| 利用GDSN宽频带资料研究青海地区1988—1990年强震的震源过程 |
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| 引用本文： | 高原,吴忠良.利用GDSN宽频带资料研究青海地区1988—1990年强震的震源过程[J].华南地震,1997,17(4):10-18. |
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| 作者姓名： | 高原 吴忠良 |
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| 作者单位： | 国家地震局分析预报中心!北京，100036，中国科学技术大学研究生院，北京，100039，国家地震局分析预报中心!北京，100036，国家地震局地球物理研究所!北京，100081，中国科学技术大学研究生院!北京，100039，国家地震局分析预报中心!北京，100036 |
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| 基金项目： | 国家地震局分析预报中心青年基金，地震科学联合基金!196088 |
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| 摘 要： | １９８８至１９９０年，青海地区发生了４次震级大于６．０的强震。利用ＧＤＳＮ宽频带波形资料，通过波形模拟，结合地质构造的背景资料对这几次地震进行了震源破裂和发震构造背景的研究。使用台站的准震源时间函数和准时间差的分析方法，对震源和复杂性进行了讨论。
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| 关 键 词： | 青藏高原 震源过程 波形模拟 强震 地震 |
STUDIES ON SOURCE PROCESSES OF SEVERAL STRONG EARTHQUAKES IN QINGHAI REGION FROM 1988 TO 1990 FROM GDSN BROADBAND DATA |
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| Gao Yuan, Ma Lin , Wu Zhongliang, Chou Huilian, Liu Weihong Center for Analysis and Prediction,SSB,Beijing Institute of Geophysics,SSB,Beijin Graduate School,University of Science and Technology of China Beijin.STUDIES ON SOURCE PROCESSES OF SEVERAL STRONG EARTHQUAKES IN QINGHAI REGION FROM 1988 TO 1990 FROM GDSN BROADBAND DATA[J].South China Journal of Seismology,1997,17(4):10-18. |
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| Authors: | Gao Yuan Ma Lin Wu Zhongliang Chou Huilian Liu Weihong Center for Analysis and Prediction SSB Beijing Institute of Geophysics SSB Beijin Graduate School University of Science and Technology of China Beijin |
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| Institution: | Gao Yuan, Ma Lin , Wu Zhongliang, Chou Huilian, Liu Weihong Center for Analysis and Prediction,SSB,Beijing 100036Institute of Geophysics,SSB,Beijin 100081Graduate School,University of Science and Technology of China Beijin 100039 |
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| Abstract: | From 1888 to 1990, four strong earthquakes which magnitudes were larger than 6.0 ocurred in Qinghai province. Using the GDSN broadband waveform data, both the seismic source rupture features and seismogenic tectonic background of these eaxthquakes are studied combining with geologic data by waveform modelling. Specially, a method of station quasi - source time function (qSTE) and quasi - the difference (qTD) is used to dicuss the complexity of source process. The Ms6.3 Totoheyan earthquake on 5th November 1988 is an event of complicated source process composed of two subevents. The Ms6.1 Mangya earthquake on 14th January 1990 is locted at a convergence of gravity anomaly zones, which rupture propagation direction corresponds with fault direction. It is more complicated for two Ms6.9 and Ms6.3 Gonghe earthquakes on 26th April 1990, in which the former is composed of two subevents and the latter, which occurred for about 30 seconds late than the former, is a large independent repture.According to the source analysis, it is further suggested to the conclusion that the pressure axies of the tectonic stress field in the northeast of Qinghai-Xizang plateau is oriental to NE-SW close to horizontal direction, and with the evolvemen toward the north of Qinghai-Xizang plateau it is changed anticlockwisely to NEE - SSW or N - S close to horizontal direction. |
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| Keywords: | Qinghai-Xizang plateau Source process Rupture feature Wave modelling Quasi-source time function (qSTF) |
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