黑龙江科技大学学报2018，Vol.28Issue(2)：227-233,7.DOI:10.3969/j.issn.2095-7262.2018.02.020
基于振幅相对变化实现地震预警中P波的自动拾取
Automatic realization of P Wave PickuP in earthquake early Warning With amPlitude relative change
摘要
Abstract
This paper is motivated by the need for improving the anti-interference of seismic P-wave automatic pickup and proposes the method of amplitude relative change's STA/LTA transform.The study shows that as the characteristic function,the amplitude relative change could highlight the seismic wave abrupt characteristics at the seismic wave arrival time more clearly than amplitude absolute change.The calculation of STA/LTA transform using the characteristic function could provide a reduction in the seis-mic wave arrival time pickup error due to interference.Picking up the P arrival times of 160 earthquakes using STA/LTA of amplitude relative change,Allen method,AIC criterion and PAI-S/K method respec-tively under the same interference verifies that our method has a stronger anti-interference capability.The method promises an application in earthquake early warning thanks to its ability to determine the appropri-ate threshold,coupled with the consideration of environmental interference, instrument interference and local earthquake characteristics.关键词
地震预警/P波初至/振幅相对变化/STA/LTA变换Key words
earthquake early warning/arrival time of seismic P wave/amplitude relative change/STA/LTA transform分类
天文与地球科学引用本文复制引用
李启成,何书耕,席桂梅..基于振幅相对变化实现地震预警中P波的自动拾取[J].黑龙江科技大学学报,2018,28(2):227-233,7.基金项目
辽宁省教育厅科学技术研究项目(551610001219) （551610001219）
