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Analysis of datum-instability effect on calculated results of data from Longmen Mountain regional gravity network

Analysis of datum-instability effect on calculated results of data from Longmen Mountain regional gravity network
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摘要 A statistical correlation method is used to study the effect of instability of the calculation datum ( used in traditional method of indirect adjustment) on calculated gravity results, using data recorded by Longmen Mountain regional gravity network during 1996 -2007. The result shows that when this effect is corrected, anomalous gravity changes before the 2008 Wenchuan Ms8. 0 earthquake become obvious and characteristically distinctive. Thus the datum-stability problem must be considered when processing and analyzing data recorded by a regional gravity network. A statistical correlation method is used to study the effect of instability of the calculation datum ( used in traditional method of indirect adjustment) on calculated gravity results, using data recorded by Longmen Mountain regional gravity network during 1996 -2007. The result shows that when this effect is corrected, anomalous gravity changes before the 2008 Wenchuan Ms8. 0 earthquake become obvious and characteristically distinctive. Thus the datum-stability problem must be considered when processing and analyzing data recorded by a regional gravity network.
出处 《Geodesy and Geodynamics》 2011年第4期53-58,共6页 大地测量与地球动力学(英文版)
基金 supported by the Eathquake Science Join Foundation( A07030)
关键词 regional gravity network classic indirect adjustment gravity datum Wenchuan Ms8. 0 earthquake regional gravity network classic indirect adjustment gravity datum Wenchuan Ms8. 0 earthquake
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