| Automatic onset phase picking for portable seismic array observation |
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| 作者姓名： | 王继 陈九辉 刘启元 李顺成 郭飚 |
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| 作者单位： | State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing100029, China |
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| 基金项目： | National Natural Science Foundation of China （Grant No. 40234043）. |
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| 摘 要： | 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 proporty 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, our algorithm is also able to effectually avoid manual misdetections.
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| 关 键 词： | 地震观测 相位 数据处理 排列分布 |
| 文章编号： | 1000-9116（2006）01-0044-10 |
| 收稿时间： | 2005-06-09 |
| 修稿时间： | 2005-10-24 |
Automatic onset phase picking for portable seismic array observation |
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| WANG Ji,CHEN Jiu-hui,LIU Qi-yuan,LI Shun-cheng,GUO Biao.Automatic onset phase picking for portable seismic array observation[J].Acta Seismologica Sinica(English Edition),2006,19(1):44-53. |
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| Authors: | WANG Ji CHEN Jiu-hui LIU Qi-yuan LI Shun-cheng GUO Biao |
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| Institution: | State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China |
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| Abstract: | 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, our algorithm is also able to effectually avoid manual misdetections. |
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| Keywords: | seismic array observation onset phase automatic phase picking multi-channel cross correlation |
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