共查询到20条相似文献，搜索用时 140 毫秒
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我们在１９９２年研制完成了ＭＤ－２型磁变仪数据采集记录系统，它在ＭＤ－１型的基础上进一步改进和增强了系统性能。ＭＤ－２型配接俄罗斯的磁变仪，已在南极和北京以及俄罗斯的部分台站投入使用。它的研制应用大大提高了地磁测量数据的质量和处理速度，实现了台站记录设备的更新换代。 相似文献
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介绍了为俄罗斯石英光电磁变仪配接的ＭＤ－２型磁变仪数据采集系统的设计、性能特点，及其与俄磁变仪组成的数字磁变仪系统在北京地磁中心台完成数字化记录的应用结果． 相似文献
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本文介绍了石英光电磁变仪及其数字化采集，记录的设计和实现，并讨论了数字磁变仪系统在地磁台站的应用结果。 相似文献
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朱兆才 《地震地磁观测与研究》1994,15(6):77-78
水平分量磁变仪的定向实验《地磁台站观测规范》规定水平分量磁变仪（以下称Ｈ仪），在磁偏角磁变仪安装后进行（因Ｄ磁针磁矩小，可忽略其影响认为Ｈ仪处在无磁环境），并用“扭头带动镜面法”（以下称△／△θ法）对Ｈ仪定向。然后安装之磁系、记下Ｚ磁系对Ｈ光点的影响... 相似文献
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利用成都台网速度量记录测定尾波震级的初步研究 总被引：1，自引：1，他引：1
利用成都遥测地震台记录和实量处理系统记录，初步建立了１４个子台速度量记录持续时间测定近层波震级的经验公式ＭＤ＋Ｄ０＋Ｃ１ｌｏｇτ＋Ｃ２ｌｏｇ＾２τ并求得其中的系数Ｃ０，Ｃ１和Ｃ２，使得ＭＤ与全川分析目录结果的地震震级ＭＬ相一致，由于持续时间测定的震级的大小与信号持续时间直接相关，并反映台站附近价质性质，与路径基本无关，不受记录限幅与否的影响，可提高震级测定精度。 相似文献
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苍山5.2级地震前电磁辐射异常 总被引：1，自引：0，他引：1
利用枣庄电磁信息台ＤＰＪ－Ⅲ、ＵＬＦ－Ⅲ及ＪＤ－０３型电磁辐射仪观测到的资料,分析了山东苍山５．２级地震前多数和台站记录到的异常信息及其特征。 相似文献
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美国ＴｅｒｒａＴｅｃｈｎｏｌｏｇｙ公司生产的ＤＣＳ－３０２数字地震仪原来配用ＳＳＡ－３０２力平衡加速度计，用于观测地震的近场地面运动加速度。本文设计了一套装在地震计与记录器之间的前置放大器，使ＤＣＳ－３０２记录器可与英国制造的ＷｉｌｌｍｏｒｅＭＫ３型动磁式地震计配用，既能记录近震，又能记录远震，扩大了ＤＣＳ－３０２数字地震仪的使用范围。文中给出了记录实例。 相似文献
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A. O. Alabi 《Surveys in Geophysics》1983,6(1-2):153-172
A review of experiments in which arrays of recording magnetometers deployed over an area of land to study induction problems is presented. Intensive array activities take place on a continual basis in North America, Australia, Scotland and Africa and array studies have been conducted in India, Scandinavia, and Russia. The main results are summarised. Analysis, presentation and interpretation of array data have also enjoyed significant developments which are discussed with illustrations. The use of multi-techniques in the analysis of array data has improved the reliability of the interpretational inferences. One-dimensional conductivity profiles can now be deduced by the simple inversion of the inductive response functionC(w, t) estimated from the vertical field Z and spatial gradient of the horizontal field components (ΔX/Δx+ΔY/Δy) of magnetometer array data with large gradient. Bounds can be placed on accepted profiles using the Monte Carlo process just as it is done in magnetotelluric data inversion. The results from array studies continue to improve our understanding of the synthesis of realistic tectonic models of the continents. The structure under some geothermal zones are now known through a number of recent studies. 相似文献
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Data on the rivers of Onega, Ponoi, and Tuloma have been used to study whether the land surface model SWAP can serve as a
tool to reproduce many-year series of daily runoff hydrographs of rivers in Northern Russia. The input data for the model
have been derived from observational data from weather stations and global databases. It has been considered whether the model
parameters obtained for one river can be used for calculations for other rivers where no data on appropriate parameters are
available. 相似文献
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The parameters of earthquakes in northeast of Russia that occurred in 1735–1910 and were published in New Catalog of Earthquakes in USSR from Ancient Times trough 1975 have been specified based on the initial data presented (1977). Special attention has been paid to the conformity between the initial data, the available solution methods, and the resulting parameter values. The macroseismic data from the preinstrumental and instrumental observational periods have been compared. 相似文献
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The methodological and technical guidelines for setting up seismic event recording stations in Russia’s Far North are presented. The main types of recommended seismic instruments and data-acquisition and transmission methods are discussed. 相似文献
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An automated hardware-software station was designed at the Institute of Physics of the Earth (Moscow, Russia) for the continuous monitoring of a low-frequency electromagnetic background in a low atmosphere. The electromagnetic signal is processed in real time and an attempt is made to find and confirm the possible precursors of earthquakes. The basic concepts of electromagnetic earthquake precursors are described, as well as a technique of data recording and processing for obtaining the most accurate prediction. The design of the station is based on up-to-date hardware components and can be integrated with additional detectors if necessary. It is assumed that stations can be combined within monitoring networks of different scales. The net cost of the station is relatively low because only mainstream components are used. 相似文献
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Thermomagnetic curves have been obtained for samples from 25 granites and gneisses in Georgia, South Carolina, and North Carolina. This data set can be divided into two distinct curve types: Type I includes rocks which exhibit no distinct Curie points and a linear decrease in magnetization with increasing temperature; Type II curves exhibit a distinct Curie point over a range of temperatures expected for magnetite (500–580°C). Synthetic samples constructed from magnetite and hematite powder exhibit Type I behavior when the hematite to magnetite ratio is high (e.g. 15 : 1). Examination of polished sections shows relatively coarse-grained magnetite only in Type II rocks. We interpret our data to indicate that Type I thermomagnetic curves are dominated by relatively large hematite/magnetite ratios while Type II granites are characterized by relatively coarse-grained magnetite. Type I granite samples have low magnetic susceptibility values (less than 4 × 10?4 cgs) while most Type II granite samples have higher values. The Type I granites are invariably18O-enriched whereas Type II granites typically exhibit low18O/16O ratios. These relationships are consistent with previously reported correlations of susceptibility (generally indicative of magnetite content) and oxygen isotopic trends in the southern Appalachian Piedmont. 相似文献
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受供电和数据传输方式的影响,十堰地震台测震系统数据断记时间较长,数据质量较差。为此,采用3路交流供电自动切换辅助2路直流供电方式,为仪器运行提供稳定的电力供给,并采用一主一备有线光纤传输解决微波单线传输的弊端。为验证解决措施的有效性,选取该台2009—2020年测震记录,统计SEED格式波形记录数据断记时长,结果发现,在2013年进行整改以来,数据断记现象减少,断记时长明显缩短。选取该台2015—2021年测震系统仪器更换以来的数据记录,分析地方震、近震、远震和极远震震相特征,发现该台记录地震波形清晰、可靠。可见,该台数据断记整改措施得到有效检验,测震系统运行质量得到提升,可为国内同类测震台站提供参考。 相似文献
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Geomagnetism and Aeronomy - Vertical and oblique sounding data for northeastern Russia have been used to analyze the conditions for the propagation of radio waves during weak geomagnetic storms... 相似文献