地震震级是地震预报三要素的重要参数之一,是衡量地震大小的必不可少的参量。在以震报震的预报方法中,几乎毫无例外地要使用震级资料。但是,直到目前,震级还是一个物理意义含糊、测量非单值的地震学参量。鉴于震级问题的重要性和它的广泛性,为推动震级研究工作,中国地震学会地震学专业委员会组织1981年5月《地震震级学术讨论会》之后,立即成立了地震震级工作组,加强了对震级研究的指导,使地震震级研究出现了新局面。1982年12月,国际地震学和地球内部物理学协会震级分委员会震级的物理基础工作组主席,德意志联邦共和国汉堡大学地球物理系主任、地球物理研究所所长杜达教授来华进行学 Earthquake magnitude is one of the important parameters of the three elements of earthquake prediction and is an indispensable parameter to measure the magnitude of the earthquake. In the earthquake prediction method, almost no exception to the use of magnitude data. However, until now, the magnitude was still a physical obscure measure of seismological parameters that were not singular. In view of the importance and extensiveness of the magnitude problem, an earthquake magnitude working group was set up immediately after the Seismological Committee of the Seismological Society organized the “Earthquake Magnitude Symposium” in May 1981 to promote magnitude research. The study of magnitude makes the research of earthquake magnitude appear a new situation. December 1982, the International Seismological and Geophysical Society earthquake magnitude sub-committee on physical magnitude of the working group chairman of the Federal Republic of Germany Hamburg University Director of Geophysics, Institute of Geophysics, Professor Duda came to China to learn