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[1]XIN Hai-liang,LIU Ming-jun,ZHANG Yuan-sheng,et al.Relocation of the Earthquakes in the Southeast Area of Gansu[J].Journal of Seismological Research,2010,33(03):292-299.

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Relocation of the Earthquakes in the Southeast Area of Gansu

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 33 Number of periods: 2010 03 Page number: 292-299 Column: Public date: 2010-03-01

Title:: Relocation of the Earthquakes in the Southeast Area of Gansu

Author(s):: XIN Hai-liang¹; LIU Ming-jun¹; ZHANG Yuan-sheng²; ZENG Xian-wei³; HU Zhong-min¹; (1.Research Center of Exploration Geophysics,China Earthquake Administration,Zhengzhou 450002,Henan,China)(2.Lanzhou Institute of Seismology,China Earthquake Administration,Lanzhou 730000,Gansu,China)(3.Earthquake Administration of Ningxia Hui Autonomous Region,Yinchuan 750001,Ningxia,China)

Keywords:: double-difference algorithm; genetic algorithm; focal depth; seismogenic layer; southeast area of Gansu

CLC:: P315.63

DOI:: -

Abstract:: We relocate earthquakes occurred in the southeast area of Gansu from 2001 to 2007 using double-difference method and genetic algorithm method.The result shows that the earthquakes are more spatially concentrated and in some areas the earthquakes tend to get close to tectonic belts.The average hypocenter depth is 14.6 km and the seismogenic layer ranges from 5 km to 20 km.After relocating three moderately strong earthquakes,we find that they were all occurred in the edge of the main active faults.The relationship between seismic depth distribution and fault structure portray the spreading characteristics of different faults along the profile in the deep,and some faults stretch to the middle and deep crust.

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Last Update: 2010-03-23