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Acta Seismologica Sinica, 1998
The sequence characteristics and focal mechanism solution of the Jiashi, Xinjiang strong earthquake swarm are analyzed and studied in this paper. The result shows that before the MS=6.6 earthquake, value h of sequence frequency attenuation coefficient was less than 1, then value h was more than 1.
Xin Yang, Guo-Ying Gao
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The sequence characteristics and focal mechanism solution of the Jiashi, Xinjiang strong earthquake swarm are analyzed and studied in this paper. The result shows that before the MS=6.6 earthquake, value h of sequence frequency attenuation coefficient was less than 1, then value h was more than 1.
Xin Yang, Guo-Ying Gao
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Determination of focal mechanism solution using initial motion polarity of P and S waves
Physics of the Earth and Planetary Interiors, 2002Abstract It is important to determine accurate focal mechanism solutions for earthquakes with small magnitudes or those recorded by a small number of seismometers, perhaps with an unfavorable geographic distribution. A method using initial motion polarity of S waves, in addition to P waves, is described.
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Acta Seismologica Sinica, 2006
Based on P-and S-wave amplitudes and some clear initial P-wave motion data, we calculated focal mechanism solutions of 928 M≥2.5 earthquakes (1994–2005) in four sub-blocks of Sichuan and Yunnan Provinces, namely Sichuan-Qinghai, Yajiang, Central Sichuan and Central Yunnan blocks.
Wan-zheng Cheng +2 more
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Based on P-and S-wave amplitudes and some clear initial P-wave motion data, we calculated focal mechanism solutions of 928 M≥2.5 earthquakes (1994–2005) in four sub-blocks of Sichuan and Yunnan Provinces, namely Sichuan-Qinghai, Yajiang, Central Sichuan and Central Yunnan blocks.
Wan-zheng Cheng +2 more
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A probability model for regional focal mechanism solutions
Bulletin of the Seismological Society of America, 1980abstractThe increase in the number of determinations of fault-plane solutions and their use for inferences on regional and local tectonics and stress fields makes it advisable to treat them in a standard way in groups on a regional basis. Probability models for joint group estimation of the shear dislocations, involving data from I earthquakes and J ...
D. R. Brillinger, A. Udias, B. A. Bolt
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Focal Mechanism Solutions and Tectonics of the Middle America ARC
The Journal of Geology, 1978Fault plane solutions of 67 earthquakes along the Middle America arc were determined. These focal mechanisms delineate tectonic activity characteristics of a subduction zone. Focal mechanisms of shallow events beneath the trench axis indicate normal faulting resulting from initial flexure of the downgoing plate.
Bradley W. Dean, Charles L. Drake
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Focal mechanism solutions for roof collapse in deep mine
International Journal of Mining and Mineral Engineering, 2015Microseismic monitoring is an effective means of forecasting instabilities in ruptured rock masses during deep mining. Based on the complex geological conditions of a mine in Southwest China, a digital 24–channel microseismic monitoring system was established to monitor microseismic events during deep mining.
Chun lai Wang +8 more
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Focal-mechanism solutions of earthquakes and tectonics of the hindukush region
Tectonophysics, 1984Abstract Seventeen focal-mechanism solutions have been obtained for earthquakes occurring in the Hindukush region using P-wave first motion directions observed from short as well as long period records. These solutions have indicated a thrust type of faulting. Some of the solutions show small components of strike slip motions.
Avadh Ram, Lalaji Yadav
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Damage indicators and failure prediction in Focal Mechanism solutions
2020<p>Acoustic Emissions (AE), the laboratory analogue to seismic events, recorded during conventional triaxial deformation tests allow for an unprecedented amount of information on the evolution of fractured media within a controlled environment.
Sergio Vinciguerra +3 more
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