Results 11 to 20 of about 945 (180)
Study of the OLR Anomalies before the 2023 Turkey M7.8 Earthquake
Remote Sensing, 2023 Using the model of the additive tectonic stress from celestial tide-generating force, we studied the relationship between the seismogenic structure and celestial tide-generating stress in the M7.8 Turkey earthquake on 6 February 2023.
Jun Liu +6 more
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Open Geosciences, 2022 On March 23, 2021 (21:14 universal time coordinated), an Mw 5.3 earthquake occurred in Baicheng County in Xinjiang, northwestern China, according to the United States Geological Survey. The earthquake produced a 4-km-long surface rupture at the epicenter,
Yushan Ailixiati +6 more
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Focal mechanism and seismogenic structure of the Shiqu MS4.4 earthquake
Earthquake Research Advances, 2021 The focal mechanism solution of the Shiqu MS 4.4 earthquake occurred on May 16th, 2017 in Sichuan Province is studied by the gCAP method using the waveform data from the regional seismic networks in Sichuan, Qinghai, Tibet and Gansu provinces. The strike/dip/dipping angle of the first nodal plane are 214°/80°/167° and those of the second nodal plane ...
Yanming Yang, Shubo Wang, Riya Su
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2022年1月8日青海门源MS6.9地震序列重定位和震源机制解研究
Dizhen xuebao, 2022 2022年1月8日青海省海北州门源县发生MS6.9地震，震后产生了长约22 km的地表破裂带，青海、甘肃和宁夏等多地震感强烈。本文基于区域地震台网资料，通过多阶段定位方法对门源MS6.9地震早期序列（2022年1月8日至12日）进行了重定位，并利用gCAP方法反演了主震和MS≥3.4余震的震源机制和震源矩心深度，计算了现今应力场体系在门源MS6.9地震震源机制两个节面产生的相对剪应力和正应力。结果表明：门源MS6.9地震的初始破裂深度为7.8 km，震源矩心深度为4 km ...
Yingcai Xu, Xiangyun Guo, Lili Feng
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Terrestrial, Atmospheric and Oceanic Sciences, 2016 Taiwan is located at an active plate boundary and prone to earthquake hazards. To evaluate the island’s seismic risk, the Taiwan Earthquake Model (TEM) project, supported by the Ministry of Sciences and Technology, evaluates earthquake hazard, risk, and ...
J. Bruce H. Shyu +4 more
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Structure-controlled asperity on the generation of large earthquakes
地球与行星物理论评, 2022 The occurrence of large earthquakes is not only related to the fault geometry and state of stress accumulation, but also closely related to the structure of surrounding rocks.
Quan Sun +3 more
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2003 Mw6.8 Chengkung earthquake and its related seismogenic structures [PDF]
Journal of Asian Earth Sciences, 2007 Abstract The Mw = 6.8 Chengkung earthquake on December 10, 2003 in eastern Taiwan was associated with abundant aftershocks. To explore the seismogenic mechanism and its causative fault system, we relocated the aftershocks, determined the focal mechanisms from P-wave polarities and used the Finite Dimension Source Model method to identify the fault ...
Kuochen, Hao +3 more
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濑溪河流域地貌对泸县MS6.0地震发震构造变形的响应及其指示作用
Dizhen xuebao, 2022 以12.5 m 数字高程模型数据为基础，采用数字地貌分析方法提取了濑溪河流域的高程剖面和面积-高程积分（HI）等地貌参数，分析了2021年9月16日四川盆地东南部泸县MS6.0地震震中附近区域地貌与构造活动的响应关系。结果显示：震中西侧的螺观山和梯子崖背斜在震中的南北两端存在明显的缩短量差异；HI条带状低值区的展布方向与流域内构造的方向一致，HI高值区位于华蓥山两条断裂夹持的谷地，但在震中附近存在WNW向的HI低值带。综合分析认为，泸县地震震中附近应存在一走向为WNW的隐伏构造 ...
Wenying Zhou +7 more
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Dizhen xuebao, 2019 为研究川滇地区地壳密度的时空演化特征与强震孕育的关系，本文基于2011—2014年川滇地区的重力复测资料，利用阻尼最小二乘反演算法，获得了川滇地区0—50 km深度范围内分辨率为55 km×55 km×10 km （长×宽×高）的三维动态密度变化模型。以所获取的动态密度变化为依据，分析了川滇地区三维密度变化特征与2013年四川芦山MS7.0、2014年云南鲁甸MS6.5和四川康定MS6.3地震的关系，并由此对强震重点构造部位的深部地壳结构特征、孕震背景及区域动力学过程进行了深入分析。结果显示 ...
Honglei Li, Shi Chen
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Dizhen xuebao, 2020 基于首都圈数字地震台网的宽频带资料，首先采用CAP方法确定了永清MS4.3地震和廊坊MS3.0地震的震源机制解：永清地震节面Ⅰ的走向、倾角和滑动角分别为52°，62°和−140°，节面Ⅱ的走向、倾角和滑动角分别为300°，55°和−35°；廊坊地震节面I的走向、倾角和滑动角分别为48°，57°和−147°，节面Ⅱ的走向、倾角和滑动角分别为299°，63°和−38°。两次地震的震源机制解较为一致，推测它们可能具有相同的发震断层。利用近震转换波获得两次地震的震源深度，分别为19 km和13 km ...
He Li +4 more
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