摘要
分析了2009年至2012年巴塘台测定的ML≥3．0的近震共540个，计算出了它们与中国地震台网中心（CSN）发布的ML震级之间的偏差，找出了巴塘台弱S波出现的区域。用相同标准震级，相等震中距的方法，找出了正常波形记录与弱S波波形记录之间的振幅比，计算出了弱S波地震的震级偏差程度，发现该台记录到的弱S波的比例高达46．5％，弱S波的震级偏差达0．7，其结果有利于地震震级测定的准确性．
After analyzing 540 near earthquakes of ML≥3. 0 determined by Batang station from 2009 to 2012, we calculated the magnitude deviation from that released by China Earthquake Net- works Center {CSN） ,and then found out the regions where weak S-wave occurred at Batang sta- tion. Using the methods of same standard magnitude and same epicenter distance, the amplitude ratio of normal waveform recording to weak S-waveform recording was found and the magnitude deviation degree of weak S-waveform earthquakes was also calculated： the former at Batang sta- tion is up to 46.5 % and the latter is 0.7. This study could make the determination of earthquake magnitude of our station more accurate.
出处
《西北地震学报》
CSCD
北大核心
2013年第B12期81-84,共4页
Northwestern Seismological Journal
关键词
数字地震观测
近震
弱S波
震级偏差
digital earthquake observation
near earthquake
weak S-wave
magnitude deviation
