【摘要】 本文将HZ-MS48微地震采集仪监测的实际数据,利用STA/LTA算法来识别微地震事件P波到时.比较了在不同STA(短时窗平均值)情况下对拾取精度和结果的影响.结果表明:此算法确定信噪比比较高的微地震事件是非常有效的,能精确拾取P波到时.利用5ms、10ms、20ms三种不同的短时窗处理数据,发现对P波拾取的敏感程度不同,短时窗的值越大,拾取P波的敏感性越低,拾取精度降低,触发的阈值应随着短时窗的增加而减小.更多还原

【Abstract】 This paper introduces the STA/LTA algorithm to deal with the data obtained by the HZ-MS48 micro seismic monitoring acquisition instrument.To identify micro seismic events P-wave arrives,we compared the results of picking precision on the different STA (short-time window on average) cases.The results show that the STA/ LTA algorithm determines the high signal-to-noise ratio (SNR) micro seismic events very effectively.The sensitive degree of picking P wave is different in the cases of using different short-time windows.The greater value of short-time windows,the lower sensitivity and accuracy.The triggering threshold should decrease with the increase of short-time window.更多还原