胶东脉型金矿定量统计模型

胶东存在中深成和浅成两类脉型金矿。定量统计模型研究发现，形成于 挤压地球动力学环境的中深成脉型金矿，成矿深度相对深，规模大，矿化强，形成于拉张地球动力学环境的浅成脉型金矿，成矿深度相对浅，规模小，矿化弱。     

泉州台763长周期地震仪的震相记录特征

76 3长周期地震仪 1 997年起取代基式仪 ,承担我国一类合网对国内外地震的监测和对外观测资料交换任务。本文介绍了我台 76 3长周期地震仪的震相记录特征 ,有利于台站对震相的分析 ,提高对外资料交换和大震速报水平。     

Investigation of rupture process of the 1999 M =5.4 Xiuyan, Liaoning, earthquake sequence

Conclusions The sequence of the November 29, 1999 Xiuyan, Liaoning, earthquake withM _S=5.4 is relocated, and its rupture process is analyzed. Results are as follows: The rupture extended mainly before the January 12, 2000,M _S=5.1 earthquake. There are two phases of rupture extending: The first phase was before the November 29, 1999,M _S=5.4 earthquake, epicenters were situated within a small region with a dimension of about 5 km, and the focal depth increased. It shows that the rupture mainly extended from shallow part to deep in the vertical direction. The second phase was between theM _S=5.4 earthquake and theM _S=5.1 earthquake, earthquakes migrated along southeast, the focal depth decreased. It indicates that the rupture extended along southeast and from deep to shallow part. Foundation item: The Project of “Mechanism and Prediction of the Strong Continental Earthquake” (95-13-05-04). Contribution No. 01FE2017, Institute of Geophysics, China Seismological Bureau.     

世界一些大城市防灾减损的比较研究

比较分析了一些大城市的防灾减损措施，提出了具体对策。     

地震预报探讨中的地磁学手段

地磁手段地地震预测研究中的许多方面发挥了重要作用。在地震前兆的探讨方面占有一席之地；在探测地下构造中有许多贡献。我们可以开展许多与地震预测基础研究有关的地磁研究，例如地磁模型研究、地磁脉动研究、地球深部研究，等等。对地磁场变化规律性的研究也是提取地震地磁前兆的基础。     

加强地震监测预报工作应密切关注的几个问题

目的，科技进步和社会发展对防震减灾部门提出了更高的工作目标和要求。在未来的一段时期内，一方面需要把地震预报工作从经验基础预报向完善的物理模型推进，另一方面要切实加强地震台网的优化工作，保证研究工作的顺利开展。纵观当前的政治经济形势和地震科学研究现状，文章提出了在“十五”期间应特别关注的几个问题：①正确处理“继承和发展”的关系，努力造就跨世纪的监测预报人才；②监测台网优化和监测技术的发展必须重视预报对监测技术的需求；③分析预报工作的基础建设对提高预报工作质量的作用不容忽视。     

隐伏断层灾害的研究与地震保险

简要介绍了近年来一些国家地震灾害造成的经济损失占这些国家国内生产总值的比例；主要介绍了多震地区开展地震断层探测研究的概况以断层活动为基础的地震保险试验的内容及研究进展。     

中国数字化地震观测系统

介绍了中国地震局“九五”重点项目中国数字化地震观测系统，特别重点介绍了中国数字化地震台网、国家标准数字化地震台、中国地震局卫星数据通信网、中国数字地震台网中心的建设规模、设计思路、技术参数、设备结构、服务功能，以及中国数字地震台网的运行流程和运行状况。     

Crustal structure in and around the region of the 1995 Kobe Earthquake deduced from a wide-angle and refraction seismic exploration

Abstract The 1995 Kobe (Hyogo-ken Nanbu) earthquake (M_JMA 7.2, M_w 6.9) occurred on Jan. 17, 1995, at a depth of 17 km, beneath the areas of southern part of Hyogo prefecture and Awaji Island. To investigate P-wave velocity distribution and seismological characteristics in the aftershock area of this great earthquake, a wide-angle and refraction seismic exploration was carried out by the Research Group for Explosion Seismology (RGES) . The profile including 6 shot points and 205 observations was 135 km in length, extending from Keihoku, Northern Kyoto prefecture, through Kobe, to Seidan on Awaji Island. The charge of each shot was 350–700 kg. The P-wave velocity structure model showed a complicated sedimentary layer which is shallower than 2.5 km, a 2.5 km-thick basement layer whose velocity is 5.5 km/s, overlying the crystalline upper crust, and the boundary between the upper and lower crust.
Almost all aftershock hypocenters were located in the upper crust. However, the structure model suggests that the hypocenters of the main shock and some aftershock clusters were situated deeper than the boundary between the upper and lower crust. We found that the P-velocity in the upper crust beneath the northern part of Awaji Island is 5.64 km/s which is 3% lower than that of the surrounding area. The low-velocity zone coincides with the region where the high stress moment release was observed.     

Quaternary vertical offset and average slip rate of the Nojima Fault on Awaji Island, Japan

Abstract Drilling was carried out to penetrate the Nojima Fault where the surface rupture occurred associated with the 1995 Hyogo-ken Nanbu earthquake. Two 500 m boreholes were successfully drilled through the fault zone at a depth of 389.4 m. The drilling data show that the relative uplift of the south-east side of the Nojima Fault (south-west segment) was approximately 230 m. The Nojima branch fault, which branches from the Nojima Fault, is inferred to extend to the Asano Fault. From the structural contour map of basal unconformity of the Kobe Group, the vertical component of displacement of the Nojima branch–Asano Fault is estimated to be 260–310 m. Because the vertical component of displacement on the Nojima Fault of the north-east segment is a total of those of the Nojima Fault of the south-west segment and of the Nojima branch–Asano Fault, it is estimated to total to 490–540 m. From this, the average vertical component of the slip rate on the Nojima Fault is estimated to be 0.4–0.45 m/10³ years for the past 1.2 million years.