共查询到20条相似文献，搜索用时 78 毫秒
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太平庄观测井是一口有十几年观测资料并有几次较好震例的综合观测井。近年来 ,由于地下水的大量开采 ,使得地下水位大幅度下降 ,尤其是观测井周围地热的开采 ,对太平庄观测井的正常动态影响较大。文中结合往年较正常的动态特征和地质构造等 ,分析了太平庄观测井的水位、水温、逸出气和断层气等的年动态变化特征。结果表明 :水位、水温的变化规律受观测井水位补给区降雨量的影响 ,水温还受当地降雨量的影响 ,特别是太平庄观测井周围新井的抽水对水温、水位、逸出气均有一定影响。由于观测井受诸多因素的影响 ,导致太平庄观测井的观测资料不能按往年的变化规律进行动态分析。在排除了降雨和人为的干扰因素外 ,太平庄观测井的资料动态趋势还可用于首都圈的震情预测 相似文献
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我国地下水动态预报地震的进展 总被引：1，自引：0，他引：1
地下水动态清理攻关组 《中国地震》1985,(1)
本文是全国地下水动态观测清理攻关工作的综合报告。自1979年以来逐渐形成的“深浅结合、点面结合、控制活动构造进行应力—应变场观测”的地下水动态观测井布网原则,以及在此原则指导下部署的国家井网是行之有效的。对当前我国的地下水位观测仪器、观测井网的建设及评价、地下水位动态的影响因素以及用地下水动态预报地震的效能等方面做了较为全面的讨论。 相似文献
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地下水汞观测中干扰因素的实验研究 总被引：1，自引：0，他引：1
本文通过对水中汞量测定过程中，可能出现的干扰因素进行了有关试验和讨论，提出了使用的浓硫酸试剂是干扰因素的主要来源，进行水样的空白测定的消除综合干扰，提高观测质量的重要措施。 相似文献
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文章概述了汕头东山湖高热水化学观测井的地质、水文地质等环境条件，并据实测资料分析认为，该井是震兆反映较灵敏的进中孔，其水化学灵敏震兆组分为Cl^-、HCO3^-、He、H2等多项组分。 相似文献
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补给和排泄对井水位变化影响的定量分析 总被引：1，自引：0，他引：1
根据唐山开平向斜西北翼奥陶系石灰岩水层的水文地质条件，按地下水均衡计划原理计算了含水层地下水的补给量，由补给量和排泄量分析了含水层水位变化幅度。选取水位变化幅度较大时段对湖北省地震局０５井和０８井进行了计算，比较值与观测值，相差无几，表明水位经值是含水层水层补给和排泄条件变化引起的。 相似文献
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D. M. Pechersky A. A. Lyubushin Z. V. Sharonova 《Izvestiya Physics of the Solid Earth》2010,46(7):613-623
The data on geomagnetic reversals are compared with the changes in the organic world and with the lower-mantle plumes. The
times of the formation of plumes and the times of their appearance on the Earth’s surface relate to the intervals characterized
by the different frequencies of geomagnetic reversals, i.e., there is no interrelation between the formation of plumes and
the frequency of the changes in the geomagnetic field polarity. At the same time, a certain synchronism is observed between
the frequency of the geomagnetic reversals and the boundaries of the biostratigraphic ages, i.e., the changes in the organic
world in the long-period range. A hypothesis is proposed, which explains the change in the sign of the geomagnetic field by
the combined effect of the irregular rotation of the internal core relative to the mantle and the changes in the slope angle
of the axis of the Earth’s rotation, which, in turn, results in synchronous events on the Earth’s surface: the rates of changes
in the organic world. 相似文献
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The nutations of the planets Mars andEarth are investigated and compared. Alarge number of interior structureparameters are involved in the nutationcomputations. The comparison between the observations and the computationsprovides several constraints on these parmeters andtherefore allows a better understanding of the physics of the interior of theplanet. For the Earth, the high precision of the observations of the nutationshas led to a very good determination of interior properties of the planet. ForMars, observations of nutations are not yet available, and we review how theamplitude of the Martian nutations depends on the hypotheses consideredfor its interior. Although Mars is very similar to the Earth, its interior is not well known;for example, we don't knowif its core is liquid or solid. Only if the core is liquid,the Free Core Nutation (FCN) normal mode exists and can alter the nutationswhich are close to the resonance. From the observed geoids, it is known thatboth planets are not in hydrostatic equilibrium. The departure is larger forMars than for the Earth, and consequently, the implication of considering a convective mantle instead of a mantle in hydrostatic equilibrium described byClairaut's equation for the initial equilibrium state of the planet is largeron the Martian nutations than on the Earth nutations. The consequences of theuncertainty in the core dimensions are also examined and shown to be of a veryhigh influence for Mars if the core is liquid, due to the potential changes inthe FCN resonance. The influence of the presence of an inner core, which isknown to exist for the Earth, could be more important for Mars than for theEarth if the inner core is large. Due to the presence of Tharsis on Mars, thetriaxiality of this planet has, additionally, larger effects than on Earth. 相似文献
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综合APIA、HONOLULU、PAMATAI 3个地磁台三分量的11年周期变化的形态后,可定性地提出该变化源于内场。如内源为核幔边界的电涡流,则其中心点应位于3台之间。 相似文献
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As is known, the secular deceleration of the Earth's diurnal rotation is explained mainly by the tidal friction in the ocean. Below we consider this mechanism in some detail, taking into account also elastic deformations of the mantle under the action of ocean loading and the interaction between the tide-generating body, ocean tidal wave, liquid outer core, and solid inner core. It is shown that elastic displacements of the core-mantle boundary under the action of ocean loading are of about the same amplitude and phase as the elastic loading displacements of the Earth's outer surface. As a result, side by side with the mechanism of secular deceleration of diurnal rotation of the mantle, there are also (1) the opposite mechanism of secular acceleration of diurnal rotation of the outer liquid core and of the solid inner core and (2) the mechanism of excitation of differential rotation in the liquid core. Taking these effects into account, we compare theoretical and modern observed data on the eastward drift of the solid inner core. It is shown that the best agreement may be obtained if the turbulent viscosity of the liquid core is about 2 × 10
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Poise 相似文献
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The depth to the top of magnetic dykes can be estimated from total field aeromagnetic data using the relation between the depth to magnetic sources and the autocorrelation function of magnetic data. By using synthetic anomalies we show that in the ideal case, depth can be determined to an accuracy of 10% or better, when the anomaly sources are two-dimensional dykes. However, the estimated depths depend on the width of the dykes. The estimated depth is about 0.6 times the actual depth to the top of thin dykes, and around the true depth for thick dykes having width-to-depth ratio around 3. The depth is considerably overestimated for very thick dykes (e.g., contacts, which is a special case of the thick dyke). Thus, the autocorrelation method requires that the width-to-depth ratio of the dyke is estimated independently to correctly estimate the depths. Alternatively, it must be assumed that the width-to-depth ratio for the two-dimensional source body is between 1.5 and 4. 相似文献