The Seasonal Variation of Large Volume Airgun Signals in Hutubi,Xinjiang
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摘要
In order to study the seasonal variation of large volume airgun signals in Hutubi, Xinjiang, we analyzed 2,936 signals of airgun source excitations during 2015-2016 received by a seismograph on the bank of the excitation pool. Firstly, the RMS value of the signal amplitude and the daily average temperature were compared after linearly superimposing the signal in days, to analyze the influence of the surface ice cover on the excitation energy release of the airgun source. The result shows that the ice cover will reduce the excitation energy, and the thicker the ice cover is, the more obvious the excitation energy reduces. Secondly, the time-frequency analysis method was used to analyze the influence of the surface ice cover on the signal frequency. It is concluded that the existence of the ice cover has little effect on the signal frequency, but it will affect the intensity of the signal around 4 Hz between 1-2 s after excitation. The cause of these phenomena is that the ice cover affects the bubble oscillation, which in turn affects the energy conversion. The study shows that when using the cross-correlation delay method to calculate the wave velocity, the signals can be divided into two periods according to the daily average temperature: with or without ice cover on the upper surface of the excitation pool. This can help eliminate the influence of the source variation and improve the accuracy of the monitoring results.
In order to study the seasonal variation of large volume airgun signals in Hutubi, Xinjiang, we analyzed 2,936 signals of airgun source excitations during 2015-2016 received by a seismograph on the bank of the excitation pool. Firstly, the RMS value of the signal amplitude and the daily average temperature were compared after linearly superimposing the signal in days, to analyze the influence of the surface ice cover on the excitation energy release of the airgun source. The result shows that the ice cover will reduce the excitation energy, and the thicker the ice cover is, the more obvious the excitation energy reduces. Secondly, the time-frequency analysis method was used to analyze the influence of the surface ice cover on the signal frequency. It is concluded that the existence of the ice cover has little effect on the signal frequency, but it will affect the intensity of the signal around 4 Hz between 1-2 s after excitation. The cause of these phenomena is that the ice cover affects the bubble oscillation, which in turn affects the energy conversion. The study shows that when using the cross-correlation delay method to calculate the wave velocity, the signals can be divided into two periods according to the daily average temperature: with or without ice cover on the upper surface of the excitation pool. This can help eliminate the influence of the source variation and improve the accuracy of the monitoring results.
In order to study the seasonal variation of large volume airgun signals in Hutubi, Xinjiang, we analyzed 2,936 signals of airgun source excitations during 2015-2016 received by a seismograph on the bank of the excitation pool. Firstly, the RMS value of the signal amplitude and the daily average temperature were compared after linearly superimposing the signal in days, to analyze the influence of the surface ice cover on the excitation energy release of the airgun source. The result shows that the ice cover will reduce the excitation energy, and the thicker the ice cover is, the more obvious the excitation energy reduces. Secondly, the time-frequency analysis method was used to analyze the influence of the surface ice cover on the signal frequency. It is concluded that the existence of the ice cover has little effect on the signal frequency, but it will affect the intensity of the signal around 4 Hz between 1-2 s after excitation. The cause of these phenomena is that the ice cover affects the bubble oscillation, which in turn affects the energy conversion. The study shows that when using the cross-correlation delay method to calculate the wave velocity, the signals can be divided into two periods according to the daily average temperature: with or without ice cover on the upper surface of the excitation pool. This can help eliminate the influence of the source variation and improve the accuracy of the monitoring results.
引文
Chen Yong,Wang Baoshan,Ge Hongkui,Xu Ping,Zhang Wei.Proposed of transmitted seismic stations[J].Advances in Earth Science,2007,22(5):441-446 (in Chinese with English abstract).
Helmberger D.,Wiggins R.A.Upper mantle structure of midwestern United States[J].Journal of Geophysical Research,1971,76(14):3229-3245.
Hu Jiupeng,Wang Baoshan,Chen Yong.The influence of water shape on land airgun triggered signals[J].Journal of Seismological Research,2017,40(4):543-549 (in Chinese with English abstract).
Liu Zifeng,Su Youjin,Wang Baoshan,Wang Bin,Yang Jun,Li Xiaobin.Study on analysis method of travel time variations of seismic wave of active source in Binchuan[J].Journal of Seismological Research,2015,38(4):591-597 (in Chinese with English abstract).
Luan Yi,Yang Hongfeng,Wang Baoshan.Large volume air-gun waveform data processing (I):Binchuan,Yunnan[J].Earthquake Research in China,2016,32(2):305-318 (in Chinese with English abstract).
Luo Guichun,Ge Hongkui,Wang Baoshan,Hu Ping,Mu Hongwang,Chen Yong.Fired models of air gun source[J].Earthquake Research in China,2007,23(3):225-232 (in Chinese with English abstract).
Su Jinbo,Wang Qiong,Wang Haitao,Shi Yongjun,Chen Xiangjun,Feng Lei,Chen Hao,Zhang Wenxiu.Research on large volume airgun source signal reception in Hutubi,Xinjiang using seismic network data[J].Earthquake Research in China,2016b,30(3):326-332.
Su Jinbo,Wang Haitao,Wang Qiong,Zhang Wenlai,Ji Zhanbo,Wei Yunyun,Chen Hao,Zhang Wenxiu.A study on the repeatability of large volum arigun seismic source in Hutubi,Xinjiang using cluster analysis method[J].Journal of Seismological Research,2017,40(4):613-618 (in Chinese with English abstract).
Wang Baoshan,Yang Wei,Yuan Songyong,Guo Shijun,Ge Hongkui,Xu Ping,Chen Yong.An experimental study on the excitation of large volume airguns in a small volume body of water[J].Journal of Geophysics and Engineering,2010,7(4):388-394.
Wang Baoshan,Ge Hongkui,Wang Bin,Wang Haitao,Zhang Yuansheng,and Cai Huiteng.Practices and advances in exploring the subsurface structure and its temporal evolution with repeatable artificial sources[J].Earthquake Research in China,2016,30(3):284-297.
Wang Bin,Li Xiaobin,Liu Zifeng,Yang Jun,Yang Runhai,Wang Baoshan and Yang Wei.The source and observation system of binchuan earthquake signal transmitting seismic station and its preliminary observation results[J].Earthquake Research in China,2016,30(3):316-325.
Wei Bin,Su Jinbo,Wang Haitao,Zheng Liming,Wang Qiong,Zhang Wenlai,Yuan Shun,Wei Yunyun,Chen Hao.Site selection and construction of Hutubi airgun source signal transmitting seismic station and its characteristic of source[J].Earthquake Research in China,2016,32(2):222-230 (in Chinese with English abstract).
Wei Yunyun,Wang Haitao,Su Jinbo,Chen Xiangjun,Wang Qiong.The preliminary study on travel time abnormal variation of reflection wave phase of air-gun in Xinjiang before two earthquakes with MS5.0[J].Earthquake Research in China,2016,32(2):270-281 (in Chinese with English abstract).
Wu Anxu,Ye Beng,Li Hong,Li Yun,Zheng Yiwen,Zhang Hongyan,Li Yan.The preliminary analysis of reliability on weak signal extraction for air-gun source surveys[J].Earthquake Research in China,2016,32(2):319-330 (in Chinese with English abstract).
Xia Ji,Jin Xing,Cai Huiteng and Xu Jiajun.The time-frequency characteristic of large volume air-gun source wavelet and its influencing factors[J].Earthquake Research in China,2016a,32(2):249-260 (in Chinese with English abstract).
Xia Ji,Jin Xing,Cai huiteng and xu jiajun.The time-frequency characteristic of a large volume airgun source wavelet and its influencing factors[J].Earthquake Research in China,2016,30(3):364-379.
Yamaoka K.,Miyamachi H.,Watanabe T.,Kunitomo T.,Michishita T.,Ikuta R.,Iguchi M.Active monitoring at an active volcano:amplitude-distance dependence of ACROSS at Sakurajima Volcano,Japan[J].Earth,Planets and Space,2014,66:32.
Yang Wei,Wang Baoshan,Ge Hongkui,Wang Weitao,Chen Yong.The active monitoring system with large volume airgun source and experiment[J].Earthquake Research in China,2013,29(4):399-410 (in Chinese with English abstract).
Zhang Yuansheng,Guo Xiao,Qin Manzhong,Liu Xuzhou,Wei Congxin,Shen Xuzhang,Yan Wenhua,Zou Rui,Yin Liang,Wang Yahong,Sun Dianfeng,Feng Hongwu,Zhang Lifeng,Guo Yingxia.The construction of active source repeated monitoring in the Qilian Mountains of Gansu Province[J].Earthquake Research in China,2016,32(2):209-215 (in Chinese with English abstract).
Helmberger D.,Wiggins R.A.Upper mantle structure of midwestern United States[J].Journal of Geophysical Research,1971,76(14):3229-3245.
Hu Jiupeng,Wang Baoshan,Chen Yong.The influence of water shape on land airgun triggered signals[J].Journal of Seismological Research,2017,40(4):543-549 (in Chinese with English abstract).
Liu Zifeng,Su Youjin,Wang Baoshan,Wang Bin,Yang Jun,Li Xiaobin.Study on analysis method of travel time variations of seismic wave of active source in Binchuan[J].Journal of Seismological Research,2015,38(4):591-597 (in Chinese with English abstract).
Luan Yi,Yang Hongfeng,Wang Baoshan.Large volume air-gun waveform data processing (I):Binchuan,Yunnan[J].Earthquake Research in China,2016,32(2):305-318 (in Chinese with English abstract).
Luo Guichun,Ge Hongkui,Wang Baoshan,Hu Ping,Mu Hongwang,Chen Yong.Fired models of air gun source[J].Earthquake Research in China,2007,23(3):225-232 (in Chinese with English abstract).
Su Jinbo,Wang Qiong,Wang Haitao,Shi Yongjun,Chen Xiangjun,Feng Lei,Chen Hao,Zhang Wenxiu.Research on large volume airgun source signal reception in Hutubi,Xinjiang using seismic network data[J].Earthquake Research in China,2016b,30(3):326-332.
Su Jinbo,Wang Haitao,Wang Qiong,Zhang Wenlai,Ji Zhanbo,Wei Yunyun,Chen Hao,Zhang Wenxiu.A study on the repeatability of large volum arigun seismic source in Hutubi,Xinjiang using cluster analysis method[J].Journal of Seismological Research,2017,40(4):613-618 (in Chinese with English abstract).
Wang Baoshan,Yang Wei,Yuan Songyong,Guo Shijun,Ge Hongkui,Xu Ping,Chen Yong.An experimental study on the excitation of large volume airguns in a small volume body of water[J].Journal of Geophysics and Engineering,2010,7(4):388-394.
Wang Baoshan,Ge Hongkui,Wang Bin,Wang Haitao,Zhang Yuansheng,and Cai Huiteng.Practices and advances in exploring the subsurface structure and its temporal evolution with repeatable artificial sources[J].Earthquake Research in China,2016,30(3):284-297.
Wang Bin,Li Xiaobin,Liu Zifeng,Yang Jun,Yang Runhai,Wang Baoshan and Yang Wei.The source and observation system of binchuan earthquake signal transmitting seismic station and its preliminary observation results[J].Earthquake Research in China,2016,30(3):316-325.
Wei Bin,Su Jinbo,Wang Haitao,Zheng Liming,Wang Qiong,Zhang Wenlai,Yuan Shun,Wei Yunyun,Chen Hao.Site selection and construction of Hutubi airgun source signal transmitting seismic station and its characteristic of source[J].Earthquake Research in China,2016,32(2):222-230 (in Chinese with English abstract).
Wei Yunyun,Wang Haitao,Su Jinbo,Chen Xiangjun,Wang Qiong.The preliminary study on travel time abnormal variation of reflection wave phase of air-gun in Xinjiang before two earthquakes with MS5.0[J].Earthquake Research in China,2016,32(2):270-281 (in Chinese with English abstract).
Wu Anxu,Ye Beng,Li Hong,Li Yun,Zheng Yiwen,Zhang Hongyan,Li Yan.The preliminary analysis of reliability on weak signal extraction for air-gun source surveys[J].Earthquake Research in China,2016,32(2):319-330 (in Chinese with English abstract).
Xia Ji,Jin Xing,Cai Huiteng and Xu Jiajun.The time-frequency characteristic of large volume air-gun source wavelet and its influencing factors[J].Earthquake Research in China,2016a,32(2):249-260 (in Chinese with English abstract).
Xia Ji,Jin Xing,Cai huiteng and xu jiajun.The time-frequency characteristic of a large volume airgun source wavelet and its influencing factors[J].Earthquake Research in China,2016,30(3):364-379.
Yamaoka K.,Miyamachi H.,Watanabe T.,Kunitomo T.,Michishita T.,Ikuta R.,Iguchi M.Active monitoring at an active volcano:amplitude-distance dependence of ACROSS at Sakurajima Volcano,Japan[J].Earth,Planets and Space,2014,66:32.
Yang Wei,Wang Baoshan,Ge Hongkui,Wang Weitao,Chen Yong.The active monitoring system with large volume airgun source and experiment[J].Earthquake Research in China,2013,29(4):399-410 (in Chinese with English abstract).
Zhang Yuansheng,Guo Xiao,Qin Manzhong,Liu Xuzhou,Wei Congxin,Shen Xuzhang,Yan Wenhua,Zou Rui,Yin Liang,Wang Yahong,Sun Dianfeng,Feng Hongwu,Zhang Lifeng,Guo Yingxia.The construction of active source repeated monitoring in the Qilian Mountains of Gansu Province[J].Earthquake Research in China,2016,32(2):209-215 (in Chinese with English abstract).