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1.
中国地震局监测预报司 《国际地震动态》2009,(7):1-1
为推进地震前兆观测技术和分析预报方法创新,广泛听取各方面对我国地震预报发展的意见和建议,中国地震局监测预报司与中国地震局地球物理研究所、地震预测研究所、中国地震学会电磁专业委员会于2008年11月29—30日在北京联合举办了“地震电磁波前兆观测技术与分析预报方法论坛”。 相似文献
2.
年度地震重点危险区是指一年内可能发生地震,应强化跟踪、力争作出震前有效预报的地区.通俗的意义指地震发生可能性比较高的地区.一般由中国地震局监测预报司每年年底根据预报专家的年度会商结果划定. 相似文献
3.
甘肃省民乐6.1级地震短期预报的简要回顾与启示 总被引：1，自引：0，他引：1
2003年10月25日，甘肃民乐—山丹交界发生了Ms6．1地震。震前，在中国地震局监测预报司和分析预报中心的领导和指导下，甘肃省地震局于9月20日提出了祁连山中东段地区短期内可能发生6级左右地震的预报意见，并采取了多种短临跟踪措施。 相似文献
4.
与地震的孕育和发生相关联的大量电磁学观测与研究已初步证实了孕震过程中的电磁现象是客观存在的.例如,以中国地震局为核心,在全国范围内布设了各类电磁台网,积累了不少宝贵的观测资料和震例;日本为了对希腊学者所主张的利用地电方法来预报地震这种尚有争议的热门问题进行检验,同时也为了准确地捕捉地震孕育过程中的各种电磁现象的变化信息,以位于中部的东海地区为核心建起了一个世界上最稠密、最先进的数字化遥测电磁观测台网,不少台站可同步记录地电流、ULF(ultra-low-frequency)磁场,有的通过数个研究群体的合作可记录覆盖DC/ULF-VHF(very-high-requency)频段的不同频率的电磁波的变化,迄今已积累了一些宝贵的观测资料,并且取得了一些有创意的研究成果;台湾也启动了一项重大研究计划,其中一个重要的内容就是在台湾岛内布设一些数字化电磁仪,以监测地表附近电磁场的演变;法国则即将发射世界上第一颗专门用于地震监测的电磁探测卫星(DEMETER). 相似文献
5.
兰州观象台(兰州基准地震台)始建于1953年,50年来已发展成为具有测震、电磁、形变、地下流体、热红外遥感等综合性国家基准地震台.兰州观象台在观测工作中取得了多项全国资料评比前三名.四次被中国地震局评为监测预报先进集体,一位同志被中国地震局评为地震系统科技新星,一位同志被中国地震局评为监测预报先进个人.获中国地震局科技进步和防震减灾优秀成果奖八次.同时在开展国际合作项目方面取得了突出的成绩. 相似文献
6.
地震前的电磁扰动现象曾被多次观测到, 但需进一步研究。 在中国地震局的支持下, 可以监测电磁扰动数据的多分量地震监测系统AETA在中国境内已经布设了200余套。 2017年8月8日, 四川省九寨沟县发生7级地震。 震中周边500 km范围内当时已经布设22套AETA设备。 基于滑动四分位距法(时间窗为27 d)分析了这些台站震前30 d的数据。 11个台站出现了异常, 其中震中周边200 km内的6个台站有4个发生异常。 同时, 正异常明显多于负异常。 另外, 大部分异常发生在夜间(20时~6时)。 相似文献
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中国地震学会地震预报专业委员会 《国际地震动态》2007,(12):34-36
中国地震学会地震预报专业委员会和安徽省地震局于2007年5月22—25日在安徽合肥联合举办数字地震资料研究与应用研讨会暨第七届地震预报专业委员会成立大会。会议内容包括第七届地震预报专业委员会成立、数字地震研究与应用以及地震预测新技术和新方法研讨。来自中国地震局、有关直属单位、各省市地震局、北京大学、上海大学等29个单位70余名代表参加了会议。中国地震局原局长陈章立,中国地震局监测预报司车时副司长,中国地震局监测预报司预报处李永林副处长,安徽省地震局张鹏局长、姚大全副局长,中国地震学会理事长张国民研究员、地震预报… 相似文献
9.
低频电磁波在汶川强余震时的同震效应 总被引：1，自引：0，他引：1
电磁扰动观测是开展地震监测预报的一种新方法,在汶川Ms8.O地震余震中,陇南汉王架设ELF观测到了电磁同震现象,通过汉王地震台强震资料对照发现,磁场分量与地震波到达同步,但电场分量反映不够明显. 相似文献
10.
2012年11月8日,山西省地震学会特邀预报中心范雪芳高级工程师做了题为"中条山断裂断层氢的初步实验"学术报告.预报中心、监测信息中心等单位的科技人员20余人听取了报告.报告会由监测预报处薛振岳处长主持.
"中条山断裂断层氢的初步实验"是中国地震局地震科技星火计划项目,报告介绍了中条山断裂断层氢观测实验的测点布设、测点装置建设、实验结果等情况,分析探讨了氢观测技术在预报中的应用.与会人员还就报告中观测实验等相关问题进行了交流和讨论. 相似文献
11.
The geomagnetic data recorded by Kashi and Jinghai observatories in China were analyzed with improved polarization method. We compared the result around 0.01 Hz which is thought to be useful to detect the ULF anomaly with the result around 0.1 Hz which was inferred from the earthquake depth according to the skin effect, and found that 0.1 Hz is more proper to detect the ULF anomaly for both earthquakes studied in this paper. 相似文献
12.
The characteristics of 80 geomagnetic storm spectra have been analyzed and compared for the records at seven observatories:
Beijing, Qingguang, Changli, Guangzhou, Sheshan, Wuchang and Changchun during 1973–1977. The general natures of the spectra
are thus obtained. The results are as follows. First, there are synchronous trends of change in the magnetic storm spectral
amplitude at the seven observatories. Second, the sepctral slopes of all the magnetic storms are almost the same. The yearly
average values of the spectral slopeb are quite steady within the period range from 0.5 to 6.8 hours. This means that the magnetic storms have the same energy
partitioning factor. Third, there are significant changes in the yearly average values of spectral interceptsa for the three observatories of Beijing, Qingguang and Changli which are near the Tangshan earthquake area, but the values
are quite steady for the four observatories of Guangzhou, Sheshan, Wuchang and Changchun which are far from the earthquake
area. It seems that the noticeable changes are related to the great Tangshan earthquake of July 28, 1976. 相似文献
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ZHANG Yan-hui LI Shi-wen WENG Ai-hua ZHANG Su-qin YANG Yue LI Jian-ping TANG Yu 《地震地质》2019,41(4):979-995
Geomagnetic depth sounding is an effective method for exploring deep structure of the earth. There are dense geomagnetic observatories in China, which lays a foundation to obtain the electrical structure of the transition zone and the upper part of the lower mantle beneath China. However, the corresponding C-responses estimation methods which are applied now cannot get the stable C-responses for many observatories. Thus, a large amount of geomagnetic data is wasted. Therefore, in order to make full use of the geomagnetic data, the estimation of C-responses needs to be systematically studied. Because of the heterogeneous characteristics of the data quality of China's geomagnetic observation data, such as the quality of the data, the length of the record, the types of data(absolute and relative observation)and data discontinuity condition, many geomagnetic data are abandoned, this limits the resolution of mantle electrical structure studies. In this paper, the following techniques are used to improve the stability of the data and increase the number of the available geomagnetic observatories, in the meantime, the stability of the C-responses curves can be effectively improved:1)obtaining the stable spectrums of the different components for each frequency by the BIRRP(Bounded Influence, Remote Reference Processing)software, and using the global smoothing technique to suppress data noise on geomagnetic data; 2)As for the geomagnetic data which only records the relative variation of the D, H and Z components and doesn't have the baseline value, the horizontal component is decomposed by the approximate estimation method to obtain the C-responses of the relative variation data, and then the relative variation data is used directly for the C-responses estimation; 3)the effects of discontinuous data and short-record data on C-responses estimation are discussed. Under normal conditions, the discontinuity of the data has little influence on C-responses, and when the data length is shorter than 5 years, we can hardly get the available C-responses whose periods are longer than 40 days. All these experiments can provide a basis for the data processing of these kinds of observation data; 4)for coastal observatories, the ratio method is used to eliminate the influence of ocean effect on the C-responses functions. After carefully processing the data of more than 100 geomagnetic observatories in China by the above techniques, the stable C-responses function of 42 observatories is finally obtained, among them, the number of the observatories with C-responses ranging from 1.3 to 113.7 days is 24, and the observatories with C-responses ranging from 1.3 to 42.6 days are 18. The techniques of this paper can process heterogeneous data well and obtain more stable C-responses, which provides more basic data for high-resolution geomagnetic depth sounding inversion researches in China. 相似文献
15.
强震前地磁垂直分量日变化异常主要表现在幅度与相位上的变化.利用中国地磁台网多年观测资料,研究了2008年5月12日四川汶川8.0级地震前,地磁垂直分量日变极小值出现的时间(低点时间)在空间分布上的异常特征,即低点位移现象;并用此方法预测了汶川8.0级地震6级余震平静2个月后的一组6级强余震.这种少见的异常现象与强震发生有较好的相关性.发震日期为异常出现后的第27天或第41天的前后4天,强震发生地区在低点位移突变分界线附近.此外,还研究了汶川8.0级地震临震前,震中周围出现的地磁日变幅异常现象. 相似文献
16.
There are many reports about the abnormal electromagnetic signals observed before great earthquakes. In particular, the signals of electromagnetic anomalies before the Hyogo-Ken Nanbu, Japan, MS=7.2 earthquake on January 17, 1995 (Hayakawa, et al, 1996) and those before the Loma Prieta, USA, MS=7.1 earthquake on October 19, 1989 (Fraser-Smith, et al, 1990) are especially remarkable. However, what the above authors reported are only the phenomena of one or two observatories. In order to … 相似文献
17.
地倾斜固体潮所反映的地震之前应变积累异常信息 总被引：3，自引：0，他引：3
各不同地点地倾斜固体潮分潮振幅变化能反映出局部地区在应力场附加应力作用下所产生的介质应变变化和应变积累.本文通过对泰安台、马陵山台以及余山台地倾斜NS分量资料的调和分析,分别发现M2分潮振幅值与1983年菏泽地震（5.9级）及1984年南黄海地震（6.2级）有关的震前应变积累异常变化情况. 相似文献
18.
Network of seismo-geochemical monitoring observatories for earthquake prediction research in India 总被引：2，自引：0，他引：2
Hirok Chaudhuri Chiranjib Barman A. N. Sekar Iyengar Debasis Ghose Prasanta Sen Bikash Sinha 《Acta Geophysica》2013,61(4):1000-1025
Present paper deals with a brief review of the research carried out to develop multi-parametric gas-geochemical monitoring facilities dedicated to earthquake prediction research in India by installing a network of seismo-geochemical monitoring observatories at different regions of the country. In an attempt to detect earthquake precursors, the concentrations of helium, argon, nitrogen, methane, radon-222 (222Rn), polonium-218 (218Po), and polonium-214 (214Po) emanating from hydrothermal systems are monitored continuously and round the clock at these observatories. In this paper, we make a cross correlation study of a number of geochemical anomalies recorded at these observatories. With the data received from each of the above observatories we attempt to make a time series analysis to relate magnitude and epicentral distance locations through statistical methods, empirical formulations that relate the area of influence to earthquake scale. Application of the linear and nonlinear statistical techniques in the recorded geochemical data sets reveal a clear signature of long-range correlation in the data sets. 相似文献
19.
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20.
作者对我国各省(直辖市、自治区)地震局在因特网上运行的信息网站进行了浏览,搜集了这些网站在地震数据服务方面的信息,从地震数据共享的角度,对我国省级地震局的因特网地震数据服务状况进行了分析。本文概要介绍分析结果,并对进一步发展因特网上的地震数据服务提出若干建议。 相似文献