Monitoring Subsurface Changes with Active Sources
详细信息
- 责任者：Wang Baoshan (Institute of Geophysics ; China Earthquake Administration ; Beijing 100081 ; China) ; Wang Weitao
- 刊名：Advances in Earth Science
- 出版年：2011
- 卷期：26(3)
- 关键词：人工震源 ; artificial seismic source ; 速度结构 ; velocity structure ; 地球内部 ; earth’s interior
- 页码：p.249-256
- 图表：illus., 1 table, 44 refs.
- 分类号：1600
- issnNo：ISSN1001-8166
- isbnNo：CN62-1091/P
摘要
In this paper, the authors introduce cross-correlation based time delay estimation and its precision limitation. The precision of time delay estimation is limited by the repeatability of source, signal-to-noise ratio and bandwidth of recorded signals. And seismic sources with large capacity and high repeatability are preferred for active monitoring. Advantages and disadvantages of different sources are compared in the paper. According to the comparison, the authors suggest that the airgun source is superior to other sources for the purpose of active monitoring. Techniques as waveform stacking, coda wave interferometry and their application in active monitoring are also introduced.
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