摘要
对GSN台网的HIA地震台站与CTBTO/IMS的PS12地震台阵记录的2007年12月11日河北怀来"明灯1号"爆炸及2006年10月9日朝鲜爆炸事件进行对比分析。结果显示:PS12台阵子台监测的P波信噪比提高至普通台站监测的P波信噪比的4.6倍;利用聚束技术进一步压低噪声后,PS12台阵聚束信号的信噪比提高至单个钻井台站的3倍,比普通HIA台站记录的地震信号信噪比高10多倍。研究结果表明,钻井小孔径台阵可高效提高微弱信号的检测能力。
In this paper, we analyzed the waveforms of the two explosions that occurred on Dec. 11, 2007 and Oct. 9, 2006 as recorded using the HIA seismic station and the PS12 borehole seismic array. The results show that a borehole station can raise the signal-to-noise ratio （SNR） of the P waves to 4.6 times that of the common station at the same distance. With the beamforming technique, the SNR of the beamforming waveform from the PS12 is 3 times that from the single borehole station and over 10 times than that of the waveform recorded by the HIA. So the PS12 borehole seismic array can effectively improve the SNR of weak signals.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2017年第5期822-828,共7页
Explosion and Shock Waves
基金
国家自然科学基金项目(41474114)
关键词
微弱爆炸信号
地震台阵
HIA
PS12
信噪比
聚束技术
weak explosion signals
seismic array
HIA
PS12
signal-to-noise ratio
beamforming technique
