【摘要】 对昆明地震台数字地震仪记录到的2009年3月19日汤加MS7.7地震的震相进行分析,并将其与兰州、成都、恩施、太原、贵阳五个地震台的记录进行对比,提出了汤加地震的记录特征、分析难点和注意点,同时介绍了对此类SKS波先于S波达到的地震,如何避免将SKS震相误判为S震相的分析方法。更多还原

【Abstract】 We analyze the waveform of the MS7.7 Tonga Earthquake occurred on March 19,2009,which is recorded by the digital seismometers at Kunming Seismic Station,and contrast it with those recorded by other seismic stations such as Lanzhou,Chengdu,Enshi,Taiyuan and Guiyang in China.Thus,we find the features of the waveform of the earthquakes occurred in Tonga,for example,the SKS-phase precedes the S-phase.Then we put forward some methods to help the seismographer correctly determine the SKS-phase and the S-phase.更多还原