| 京津唐地区的重力变化 |
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| 引用本文： | 华昌才,沈晶,郭凤义,张征宇,J.T.Kuo,W.E.Brown.京津唐地区的重力变化[J].地震学报,1987,9(3):319-325. |
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| 作者姓名： | 华昌才 沈晶 郭凤义 张征宇 J.T.Kuo W.E.Brown |
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| 作者单位： | 1. 国家地震局地球物理研究所
2. 美国哥仑比亚大学 |
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| 摘 要： | 我们重力测量组在1981年7月用三台 LCR 重力仪建立了重力测网.测量精度优于100nm/s2.文章描述了京,津,唐地区重力随时间的变化.结果表明在天津地区增加了约1000nm/s2,天津是沉降中心,每年平均沉降约7——8cm.在其它台站,如堂二里,霸县等地重力值也逐年增加,但其幅度小于天津.重力变化的空间分布由东南向西北逐渐减小.
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GRAVITY CHANGE IN THE BEIJING-TIANJIN-TANGSHAN AREA |
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| Institution: | 1. Institute of Geophysics State Seismolocal Bureau;
2. Geophysics Department of Columbia University |
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| Abstract: | A gravity net-work was set up through a group of gravity measurements in July, 1981 with three LCR gravimeters. The errors of measarement are less than 100 nm/s2. The detected changes of gravity with time in the Beijing-Tianjin-Tangshan area are described in this article.The results show that the gravity has increased by about 1000 nm/s2 in the area round, where the ground has subsided at a rate of 7-8 cm/year with Tianjin as the center of subsidence and gravity increase.At other stations, such as Baodi, Tangerli etc. gravity has also increased gradully, but the amplitude is smaller than that at Tianjin. The tendency of gravity change is smaller in the north-west part than in the south-east part of the area. |
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