自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 27    No. 9    September 2020

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Locating microseismic sources based upon L-shaped single-component geophone array: A synthetic study
DING Liang(丁亮)1, 2, LIU Qin-ya(刘沁雅)2, 3, GAO Er-gen(高尔根)4, QIAN Wei(钱卫)1, SUN Shou-cai(孙守才)5

1. School of Earth Sciences and Engineering, Hohai University, Nanjing 211100, China;
2. Department of Physics, University of Toronto, Toronto ON M5S 1A7, Canada;
3. Department of Earth Sciences, University of Toronto, Toronto ON M5S 3B1, Canada;
4. School of Civil Engineering, Anhui Jianzhu University, Hefei, China;
5. School of Earth Sciences, Institute of Disaster Prevention, Beijing 101601 China

Abstract:We have developed a type of L-shaped single-component geophone array as a single station (L-array station) for surface microseismic monitoring. The L-array station consists of two orthogonal sensor arrays, each being a linear array of single-component sensors. L-array stations can be used to accurately estimate the polarization of first arrivals without amplitude picking. In a synthetic example, we first use segmentally iterative ray tracing (SIRT) method and forward model to calculate the travel time and polarization of first arrivals at a set of L-array stations. Then, for each L-array station, the relative delay times of first arrivals along sensor arrays are used to estimate the polarization vector. The small errors in estimated polarization vectors show the reliability and robustness of polarization estimation based on L-array stations. We then use reverse-time ray-tracing (RTRT) method to locate the source position based on estimated polarizations at a set of L-array stations. Very small errors in inverted source location and origin time indicate the great potential of L-array stations for source localization applications in surface microseismic monitoring.

 

Key words: geophone array; polarization; source location; seismic monitoring

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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