共查询到20条相似文献，搜索用时 31 毫秒
1.
In 1988, an ESC Working Group Macroseismic Scales started upgrading the MSK-81 Intensity Scale. This paper presents the background and decisions made with respect to the so-called seismogeological effects. Discussion has pointed out that they cannot be treated and used in the same way as the effects on humans, objects and buildings, for many reasons. Therefore, the WG adopted the solution of using such effects as a side tool for intensity assessment, providing a comprehensive table where the experimental relations between seismogeological effects and intensity degrees - assessed by means of other effects - are presented. 相似文献
2.
我国是一个强地震较多的国家,几千年来发生了上千次强烈地震,劳动人民与地震灾害作斗争有悠久的历史,但是在历代封建王朝和蒋介石卖国集团统治的旧中国,只留下了悲惨的灾情记载。1920年海源大震时山崩地裂,黑水横流,村镇埋没,死于地震灾害者达二十万人,然而反动统治者置人民生命财产的重大损失于不顾,借地震灾害敲诈勒索,大发横财。 相似文献
3.
Eleonora Spânoche 《Natural Hazards》1990,3(3):261-264
The present study is primarily meant to make a separation of the amplification effects in the intensity distribution within the macroseismic field function of their different causes, i.e. the activation of some regional tectonic lines during the seismic motion and local seismogeological conditions.With this end in view, the methodology used consists of filtering the direct macroseismic observations by means of the weighted mean-values method and outlining the regional and local field anomalies.The regional anomaly map of the macroseismic field of the 4 March 1977 Vrancea earthquake, including the southern and south-eastern part of the Outer Carpathian Zone, has been analyzed. Some dislocations, located in the platform basement, which functioned as seismic energy amplifiers during the event, have been identified.The results obtained can be used in seismotectonic and microzoning studies.Paper presented at the 21st General Assembly of the European Seismological Commission, Sofia, 1988. 相似文献
4.
本文根据近年来福建沿海以及福州市地震地质勘探调研的最新成果 ,分析了长乐市地质构造背景与地震活动的关系 ;为跨断层土壤氡气 ,二氧化碳观测等手段的监测资料分析 ,以及地震预报提供依据。 相似文献
5.
埋藏基岩断层对地震波传播影响的初步研究 总被引：1，自引：0，他引：1
在地震地质研究中,人们发现埋藏基岩断层对地震波传播有不可忽视的影响,但怎样影响及影响程度如何,却是有待研究的问题。本文以室内超声地震模型试验为基础,以控制北京凹陷的埋藏基岩断层为例,从能量角度分析断层对地震波的运动学、动力学特征的影响,得出了若干初步结论。 相似文献
6.
本文提出华东地区以地震地质确定性方法为场地工程勘察估算最大水平加速度的具体步骤,并指出如何考虑远、近场地震对场地地震动的影响,使提出的场地地震动参数更加合理,从而达到提高重大工程的安全度。 相似文献
7.
8.
陕西省矿产资源分布广泛,资源种类丰富,矿产资源开发利用规模大和强度高,产生的矿山地质环境问题严重。在分析矿产资源概况及主要矿山地质环境问题现状的基础上,总结了以往矿山地质环境恢复治理成效及项目安排情况。选取了两个近年来实施的典型矿山地质环境治理项目对恢复治理效果情况进行了说明。结果表明,矿山地质环境治理项目的实施能有效的改善矿山地质环境,具有较大的环境、经济和社会效益。并进一步分析预测了矿山地质环境发展变化趋势,认为陕西省矿山地质环境问题将进入平稳发展阶段,矿山地质环境整体将逐步好转。同时对矿山地质环境恢复治理过程中存在问题进行了剖析,为今后推进矿山地质环境恢复治理提供了借鉴。 相似文献
9.
本文利用现有各种地球物理资料、地震地质资料,探讨了重磁场特征、地壳结构、活动断裂与地震的关系,进而总结出地震震中在地壳介质中的空间分布规律。在此基础上建立了地壳稳定性评价分级指标,并对本区的地壳稳定性进行了评价。 相似文献
10.
滇西北新生代以来地球动力学背景及其环境影响 总被引：11，自引：0，他引：11
新生代、特别是第四纪以来,滇西北地壳活动增强：山脉的构造隆升速率从全新世以前的０．３～１．７ｍｍ／ａ变为全新世以来的２～７．１ｍｍ／ａ;全新世盆地的构造沉降速率较更新世增长１～２个数量级;第四纪断裂（以红河断裂为例）错移速率不断加大;现代地壳应力值高,构造变形速度快,地震活动强度加剧,地热流异常明显。地壳活动性加剧将造成滇西北地势格局和山地地质灾害问题进一步恶化、湖泊加速收缩、区域稳定性降低等一系列环境问题,人类生存环境将更严酷。 相似文献
11.
本文从本区独特的地震地质背景、地震活动与断裂构造关系出发,论述地震破坏对经济发展的影响,说明只有加强防震减灾体系建设,方可保障社会与经济可持续发展。 相似文献
12.
The Royal Academy of History (RAH) of Spain collected very detailed information about the effects on the Spanish territory of the Lisbon, 1755 earthquake, reporting such information within a year after the shock. The data provided by the RAH has been thoroughly analyzed, deriving an M S K intensity value for each one of the localities (more than 1000) included in the report, and an isoseismal map has been obtained from such values. Observations reported, such as tsunami, surface effects, duration of shaking and effects on the population are also discussed. Finally, a comparison is made of the data with the results of recent investigations on the tectonics of the region. 相似文献
13.
Qualitative geological acceptance criteria and quantitative seismological acceptance criteria for radioactive waste disposals are developed. The background material for the initiation of site selection and for its earthquake hazard assessment is discussed. The recent movements of the Earth's surface as well as the other mechanical properties of geological media, hydrological conditions of geological blocks, their groundwater chemistry, geochemical rheology, petrological analyses of rocks, etc., have to be taken into account. A new comprehensive integrated safety analysis of the final underground disposal of spent nuclear fuel has been underway in the Czech Republic since 1991. In accordance with these seismogeological acceptance criteria regions for building underground final radioactive waste disposals are singled out in the Czech Republic. 相似文献
14.
The traditional concept of the rift development of flank depressions in the Baikal rift zone is now doubted in view of some indicators for compression deformations identified by the seismogeological and geodetic methods. Besides, the paleoseismological investigations revealed seismogenic strike-slips and reverse faults in the Tunka fault zone that is a major structure-controlling element of the Tunka rift depression. However, a detailed study of the upslope-facing scarp in the Arshan paleoseismogenic structure zone has shown that its formation might be due to rift mechanism of basin formation. Age estimation has been made for the previously unknown pre-historic earthquake whose epicentral area coincides with the western flank of the Arshan paleoseismogenic structure. Judging from previously determined ages of paleoearthquakes, the mean recurrence period for faulting events on the central Tunka fault is 2780–3440 years. 相似文献
15.
16.
17.
Papailiou M. Mavromichalaki H. Kudela K. Stetiarova J. Dimitrova S. 《Natural Hazards》2012,61(2):719-727
Aviation personnel exposure to cosmic radiation and its biological effects has been an interesting subject for research over
the last decade. In this study, scientific groups from Greece, Slovakia, and Bulgaria collaborated in order to examine the
potential effects of cosmic radiation on the cardiovascular functionality of a group of Slovak aviators. Specifically, daily
data concerning mean values of arterial diastolic and systolic blood pressure, which were registered during the medical examinations
of the group of aviators, were related to daily variations of cosmic ray intensity, as measured by the Neutron Monitor Station
on Lomnicky Stit. Statistical methods (analysis of variance—ANOVA and method of superimposed epochs) were applied in order
to establish a statistical significance (p-values) of the effect of cosmic ray intensity variations on the aforementioned physiological parameters not only on the days
of the events but also on the days preceding and following these events. Results reveal that diastolic and systolic blood
pressure can be influenced by changes in cosmic ray activity. 相似文献
18.
为提高坑透数据解释效果,通过对工作面无线电波透视磁场强度的理论分析与公式推导,表明在正常煤层范围,场强值的变化主要受观测点几何位置控制;而在观测点场强路径穿过地质异常区时,主要影响因素为地质异常区内路径长及电磁波能量吸收系数值。将场强值H与观测点路径长R的乘积命名为M,则正常煤层段M可视为常量,而在地质异常存在范围,M值显著降低。将工作面划分为若干小单元,进行M值层析成像反演,可求取工作面各单元M值,再除以工作面平均宽度,得到各单元格场强值,从而获得工作面实测场强成像图。张集矿探测表明,该方法较好地反映了工作面内地质异常区的平面分布情况,回采验证探测结果可靠。作为新的解释手段,正在实际坑透探测中广泛应用。 相似文献
19.
稳定氧碳同位素在碳酸盐岩成岩环境研究中的应用 总被引：29，自引：0，他引：29
笔者对湖北宜昌寒武系、奥陶系和鄂尔多斯布１井寒武系、任３井奥陶系的大量样品测试和研究结果表明大气淡水成岩环境中的δ１８Ｏ、δ１３Ｃ值均向较高负值漂移；正常和咸化海水成岩环境中δ１８Ｏ、δ１３Ｃ值均向高正值漂移；较深埋藏成岩δ１８Ｏ值向高负值漂移.且与埋深成反比，而δ１３Ｃ值相对较稳定或向低正值漂移。 相似文献
20.
A. N. Ovsyuchenko S. V. Trofimenko A. V. Marakhanov P. S. Karasev E. A. Rogozhin V. S. Imaev V. M. Nikitin N. N. Grib 《Russian Journal of Pacific Geology》2009,3(4):356-373
Active faults play the key role in the formation of the morphological structures and control the seismicity in the Olekma-Stanovoi seismic zone. The detailed geological-structural and morphotectonic studies of fault zones made it possible to estimate the kinematics of the active faults and their activity degree in the Holocene (the last 10 000 years). The latter include old faults such as, for example, the Stanovoi Suture of the Proterozoic age. Most of these faults are the Late Mesozoic and Cenozoic in age. The studies were aimed at reconstructing the past seismogeological processes and were accompanied by trenching across morphological structures that are presumably associated with zones of active tectonic fractures preliminarily studied by geophysical methods. The applied approach allowed us to substantially specify the available information on the seismotectonics and the potential seismic hazard in the region. 相似文献