重大工程地震安评工作中的历史地震资料使用问题专题研讨会在合肥召开

历史地震资料的使用对重大工程地震安全性评价结果有相当大的影响，在地震构造活动较弱的中强地震活动地区这种影响尤为显著。近年来沿长江各省的核电选址工作，凸现了这一问题的重要性。为此，中国地震局震害防御司和中国地震学会历史地震专业委员会于2004年10月12—16日在安徽省合肥市召开了“重大工程地震安评工作中的历史地震资料使用问题专题研讨会”，安徽省地震局黄田庚局长、张鹏副局长、中国地震     

认真学习《地震安全性评价管理条例》加强地震安全性评价的法规化管理

根据广东省目前在地震安全性评价方面存在的问题，谈了学习“地震安全性评价管理条例”的体会，并对如何贯彻执行有关法规，加强地震安全性评价的管理提出建议。     

地震安全性评价效益评估的探讨

地震安全性评价是确定重要建设工程抗震设防要求的基础性工作. 地震安全性评价的效益问题，特别是经济效益问题一直为大家所关注．本文提出了对地震安全性评价的效益进行评估的一种模型，并举例粗略地计算了地震安全性评价的经济效益．      

首届西南地区地震安全性评价工作研讨会在成都成功举行

2006年4月17日-22日，首届西南地区地震安全性评价工作研讨会在成都成功举行。研讨会由四川省地震局工程地震研究院发起和承办，会议的主题：促进西南地区地震安全性评价工作开展，更好地服务社会；促进西南地区各省、市从业单位的相互学习、相互交流，共同提高地震安全性评价工作的质量；加深对GBl7741-2005《工程场地地震安全性评价》的理解，把握地震安全性评价工作的关键技术环节和要点。     

论不同等级地震安全性评价工作场地勘查要点

本文针对当前地震安全性评价报告中存在的问题，依据多年来编写、评审报告的体会，论述了不同级别地震安全性评价工作中场地勘查要点及缘由，期望对改进相关工作有所裨益。     

安徽省地电监测能力综合评价

以影响地电观测质量的主要因素及映震能力作为地电台站监测能力的主要评价指标,对安徽省5个地电台站的监测能力进行了综合评价,得到了安徽省地电前兆的基本情况,为安徽省未来的地电台站建设奠定了基础.     

论加强工程场地地震安全性评价工作的法制管理

通过对地震灾害造成直接经济损失和人员伤亡主要原因以及震害与工程场地条件的关系的分析，论述了场地地震安全性评价的社会与经济效益，以及地震安全性评价法制管理的必要性。并就制定法规应具备的基本条件及其它有关问题进行了讨论。     

青海省地震安全性评价历程与现存的问题

在回顾总结青海省地震安全性评价历程的基础上，分析了目前尚存在的突出问题。     

《甘肃省地震安全性评价管理条例》修订相关问题探讨

自2015年 “放管服” 改革以来,地震安全性评价政策发生重大变化,地震安全性评价资质许可和结果审定等行政许可被取消,改为强制性评估,继而开展区域性地震安全性评价。国家层面的相关行政法规已于2017和2019年进行了两次修订。《甘肃省地震安全性评价管理条例》作为调整甘肃省地震安全性评价相关法律关系的专门性地方性法规,颁布距今已有15年之久,出现与上位法冲突、法律空白及法律滞后性明显等不适应经济社会发展的情形。本文从地方性法规修订的角度出发,阐述了修订的意义、修订应当把握的原则,并就明确地震安全性评价对象、部门职能职责权限、地震安全性评价范围、区域性地震安全性评价等制度方面提出具体建议,分析当前省级地震工作主管部门在修法及工作实践中存在的困境,提出相关建议。      

浅谈地震安全性评价项目档案的收集归档

地震安全性评价工作成果是工程抗震设防的法定依据,做好地震安全性评价项目档案收集整理尤为重要.通过分析地震安全性评价项目档案特点,从领导重视、健全制度、全员参与、纳入绩效、提前介入等方面系统阐述了地震安全性评价项目档案收集归档的主要做法和关键节点,并提出了未来发展的方向.     

Contribution to the knowledge of the magmatic evolution by the study of the variation of the coefficient of viscosity

The determination of the coefficient of viscosity of eruptive products gives useful elements to the knowledge of possible variations of composition and physical conditions of the magmas.     

Pictorial Series of the Manifestations of the Dynamics of the Earth

Studia Geophysica et Geodaetica -     

Magnetic stratigraphy of the Ordovician in the lower reach of the Kotuy River: the age of the Bysy-Yuryakh stratum and the rate of geomagnetic reversals on the eve of the superchron

Until recently, the existing data prevented the geophysicists from accurately dating the Bysy-Yuryakh stratum, which outcrops in the middle reach of the Kotuy River, constraining the time of its formation to a wide interval from the end of the Late Cambrian to the beginning of the Silurian. The obtained paleomagnetic data unambiguously correlate the Bysy-Yuryakh stratum to the Nyaian regional stage and constrain its formation, at least a considerable part of it, by the Tremadocian. This result perfectly agrees with the data on the Bysy-Yuryakh conodonts studied in this work and yields a spectacular example of the successful application of paleomagnetic studies in solving important tasks of stratigraphy and, correspondingly, petroleum geology. Within the Bysy-Yuryakh stratum, we revealed a large normal-polarity interval corresponding to the long (>1 Ma) period when the geomagnetic reversals were absent. This result, in combination with the data for the Tremadocian and Middle–Upper Cambrian sequences of the other regions, indicates that (1) the rate of occurrence of the geomagnetic reversals on the eve of the Ordovician Moyero superchron of reversed polarity was at most one reversal per Ma; (2) the superchron does not switch on instantaneously but is preceded by a certain gradual change in the operation conditions of the dynamo mechanism which, inter alia, manifests itself by the reduction of the frequency of geomagnetic reversals with the approach of the superchron. This finding supports the views according to which a process preparing the establishment of the superchrons takes place at the core–mantle boundary.     

Evolution of the Source of the Active Region of the Sun

Geomagnetism and Aeronomy - The magnetic evolution of the active region of the Sun at the level of the photosphere has been studied. Magnetic synoptic maps of the 2007 Kitt Peak Observatory were...     

On the solution of the reverse problem of geodesics with the help of the chord

Резюме Дается вывод формул для вычислений длины хорды, длины и азимутов нормаляных сечений и длины геодезической линии эллипсоида. Применяются тригонометрические функции данных величин и постоянные принятого ргфгргнц-эллипсоида, что является целесообразным при использовании вычислителQjных машин, особенно автоматов. Рабочие формулы рекомендуются в форме (8–11).

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Dedicated to Professor František Fiala on His 85th Birthday

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Address: Veveři 95, Brno.     

On the gravimetric undulations of the geoid and the deflections of the vertical

Summary The author mentions the aims of the World-wide gravity project he established in the Ohio State University in Columbus, in 1950. He outlines the practical procedure of the gravimetric computations of the undulationsN and the vertical deflection components and and emphasizes that only by the global international cooperation and additional gravity observations at sea carried out during the last decade it has been possible to gather to Columbus the needed gravity material. Since there exist still large gravimetrically unsurveyed areas it is of vital significance to study what gravity anomalies are best to be used for these regions. The given figures concerning the accuracy of theN, and , estimated theoretically and obtained in practice, indicate that in the gravimetrically well surveyed parts of the world like in Europe and the United States we can get gravimetrically on basis of existing gravity material theN-values with accuracy of about 5–10 meters, and and with the accuracy of about 1. The geoid undulationsN are already computed in Columbus for more than 6000 points of the northern hemisphere. The sample maps show the interesting geoid of Europe and vicinity between the latitudes 60° and 30° and longitude 5° W and 30° E, drafted on basis of more than 1000N-values computed at the corners of 1°×1° squares. It is interesting to realize that the geoid undulations in all this area are positive, the extreme values being between 40 and 50 meters. The geophysical significance of the geoid maps of this kind is pointed out.     

The effect of the pollution of the ground layer of the atmosphere on the albedo

Summary A simple model is proposed suitable for studying the effect of the ground layer of the atmosphere, polluted by aerosol, on the albedo. This model is founded on solving the equation of transfer of radiative energy. The numerical results are discussed, particular attention being paid to the analysis of errors due to neglecting the multiple reflection of solar radiation on the aerosol particles. A method which would also include the multiple reflection is proposed, and the conditions under which the presence of the aerosol is responsible for an increase or decrease of the solar radiation balance on the Earth's surface, are analysed.     

On the determination of the non-linearity of the gravimeter scale

Summary The results of two different methods of the determination of the non-linearity of the gravimeter scale are compared; the economy is discussed as well.     

On the maintenance of the axisymmetric part of the flow in the atmosphere

Summary The maintenance of the axisymmetric component of the flow in the atmosphere is investigated by means of a steady-state, quasi-geostrophic formulation of the meteorological equations. It is shown that the meridional variations in the time-averaged axisymmetric variables can be expressed as the sum of three contributions, one being due to the eddy heat transport, another to the eddy momentum transport, and a third to the convective-radiative equilibrium temperature which enters the problem through the specification of a Newtonian form of diabatic heating. The contributions by the large scale eddies are evaluated through the use of observed values for the eddy heat and momentum transports.The contributions from each of the three forcing mechanisms to the temperature and zonal wind fields are invstigated individually and found to be of about equal importance. The sum of the three contributions are also presented for the temperature, the zonal wind, the stream function associated with the mean meridional circulation and the corresponding vertical motion. Although the results fail to reproduce the main observed features of the lower stratosphere, they are found to be in good agreement with observations in the middle latitude troposphere. At any pressure level, for example, the computed mean zonal wind has a jet-like profile and the axis of the jet is found to slope to the south with height, as observed in the atmosphere.Based in part on a thesis submitted by the first author as partial fulfillment of the requirements for the Ph.D. degree at the University of Michigan. — Publication No. 194 from the Department of Meteorology and Oceanography, The University of Michigan.