Automatic onset phase picking for portable seismic array observation

Automatic phase picking is a critical procedure for seismic data processing, especially for a huge amount of seismic data recorded by a large-scale portable seismic array. In this study is presented a new method used for automatic accurate onset phase picking based on the property of dense seismic a...

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Bibliographic Details
Published in:Acta seismologica sinica 2006-01, Vol.19 (1), p.44-53
Main Authors: Wang, Ji, Chen, Jiu-hui, Liu, Qi-yuan, Li, Shun-cheng, Guo, Biao
Format: Article
Language:chi ; eng
Subjects:
Algorithms
Arrays
Channels
Data processing
Least squares method
Noise levels
Picking
Portability
Seismic engineering
Seismic phenomena
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Summary:Automatic phase picking is a critical procedure for seismic data processing, especially for a huge amount of seismic data recorded by a large-scale portable seismic array. In this study is presented a new method used for automatic accurate onset phase picking based on the property of dense seismic array observations. In our method, the Akaike's information criterion (AIC) for the single channel observation and the least-squares cross-correlation for the multi-channel observation are combined together. The tests by the seismic array observation data after triggering with the short-term average/long-term average (STA/LTA) technique show that the phase picking error is less than 0.3 s for local events by using the single channel AIC algorithm. In terms of multi-channel least-squares cross-correlation technique, the clear teleseismic P onset can be detected reliably. Even for the teleseismic records with high noise level, or algorithm is also able to effectually avoid manual misdetections.
ISSN:1000-9116
1674-4519
1867-8777
DOI:10.1007/s11589-001-0044-0