广东省的地温观测

介绍了广东省开展钻井高精度地温观测试验的基本情况.对1993年至今的观测资料分析表明,在无震背景下.单井日平均温度值维持在千分之一度左右变化,其中个别测站在100km范围内的4级地震前数日,日平均温度出现上升至百分之几度的现象,震后回复正常.表明地温观测是地震短临预报和无震判别研究的有希望的手段之一     

广东省未来十年强震趋势分析

１９９４年９月１６日台湾海峡７．３级地震是７０余年来广东及其近海地区最为突出的地震事件。后续的地震形势如何？本文以东南沿海地区为对象,研究了区内强震活动的时、空、强分布演化特征,综合分析认为,在目前新的地震活跃期中,广东省的强震形势值注意。     

长江口以东6.1级地震前后的电磁辐射现象探讨

利用崇明地震台电磁辐射观测记录,分析了１９９６年１１月９日长江口以东６．１级地震前后的电磁辐射前兆信息的主要特征,探讨了前兆电磁辐射方法在短临地震预报中的应用,说明了该方法是目前短临地震预报中较有希望的方法之一。     

Design and Site Experiment of Groyne in Bore Surging Area of Qiantang River

-The groyne has been used widely in bank protection and river regulation.The plane layoutand structural style of groyne are closely related to the stability of the groyne itself and the effect of bankprotection.In this paper,based on the preliminary summary of the design of bank protection in the boresurging area of Qiantang River,some problems regarding the structure of groyne are pointed out and animproved plan is put forward.Site experiment was carried out combined with an emergency repair.The re-sults of the experiment indicate that the improved project is reliable and successful.     

Numerical Modeling of Water Wave Interaction with A Soft Mud Bed

A vertical 2-D numerical model is presented for simulating the interaction between water waves and a soft mud bed. Taking into aceotmt nonlinear theology, a semi-empirical theological model is applied to this water-mud model, reflecting the combined visco-elasto-plastic properties of soft mud under such oscillatory external forces as water waves. In order to increase the resolution of the flow in the neighborhood of both sides of the inter-surface, a logarithmic grid in the vertical direction is employed for numerical treatment. Model verifications are given through comparisons between the calculated and the measured mud mass transport velocities as well as wave height changes.     

Wind-Wave Frequency Spectra of New Dalian Port

This paper, based on wave data measured with Type 956 Directional WAVE-TRACK Buoy System at new Dalian Port for a whole year, analyses the properties of the wave frequency spectra, and derives the formula for the frequency spectrum of wind-waves.     

Research on the Algorithm CN Applied to Prediction of 23 Strong Earthquakes in China

This paper researches TIP before 23 strong earthquakes occurring in the eastern part and the southern and northern zones of the western part of China and their nearby areas in recent decades.The results show that 18 strong earthquakes occurred within the diagnosed TIP.The TIP precaution occupies about 30% of the total space-time domain which we researched,indicating quite good results of intermediate-term prediction of earthquakes.The algorithm CN can thus be used as an intermediate-term prediction method for strong earthquakes.     

The Program Application on the Relative Method of Fuzzy Mathematics

The method of fuzzy mathematics for simultaneous assessment of time and intensity of earthquake hazards has been studied.This method is based on fundamental statistical indices of regional seismicity.Applying the retrieval method of fuzzy information,we can classify the time and intensity into several intervals and classes of seismic activity,then the possible time interval of large earthquakes with magnitude of M≥Ms can be estimated in a given region.Based on the preceding idea,an FRPP program is constructed.For the automatic data processing when this method is used,it is very important to design the statistical process of each index decomposition so that the program could be fit to a different sample discussed.There are some functions in the FRPP program.The man-made impact on results is reduced to the minimum as far as possible.Computation time is saved.There is a menu on which time interval,index,intensity class,and output data all can be selected.The catalog input that can be displayed on the scre     

Essential Features of Tectonic Movement Revealed by Crustal Vertical Deformations in the Mainland of China

Based on the precise reieveling data of more than 260,000 km carried out from 1950 to 1991 in the Chinese mainland,recent crustal vertical movement is studied.By means of some quantitative indices,such as the pattern of crustal vertical movement,the intensity of differential movement,the maximum gradient and its distribution,etc.,the properties of movements are analyzed on a large scale.The results suggest that all the properties have a profound tectonic background of their own and are closely related to the zoning and seismic activity of active subplates.The driving force for the movement comes mainly from the northward push of the India plate acting on the Eurasia plate.The effects of motions of the Pacific and Philippine Sea plates in the east are much less significant.     

陕西地区地磁湾扰异常

本文从频率域分析了陕西近年来记到的约十个地磁湾扰和磁扰。结果表明,渭河南北的垂直分量位相相反,水平分量也存在异常,源场极化方向和异常幅度有一走关系,同相和异相感应矢量指向渭河方向,这些都说明感应电流从渭河地堑下集中流过。据此推测在地壳下部或地幔上部存在一高导体。结合邻区地磁湾扰和其它短周期异常认为,这个高导体可向东西延伸上千公里长。