286 | 44.182 | 3.5 | 21 | 58 | 75 | 167 | 152 | 77 | 16 | |
4 | 2021-10-15 | 10:48:14 | 120.254 | 44.213 | 2.9 | 14 | 219 | 70 | 178 | 310 | 88 | 10 | |
5 | 2021-10-15 | 15:47:57 | 120.265 | 44.192 | 3.3 | 20 | 219 | 70 | 176 | 310 | 87 | 20 | |
6 | 2021-10-16 | 5:05:11 | 120.281 | 44.197 | 2.4 | 22 | 270 | 90 | 170 | 360 | 80 | 0 | |
7 | 2021-10-16 | 9:29:40 | 120.25 | 44.205 | 2.8 | 15 | 270 | 90 | 170 | 360 | 80 | 0 | |
8 | 2021-10-20 | 8:55:29 | 120.275 | 44.188 | 2.8 | 19 | 69 | 85 | 150 | 162 | 61 | 6 | |
9 | 2021-10-23 | 7:47:11 | 120.268 | 44.19 | 2.5 | 20 | 179 | 79 | -126 | 41 | 62 | -67 | |
10 | 2021-11-13 | 9:25:03 | 120.284 | 44.187 | 3.2 | 21 | 169 | 36 | -126 | 31 | 62 | 67 | |
11 | 2021-12-20 | 8:36:57 | 120.286 | 44.185 | 2.3 | 21 | 220 | 70 | -176 | 129 | 87 | -20 | |
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