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Study on tectonic stress field in Yingjiang area based on multi-focal mechanism solution sequence
地震科学进展, 2021 In this paper，a total of 162 focal mechanism solutions are collected from several focal mechanism solution sequences in Yingjiang area，and the tectonic stress field inversion is carried out from Sudian fault to Dayingjiang fault.
Bing Feng +4 more
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First-Motion Focal Mechanism Solutions for 2015–2019 M ≥ 4.0 Italian Earthquakes [PDF]
Frontiers in Earth Science, 2021 A list of 100 focal mechanism solutions that occurred in Italy between 2015 and 2019 has been compiled for earthquakes with magnitude M ≥ 4.0. We define earthquake parameters for additional 22 seismic events with 3.0 ≤ M < 4.0 for two specific key zones: Muccia, at the northern termination of the Amatrice–Visso–Norcia 2016–2018 central Italy ...
Maria G. Ciaccio +43 more
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Dizhen xuebao, 2019 基于2009年1月至2017年11月首都圈地区发生的8 061个地震事件的23 293条P波初动极性数据，采用改进的格点尝试法计算了首都圈地区单次地震的震源机制解和小震综合断层面解。在初步分析这些数据的基础上，利用计算得到的单次地震的震源机制解和搜集到的已有历史地震的震源机制解数据，运用线性反演法对首都圈地区构造应力场的时空变化特征进行了研究。结果显示：① 研究区的地震震源机制解类型以走滑型为主，正断型次之，这些地震震源机制解的P轴方位大都为ENE向和近EW向，与该地区的构造应力场方向基本一致 ...
Wenjie Fan +3 more
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Frontiers in Earth Science, 2022 The June 17, 2019, MS 6.0 Changning earthquake is the largest recorded event in the Sichuan basin, spatiotemporal variations of stress field may shed light on the seismogenic mechanism of the earthquake. We determined the focal mechanism solutions (FMSs)
Zhiwei Zhang +5 more
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Dizhen xuebao, 2023 基于四川省威远地区密集流动台站从2019年12月1日至2020年6月30日期间收集到的42个ML3.0—4.5中小地震事件，采用Hypo2000定位法进行精定位，并利用HASH （Hardebeck & Shearer）法反演得到其中31次地震的震源机制解，之后利用阻尼区域应力反演方法计算了研究区的应力场参数。结果表明：中小地震主要分布在威远背斜南翼SSE向墨林场断层的两侧，震源深度集中在10 km以内，均为浅源地震；震源机制解类型以逆冲型为主，断层错动类型较为复杂，根据震源机制解结果 ...
Mengxue Yu +3 more
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Dizhen xuebao, 2021 震后应急工作中地震影响场的判定和快速给出较为合理的地震烈度分布图，是震后应急救援的重要依据，对于政府了解灾情、部署工作以及估算灾害损失都尤为重要，所以本文以此为研究目的，力求震后快速给出准确的地震烈度分布图。本文收集整理了河北地区中强地震的实际等震线图，将其与加入了震源机制解影响参数的烈度衰减关系计算得到的理论等震线图进行对比。结果显示：随着震级的增大，由衰减关系计算得到的等震线图与实际地震等震线图在高烈度区（≥Ⅶ度）相似度更高。另外，根据震后24小时内余震频度的空间变化，对极震区理论等震线修正后 ...
Lina Sun +3 more
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Present-Day Tectonic Stress Evolution in Southern Yunnan Based on Focal Mechanisms
Sensors, 2023 Tectonic extrusion bypassing the eastern Himalayan syntaxis results in a significant increase in regional stress instability and the associated frequent occurrence of earthquakes in southern Yunnan, China.
Wenjie Fan +5 more
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Geomatics, Natural Hazards & Risk, 2022 The Palu earthquake, with a magnitude of 7.5, severely devastated the region in Central Sulawesi, Indonesia, but the mechanism of dynamic rupture considering in-situ conditions is not well understood.
Kanghua Zhang +3 more
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Earthquake Science, 2022 The Xiluodu (XLD) reservoir is the second largest reservoir in China and the largest in the Jinsha River basin. The occurrence of two M > 5 earthquakes after reservoir impoundment has aroused great interest among seismologists and plant operators.
Hongfu Lei +5 more
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The earthquake monitoring system in the South China Sea Tsunami Advisory Center
地震科学进展, 2022 This paper briefly reviewed the initiation steps and developments of the South China Sea Region Tsunami Warning and Mitigation Systems. In addition, we highlighted the structure and basic functions of the earthquake monitoring and processing system of ...
Zhiguo Xu +3 more
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