论文部分内容阅读
用 SK 地震仪台网的资料,用联合确定地震震级、量规函数和台基校正值的方法,做出了中国大陆地区的均一震级系统,得到了 PZ、PH、SH、SV 四个震相从2.5°—100°新的量规函数,以及我国21个基准台的台基校正值.用这四个量规函数加上台基校正,求得的单台震级的标准误差为0.21—0.23级.6级左右的地震一般都有16个以上台记录到,这时求得的台网平均震级的误差可在0.05级左右.由于体波震级强烈地依赖于仪器类型,所以,我们求得的体波震级 m_(sk)与 m_b 或 m_B 有系统差.我们采取了使 m_(sk)与 M_s 接近的原则.提出了位移谱震级的概念:认为按某一震源参考球的平均值,具有相同强度的 P 波(或 S波)位移谱的地震,则震级相等.这种震级标度有以下优点:(1)它是绝对力学标度,可以把世界上各台网的震级统一起来;(2)物理意义明确,能反映地震大小.对任何大小地震都有定义,无饱和问题,对慢地震也有定义;(3)能和以前使用的震级衔接起来;(4)对位移计地震仪来说,测量方便,误差小.
Using the data of SK seismograph network, the uniform magnitude system of the Chinese mainland was established by means of jointly determining the magnitude of earthquake, the gauge function and the base correction value, and four phases of PZ, PH, SH and SV were obtained. 2.5 ° -100 ° new gauge function and base station correction value of 21 reference stations in our country.Using these four gauge functions plus base correction, the standard error of a single earthquake magnitude obtained is 0.21-0.23 level .6 level Generally speaking, about 16 earthquakes are recorded, and the average error of the station network obtained at this time can be about 0.05. Because the body-wave magnitude strongly depends on the type of instrument, the magnitude of the body-wave we have taken the principle that m sk and M s are close to each other.We put forward the concept of displacement spectral magnitude: Considering the average intensity of a reference source ball of a certain source, P (1) It is an absolute mechanical scale that can unite the magnitudes of the various networks in the world; (2) the physical The meaning is clear, reflecting the magnitude of the earthquake, defined for any size earthquake, without saturation The problem is also defined for slow earthquakes; (3) it is able to interface with previously used magnitudes; and (4) it is easy to measure and the error is small for a displacement meter seismometer.