| 民乐盆地及其周围地区小震震源参数的研究 |
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| 引用本文： | 姚立珣,温增平,虞雪君,汪进. 民乐盆地及其周围地区小震震源参数的研究[J]. 地震工程学报, 1992, 14(3): 27-33 |
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| 作者姓名： | 姚立珣 温增平 虞雪君 汪进 |
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| 作者单位： | 国家地震局兰州地震研究所，国家地震局兰州地震研究所，国家地震局兰州地震研究所，国家地震局兰州地震研究所 美国南加利福尼亚大学地质科学系 |
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| 摘 要： | 本文利用中国和法国合作建立的张掖数字化地震台网记录的小震资料,测定了民乐、肃南、张掖和临泽4个地区的小震震源参数。用P波测定的上述4个地区的应力降为6.1—9.5bar,用S波测定的应力降为26—60bar。在肃南5.7级地震发生前一个月左右,出现应力降减小的现象,这可能是一种前兆信息。本文还对用两种波测定的应力降的差异进行了初步讨论。
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| 关 键 词： | 地震 震源 参数 地震前兆 |
| 收稿时间： | 1992-01-24 |
PARAMETERS OF SMALL EARTHQUAKES IN AND AROUND MINLE BASIN |
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| Yao Lixun,Wen Zengping,Yu Xuejun and Wang Jin. PARAMETERS OF SMALL EARTHQUAKES IN AND AROUND MINLE BASIN[J]. China Earthguake Engineering Journal, 1992, 14(3): 27-33 |
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| Authors: | Yao Lixun Wen Zengping Yu Xuejun Wang Jin |
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| Affiliation: | Earthquake Research Institute Lanzhou, SSB, 730000, China,Earthquake Research Institute Lanzhou, SSB, 730000, China,Earthquake Research Institute Lanzhou, SSB, 730000, China and Earthquake Research Institute Lanzhou, SSB, 730000, China |
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| Abstract: | The digitaL seismograph network set, up by China and France in Zhangye had operated in 1988. There are eleven substations. which were situated in middle segment of Hexi corridor and Qilian Mountain. Using the small earthquakes recorded by Zhangye digital network the Paramrneters of earthquake of Minle. Su'nan. Zhangye and Linze area were measured. The stress drops of these foulareas are a range from 6.1 to 9.5 bar using P wave. and from 26 to 60 bar using S wave, which belong to lower drops The change curve of stress drop versus time had Showed lower value about in a month before Su'nan earthquake (M_s=5.7). This phenomenon may be a preeursor information. In this paper the different results of stress drops measured using P wave and S wave were preliminarily discussed. |
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| Keywords: | Minle Basin. parameter of earthquake precursor |
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