1.防灾科技学院地球科学学院,河北 三河 065201
2.河北省地震动力学重点实验室,河北 三河 065201
3.江苏省地震局,江苏 南京210014
黄少华(1998—),男,硕士研究生。主要从事震源机制、应力场反演等方面的研究。E-mail: 1961921173@qq.com
万永革(1967—),男,研究员。主要从事构造应力场、地震应力触发等方面的研究。E-mail: wanyg217217@vip.sina.com
收稿:2022-09-22,
修回:2022-11-19,
纸质出版:2023-12-15
移动端阅览
黄少华,万永革,孙业君等.2021年江苏盐城海域MS5.3地震震源机制中心解及基于震源机制的区域应力场反演[J].防灾减灾工程学报,2023,43(06):1266-1274.
HUANG Shaohua,WAN Yongge,SUN Yejun,et al.Central Focal Mechanism of 2021 MS5.3 Yancheng Offshore Earthquake and Regional Stress Field Based on Multiple Earthquakes’Focal Mechanisms[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(06):1266-1274.
黄少华,万永革,孙业君等.2021年江苏盐城海域MS5.3地震震源机制中心解及基于震源机制的区域应力场反演[J].防灾减灾工程学报,2023,43(06):1266-1274. DOI: 10.13409/j.cnki.jdpme.20220922002.
HUANG Shaohua,WAN Yongge,SUN Yejun,et al.Central Focal Mechanism of 2021 MS5.3 Yancheng Offshore Earthquake and Regional Stress Field Based on Multiple Earthquakes’Focal Mechanisms[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(06):1266-1274. DOI: 10.13409/j.cnki.jdpme.20220922002.
2021年11月17日江苏盐城近海区域发生
M
S
5.3地震,该地震的发震机制及其原因引起地球科学家的广泛关注,为分析地震发生的原因,本次地震的震源机制解和区域应力场的精确确定是必要的。本研究综合多种机构的震源机制解数据确定了可信的震源机制中心解。为保证震源区域应力场求解的精度,本文搜集了地震周围2016年以前的历史震源机制解数据,并利用地震观测报告,得到22个2016年之后地震的震源机制解,使用结合后的震源机制解数据求解了江苏盐城海域
M
S
5.3地震周围的应力场。最终结果为:江苏盐城海域
M
S
5.3地震的震源机制中心解节面I走向104.95°,倾角70.91°,滑动角26.45°,节面II走向5.70°,倾角65.11°,滑动角158.86°;研究区域的主压应力呈ENE‑WSW向分布,主张应力呈NWN‑SES向分布。将应力场投影到震源机制中心解节面上,发现两个节面均处于相对剪应力很高的水平,说明此次地震是在构造应力场作用下发生在剪应力最大释放节面上的地震,是应力积累后的一次正常释放,周边再次发生大地震的可能性减小。考虑到应力场投影到节面II的相对剪切应力较节面I大,并且节面II与苏北—滨海断裂走向更为接近,确定节面II为本次地震的发震断层面。
On November 17, 2021, an
M
S
5.3 earthquake occurred in the offshore area of Yancheng, Jiangsu Province, China. The seismogenic mechanism and its causes have attracted extensive attention of earth scientists. To analyze the causes of the earthquake, it is necessary to accurately determine the focal mechanism solution of the earthquake and the regional stress field. In this study, a credible central focal mechanism solution was determined by synthesizing the focal mechanisms of various institutions. To ensure the accuracy of solving the stress field in the source region, this study collects the historical source mechanism solution data around the earthquake before 2016, and uses the earthquake observation report to obtain 22 source mechanism solutions after 2016. The combined source mechanism solution data is used to solve the stress field around the
M
S
5.3 earthquake in Yancheng Sea, Jiangsu Province. The final results are as follows: the central focal mechanism of MS5.3 earthquake in Yancheng Sea area of Jiangsu Province plane I strike angle is 104.95°, dip angle is 70.91°, slip angle is 26.45°, plane II strike angle is 5.70°, dip angle is 65.11°, slip angle is 158.86°; The predominant direction of main compressive stress in this area is ENE-WSW, and the dominant direction of stress is NWN-SES. Projecting the stress field onto the central focal mechanism's planes, both of planes are at a high level of relative shear stress, indicating that the earthquake occurred at the maximum shear stress release plane under the action of the tectonic stress field. It is a normal release after stress accumulation, and the possibility of a large earthquake occurring around is reduced. Considering that the relative shear stress projected by the stress field to Ilane II is larger than that of Plane I, and Plane II is closer to the strike of the Subei-Binhai fault, it is determined that the plane II is the seismogenic fault plane of this earthquake.
陈建文 , 龚建明 , 李刚 , 等 . 南黄海盆地海相中—古生界油气资源潜力巨大 [J]. 海洋地质前沿 , 2016 , 32 ( 1 ): 1 - 7 .
Chen J W , Gong J M , Li G , et al . Great resources potential of the marine Mesozoic-paleozoic in the South Yellow Sea basin [J]. Marine Geology Frontiers , 2016 , 32 ( 1 ): 1 - 7 . (in Chinese)
雷宝华 , 陈建文 , 梁杰 , 等 . 印支运动以来南黄海盆地的构造变形与演化 [J]. 海洋地质与第四纪地质 , 2018 , 38 ( 3 ): 45 - 54 .
Lei B H , Chen J W , Liang J , et al . Tectonic deformation and evolution of the South Yellow Sea basin since Indosinian movement [J]. Marine Geology &.Quaternary Geology , 2018 , 38 ( 3 ): 45 - 54 . (in Chinese)
侯方辉 , 张志珣 , 李三忠 , 等 . 南黄海新构造运动 [J]. 海洋地质动态 , 2005 , 21 ( 11 ): 15-17, 4 - 5 .
Hou F H , Zhang Z X , Li S Z , et al . Brief discussion on neotectonic movement of the South Yellow Sea [J]. Marine Ceology Letters , 2005 , 21 ( 11 ): 15 - 17 , 4 - 5 . (in Chinese)
Sungbae K , Suh M , 武雪山 , 等 . 南黄海盆地底辟构造的地球物理特征 [J]. 地球物理学进展 , 2021 , 36 ( 6 ): 2738 - 2750 .
Sungbae K , Suh M , Wu X S , et al . Geophysical characterization of diapiric structures of the South Yellow Sea Basin [J]. Progress in Geophysics , 2021 , 36 ( 6 ): 2738 - 2750 . (in Chinese)
周文杰 , 雷蕾 , 周健 , 等 . 2021年11月17日江苏大丰海域 M S 5.0地震震源深度对比分析 [J]. 地震科学进展 , 2022 , 52 ( 8 ): 361 - 366 .
Zhou W J , Lei L , Zhou J , et al . Comparative analysis of focal depth of M S 5.0 earthquake in Dafeng sea area of Jiangsu Province on November 17, 2021 [J]. Progress in Earthquake Sciences , 2022 , 52 ( 8 ): 361 - 366 . (in Chinese)
杜航 , 郑江蓉 , 江昊琳 , 等 . 利用FOCMEC和CAP方法反演2021年大丰海域 M 5.0及天宁 M 4.2地震震源机制解 [J]. 防灾减灾工程学报 , 2022 , 42 ( 4 ): 874 - 880 .
Du H , Zheng J R , Jiang H L , et al . Inversion for the focal mechanisms of the 2021 Dafeng Sea M 5.0 earthquake and Tianning M 4.2 earthquake using FOCMEC and CAP methods [J]. Journal of Disaster Prevention and Mitigation Engineering , 2022 , 42 ( 4 ): 874 - 880 . (in Chinese)
田优平 , 唐红亮 , 康承旭 , 等 . 综合震源机制解法反演湖南地区构造应力场的初步结果 [J]. 地球物理学报 , 2020 , 63 ( 11 ): 4080 - 4096 .
Tian Y P , Tang H L , Kang C X , et al . Preliminary results of inversion of tectonic stress field in Hunan regionby the composite focal mechanism method [J]. Chinese Journal of Geophysics , 2020 , 63 ( 11 ): 4080 - 4096 . (in Chinese)
许忠淮 , 吴少武 . 南黄海和东海地区现代构造应力场特征的研究 [J]. 地球物理学报 , 1997 , 40 ( 6 ): 773 - 781 .
Xu Z H , Wu S W , et al . A study on present-day tectonic stress in the southern Yellow Sea and east China sea region [J]. Acta Geophysica Sinica , 1997 , 40 ( 6 ): 773 - 781 . (in Chinese)
徐映深 , 李端璐 , 丁政 , 等 . 南黄海6.2级地震构造背景的初步探讨 [J]. 地震学刊 , 1985 , 5 ( 1 ): 93 - 97 .
Xu Y S , Li D L , Ding Z , et al . Preliminary discussion on the tectonic background of the 6.2 magnitude earthquake in the South Yellow Sea [J]. Journal of Seismology , 1985 , 5 ( 1 ): 93 - 97 . (in Chinese)
李迎春 , 李锋 , 王俊菲 , 等 . 2019年黄海 M L 4.6地震序列的震源机制和发震构造 [J]. 地震学报 , 2020 , 42 ( 5 ): 543 - 551,507 .
Li Y C , Li F , Wang J F , et al . Focal mechanism and seismogenic structure of the 2019 Yellow Sea M L 4.6 earthquake sequence [J]. Acta Seismologica Sinica , 2020 , 42 ( 5 ): 543 - 551,507 . (in Chinese)
万永革 . 同一地震多个震源机制中心解的确定 [J]. 地球物理学报 , 2019 , 62 ( 12 ): 4718 - 4728 .
Wan Y G . Determination of center of several focal mechanisms of the same earthquake [J]. Chinese Journal of Geophysics , 2019 , 62 ( 12 ): 4718 - 4728 . (in Chinese)
冯淦 , 万永革 , 许鑫 , 等 . 2021年青海玛多 M S 7.4地震对周围地区的应力影响 [J]. 地球物理学报 , 2021 , 64 ( 12 ): 4562 - 4571 .
Feng G , Wan Y G , Xu X , et al . Static stress influence of the 2021 M S 7.4 Madoi,Qinghai earthquake on neighboring areas [J]. Chinese Journal of Geophysics , 2021 , 64 ( 12 ): 4562 - 4571 . (in Chinese)
余占洋 , 沈旭章 , 梁浩 , 等 . 基于地震活动性和震源机制解研究渭河—运城盆地主要断裂带的特征及应力场分布 [J]. 地震地质 , 2022 , 44 ( 2 ): 395 - 413 .
Yu Z Y , Shen X Z , Liang H , et al . The characteristics of major faults and stress field in Weihe—Yuncheng basin constrained by seismic activity and focal mechanism solutions [J]. Seismology And Geology , 2022 , 44 ( 2 ): 395 - 413 . (in Chinese)
孙业君 , 黄耘 , 刘泽民 , 等 . 日本 M W 9.0地震前后郯庐断裂带中南段构造应力场动态变化特征 [J]. 地球物理学报 , 2022 , 65 ( 6 ): 2124 - 2136 .
Sun Y J , Huang Y , Liu Z M , et al . Dynamic variation characteristics of tectonic stress field in the middle-southern segment of Tan-Lu fault zone before and after the 2011 Tohoku-Oki M W 9.0 earthquake [J]. Chinese Journal of Geophysics , 2022 , 65 ( 6 ): 2124 - 2136 . (in Chinese)
余海琳 , 万永革 , 黄少华 , 等 . 利用P波初动数据研究2021年云南漾濞 M S 6.4地震序列震源机制解及应力场 [J]. 地震研究 , 2021 , 44 ( 3 ): 338 - 347 .
Yu H L , Wan Y G , Huang S H , et al . Study on focal mechanism solution and stress field of the 2021 Yangbi, Yunnan M S 6.4 earthquake sequence using P-wave first motion data [J]. Journal of Seismological Research , 2021 , 44 ( 3 ): 338 - 347 . (in Chinese)
Byerly P . The earthquake of July 6,1934: Amplitude and first motion [J]. Bulletin of The Seismological Society of America , 1938 , 128 : 1 ‑ 22 .
Hodgon J H , Storey R S . Table extending Byerly &.fault - plane techniques to earthquakes of any focal depth [J]. Bulletin of the Seismological Society of America , 1953 , 43 ( 1 ) : 49 ‑ 61
郭增建 . 由地震波初动求断层面方法的一些推广和改进 [J]. 地球物理学报 , 1958 , 7 ( 1 ): 20 - 30 .
Guo Z J . Some generalization and improvement of the method of finding the fault level by the initial movement of seismic waves [J]. Acta Geophysica Sinica , 1958 , 7 ( 1 ): 20 - 30 . (in Chinese)
万永革 , 许鑫 , 黄少华 , 等 . P波极性资料确定的2022青海门源 M S 6.9地震序列震源机制及应力场 [J]. 地震工程学报 , 2022 , 44 ( 3 ): 670 - 679,690 .
Wan Y G , Xu X , Huang S H , et al . Focal mechanisms and stress field of the 2022 Menyuan,Qinghai M S 6.9 earthquake sequence determined by P-wave polarity data [J]. China Earthquake Engineering Journal , 2022 , 44 ( 3 ): 670 - 679,690 . (in Chinese)
万永革 . 震源机制水平应变花面应变的地震震源机制分类方法及序列震源机制总体特征分析 [J/OL]. 地球科学 : 1 - 16 [ 2022-09-05 ]. http://kns.cnki.net/kcms/detail/42.1874.p.20220715.1532.014.html http://kns.cnki.net/kcms/detail/42.1874.p.20220715.1532.014.html
Wan Y G . Focal mechanism classification based on areal strain of the horizontal strain rosette of focal mechanism and characteristic analysis of overall focal mechanism of the earthquake sequence [J/OL]. Earth Science : 1 - 16 [ 2022-09-05 ]. http:∥kns.cnki.net/kcms/detail/42.1874.p.20220715.1532.014.html. http://kns.cnki.net/kcms/detail/42.1874.p.20220715.1532.014.html. (in Chinese)
Wan Y G , Sheng S Z , Huang J C , et al . The grid search algorithm of tectonic stress tensor based on focal mechanism data and its application in the Boundary Zone of China, Vietnam and Laos [J]. Journal of Earth Science , 2016 , 27 ( 5 ): 777 - 785 .
Wan Y G . Contemporary tectonic stress field in China [J]. Earthquake Science , 2010 , 23 ( 4 ): 377 - 386 .
崔敏 , 张功成 , 王鹏 , 等 . 苏北—南黄海盆地NW向断层特征及形成机制 [J]. 中国矿业大学学报 , 2017 , 46 ( 6 ): 1332 - 1339 .
Cui M , Zhang G C , Wang P , et al . Characteristics and genetic mechanism of NW faults in North Jiangsu and South Yellow Sea basin [J]. Journal of China University of Mining &.Technology , 2017 , 46 ( 6 ): 1332 - 1339 . (in Chinese)
Wang M , Shen Z K . Present‑day crustal deformation of continental China derived from GPS and its tectonic implications [J]. Journal of Geophysical Research: Solid Earth , 2020 , 125 ( 2 ): 1 - 22 .
万永革 . 震源机制与应力体系关系模拟研究 [J]. 地球物理学报 , 2020 , 63 ( 6 ): 2281 - 2296 .
Wan Y G . Simulation on relationship between stress regimes and focal mechanisms of earthquakes [J]. Chinese Journal of Geophysics , 2020 , 63 ( 6 ): 2281 - 2296 . (in Chinese)
0
浏览量
0
下载量
0
CSCD
关联资源
相关文章
相关作者
相关机构
苏公网安备32010202012147号
