Results 1 to 10 of about 120,186 (297)
Applied Sciences, 2023 P-wave first-motion polarity is important for the inversion of earthquake focal mechanism solutions. The focal mechanism solution can further contribute to our understanding of the source rupture process, the fault structure, and the regional stress ...
Shuai Li +5 more
doaj +4 more sources
Study on three independent parameters of focal mechanism solution [PDF]
Earthquake Science, 2017 In this paper, the relationships of the plunges and azimuths of T and P axes versus the strikes, dips, and rakes of two seismic nodal planes were derived to provide reference for earthquake researchers. The independence of the plunges and azimuths of T, B, and P axes in focal mechanism solution was discussed, and it was concluded that three parameters,
Kai Tan, Tan Kai
exaly +2 more sources
Normative expression and accurate understanding of focal mechanism parameters
Geosystems and Geoenvironment, 2023 This paper aims at the understanding of the relationship between the upper and lower hemisphere projection maps of the focal sphere, the correct reading of the focal mechanism parameters on the projection diagram, and to investigate if there is ...
Xuecan Jia +3 more
doaj +3 more sources
Seismicity distribution and focal mechanism solution of major earthquakes of northern Pakistan [PDF]
Acta Geodaetica Et Geophysica, 2015 Pakistan is situated very close to the subduction zone of Indian-Arabian plates and Indian-Eurasian plates. Thus, it is a country with moderate to high seismicity with a large number of major earthquakes. Therefore, the severity of seismic hazards of major earthquakes is not ignorable. The seismicity of northern areas of Pakistan (33–37°N and 70–76°E),
Perveiz Khalid +2 more
exaly +3 more sources
Stress inversion from the focal mechanism solution of Bam earthquake aftershocks (Iran, 2003)
Journal of Geophysics and Engineering, 2010 Stress determination can be performed by different inversion techniques using fault-slip data resulted from focal mechanism solutions obtained from earthquake shock records. Inversion methods, explicitly or implicitly, use the object function that evaluates the fitness of some assumed stress state to the fault-slip data.
Vahidoddin Fattahpour, Mahdi Moosavi
exaly +2 more sources
Reliability of Focal Mechanism Solutions for Small and Medium Earthquakes Based on Different Methods
Taiyuan Ligong Daxue xuebao, 2022 Three representative small and medium earthquakes in Shanxi seismic belt in recent years were taken as examples. By using different methods, such as the first motion of P-wave, first motion of P-wave combining P/SV/SH amplitude ratio, CAP (Cut and Past),
Penghu GUAN +4 more
doaj +2 more sources
Study on the Focal Mechanism of the M5.1 Badong Earthquake in Hubei
Geodesy and Geodynamics, 2014 The focal mechanism solutions of the M5. 1 Badong earthquake and subsequent 34 aftershocks at ML 2. 0 or more were calculated using the P-wave first motion method; the main earthquake was normal fault dip slip type, and the slip types of the seismogenic ...
Chen Junhua, Zhao Lingyun, Wu Haibo
doaj +3 more sources
Constraint on the focal mechanism of the 2011 Tohoku earthquake from the radial modes
Geodesy and GeodynamicsDifferent from other normal modes of the Earth's free oscillation that depend on all the six components (Mrr, Mtt, Mpp, Mrt, Mrp, and Mtp) of the centroid moment tensor, the amplitudes of the radial modes depend on the Mrr component (e.g., scalar moment (
Weikun Chen, Hao Ding
doaj +3 more sources
地震科学进展, 2021 On June 9，2020，an earthquake measuring ML3.4 occurred in Shapotou District，Zhongwei City，Ningxia. The earthquake occurred in the meizoseismal area of the 1709 M7½ earthquake of South Zhongwei，and its epicenter is located in an area where there were ...
Yingcai Xu +3 more
doaj +1 more source
Relocation and focal mechanisms of the 2021 Wuzhong-Lingwu ML3.6 seismic swarm
地震科学进展, 2022 From July 18 to August 7 in 2021, a significant activity of ML3.6 earthquake swarm occurred in Wuzhong-Lingwu area, Ningxia. In this paper, the earthquake swarm are relocated using the multi-step locating method.
Yingcai Xu, Xianwei Zeng, Guofu Luo
doaj +1 more source