During the last four years there have been significant advances in China, a country with intense seismic activity and earthquake disasters, in the study of seismology and physics of the Earth's interior. These results are of significant help to the social endeavor for the reduction of earthquake hazard and risk, and potentially have an important impact on the development of seismology and solid-Earth geophysics even in a global perspective. Besides the continuous advancements in the on-going researches on seismic source, seismic waves, earthquake prediction, seismo-tectonics, Earth structure and geodynamics, and interdisciplinary studies related to the phenomenology and physics of earthquakes, among others, in the turn of the centuries, the development of seismology in China is specially highlighted by its comprehensive upgrading of observation/research facilities as marked by the digital broadband seismograph networks and data centers at national, regional and local levels, permanent and mobile networks of global positioning system (GPS), and the geodynamical modeling using high-performance computation.
The present National Report, organized by the Chinese National Committee for the International Association of Seismology and Physics of the Earth's Interior (IASPEI), reviews the developments in seismology in the Chinese mainland from 1999 to 2002. Printed reports are going to be published in Acta Seismologica Sinica (Chinese and English edition), the bulletin of the Seismological Society of China, as a special issue. Electronic National Reports are going to be published by the China Meteorological Press, Beijing, as pdf files in CD and will be put onto the website of the China Association of Science and Technology (CAST). In China, at present, most of the publications are in Chinese (with English or Russian abstract), although quite a few Chinese seismologists also publish their researches in international journals. Accordingly, the National Report is of special importance for letting international colleagues understand what is going on in the seismological studies in China. It is worth acknowledging that contributions to seismological researches from the Chinese seismologists in Taiwan and Hong Kong, as well as from the overseas Chinese seismologists all over the world, are also significant, which are not reflected in the present national reports due to limitation of space and time. Cooperation between seismologists in the Chinese mainland and other places got fruitful results in many aspects. In the study of earthquake hazard and risk, earthquake engineers, engineering seismologists and earthquake seismologists have close cooperation in many fields. Reflected in the present national report is only the study of earthquake disasters in the view of earthquake seismology, with necessary overlaps with engineering seismology. Seismology as a tool of prospecting the lithosphere and crust structure also contributed much to the study of fundamental geology and the development of oil industry. What is reflected in the present report is only the study of seismo-tectonics in the perspective of the geology and geodynamics of earthquakes.
During the last four years seismological researches in China got significant supports from the National Natural Science Foundation of China (NSFC), the Ministry of Science and Technology (MOST), the China Seismological Bureau (CSB), and the Chinese Academy of Sciences (CAS), as well as other governmental and non-governmental organizations, especially from the central government. The cooperation with IUGG, IASPEI, Asian Seismological Commission (ASC), and other international organizations, plays an active role in promoting the international exchange and collaboration between seismologists in China and other countries. We acknowledge the China Association of Science and Technology (CAST) for financial support to the publication of this National Report and the China Meteorological Press and the editorial office of Acta Seismologica Sinica for extensive paper work in the editing of the manuscripts.
CHEN Yuntai, Chairman
SHI Yaolin, Vice-Chairman
WU Zhongliang, Secretary-General
Chinese National Committee for IASPEI