论文部分内容阅读
本文使用M_(WP)震级测定方法,对地震参数自动测定系统进行了改进,实现了对全球M_W≥6.0地震震级更快更精确的自动测定.与传统的M_L、M_S等震级测定方法相比,M_(WP)震级测定方法有2个显著优点:1由于只使用P波列,因此该方法可使用S波或面波限幅记录,可用波形资料较多;2选取的时间窗位于S波之前,震级测定速度更快.对地震参数自动测定系统在2014年9月22日至2015年12月22日测定的254个全球M_W≥6.0地震参数进行分析,结果表明,M_(WP)与全球矩心矩张量(GCMT)产出的M_W的一致性较好,无明显系统偏差,86.2%的M_(WP)与M_W的偏差绝对值小于等于0.3,可在震后平均531 s获得全球地震时空强参数.中国地震台网对全球中强地震时空强参数的自动测定与准实时地震信息服务,对于提高中国地震台网对全球地震的应急处置能力,提升中国在国际防震减灾领域的影响有现实意义.
In this paper, we use M (WP) magnitude measurement method to improve the automatic seismic measurement system and achieve a faster and more accurate automatic determination of M_W≥6.0 earthquakes in the world.Compared with the traditional M_L and M_S methods, The M_ (WP) magnitude measurement method has two significant advantages: 1 Because only P-wave columns are used, this method can use S-wave or surface-wave amplitude-limited recording with more available waveform data; 2 the time window selected is before the S-wave , And the magnitude is faster.Analysis of 254 global M_W≥6.0 seismic parameters measured from September 22, 2014 to December 22, 2015 by the automatic seismic data acquisition system shows that M_ (WP) and global moment The consistency of the M_W output by the moment of mind tensor (GCMT) is good with no obvious system deviation. The absolute value of the deviation between 86.2% M_ (WP) and M_W is less than or equal to 0.3 and the global seismic space-time can be obtained after 531 s Strong parameters.China Seismological Network automatic determination of strong and medium earthquakes in the world time and space parameters and quasi-real-time seismic information service, for improving China’s seismic network of global seismic emergency handling capacity and enhance China’s impact in the field of international earthquake disaster reduction have a reality significance.