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（陈锦标，沈萍，郑治真）Ａｐｐｌｉｃａｔｉｏｎｏｆｄｉｇｉｔａｌｉｍａｇｅｐｒｏｃｅｓｓｉｎｇｔｏｔｈｅｄｅｔｅｒｍｉｎａｔｉｏｎｏｆｓｐａｔｉａｌｄｉｓｔｒｉｂｕｔｉｏｎｏｆｅａｒｔｈｑｕａｋｅｓ￥Ｊｉｎ－ＢｉａｏＣＨＥＮ；ＰｉｎｇＳＨＥＮａｎｄＺ... 相似文献
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Geoeiectromagnetic signals related to earthquakes have been detected in China and many other countries.Problems concerning the mechanism of the electromagnetic emission and transportation still remain unsolved,although several models have been proposed.We consider that the theory of "electromagnetic missile emission" may be used to solve this problem,and thus develops the basic ideal of the Electro Magnetic Missile Emission(EMME)model of the emission of electromagnetic signals before earthquakes:pulse variation of the stress state causes the emission of electrons,or sudden flow of the fluid,in a certain direction along or near the fault which is located at the focus of an earthquake,forming a pulse electric current; this current accordingly produces a kind of slowly attenuated EM Wave(electromagnetic missile,which may be observed on the surface of the earth)in the perpendicular direction.In other directions these EM waves vanish quickly and cannot reach ground level. 相似文献
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ＡｎｅｗａｐｐｒｏａｃｈｔｏｎｕｍｅｒｉｃａｌｓｉｍｕｌａｔｉｏｎｏｆｓｏｕｒｃｅｄｅｖｅｌｏｐｍｅｎｔｏｆｅａｒｔｈｑｕａｋｅＣＨＵＮ－ＡＮＴＡＮＧ（唐春安）ＹＵ－ＦＡＮＧＦＵ（傅宇方）ＷＥＮＺＨＡＯ（赵文）ＣｅｎｔｅｒｆｏｒＲｏｃｋｂｕｒｓｔｓ... 相似文献
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Application of mechanical and statistical models to the study of seismicity of syn-thetic earthquake
《地震学报(英文版)》1998,(4)
Ａｐｐｌｉｃａｔｉｏｎｏｆｍｅｃｈａｎｉｃａｌａｎｄｓｔａｔｉｓｔｉｃａｌｍｏｄｅｌｓｔｏｔｈｅｓｔｕｄｙｏｆｓｅｉｓｍｉｃｉｔｙｏｆｓｙｎ－ｔｈｅｔｉｃｅａｒｔｈｑｕａｋｅｓａｎｄｔｈｅｐｒｅｄｉｃｔｉｏｎｏｆｎａｔｕｒａｌｏｎｅｓＹＡＯ－ＬＩＮＳ... 相似文献
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ＴｈｅａｐｐｌｉｃａｔｉｏｎｏｆｒｅｓｉｓｔｉｖｉｔｙｔｏｍｏｇｒａｐｈｙｔｏｈｙｄｒｏｇｅｏｌｏｇｉｃａｌｅｘｐｌｏｒａｔｉｏｎＲＵＩＦＥＮＧ１）（冯锐）ＸＩＡＯ－ＱＩＮＬＩ２）（李晓芹）ＹＵ－ＬＵＴＡＯ２）（陶裕录）ＣＩ－ＣＨＡＮＧＳＵＮ２）（... 相似文献
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《中国地震研究》1997,(3)
In this paper,the spatial linearity method is applied to synthetical processing of precursory data from different stations and different disciplines.The new characteristic value(a)obtained can describe the whole precursory field.The authors present the formulas for calculating spatial linearity.Furthermore,the spatial linearity method is applied to processing of geoelectrical resistivity and groundwater level data from 1970 to 1994 in North China.The results show that the new characteristic value(a)could detect the anomaly 1 year before moderately strong earthquakes. 相似文献
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Jiang Changsheng 《中国地震研究》2007,21(2):156-162
Considering the controversy over whether the Taipei 101 skyscraper has induced an increase of local seismicity, we reanalyzed the local earthquake catalogue before and after the construction to investigate whether the reported seismicity increase related to the construction is statistically significant. Statistical tests obtained a positive conclusion about the apparent seismicity increase. However, the calculation of maximum ΔCFS shows that at most a 2.2×10-4 bar Coulomb Failure Stress change was produced by the construction. Therefore, whether the construction of Taipei 101 really triggered the increase of seismicity still remains an open question: Statistically-yes; physically-no. 相似文献
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Application of observed strain steps to the study of remote earthquake stress triggering 总被引：1，自引：0，他引：1
IntroductionModernseismologysuggeststhatearthquakesarecausedbyfaultslippingtriggeredbytec-tonicstressesaccumulatedtoacertainextent;andthefaultslip,inturn,releasesstresses.Infact,whenanintensivequakeoccurs,thefracturingoftheseismogenicfaultdoesnotleadtothereleaseofallthestressesbut,accordingtothegeometricrelationsamongthefaults,releasesstressesonsomeofthefaultstomakethemmorestable,whileaccumulatesstressesonotherfaultstomakethemtendtoslip.Asanapproximation,thestrengthofthefaulttobeysByerleylawby… 相似文献
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Introduction EM technique of artificial SLF/ELF (Super low frequency/extremely low frequency, their frequency ranges from 0.1 to 300 Hz) can be used to investigate crustal conductivity structure. The SLF/ELF artificial signal is very stable and transmitte… 相似文献
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Application of caustic method to determining stress intensity factor of compressive shear crack 总被引：1，自引：0，他引：1
Introduction The caustics method has been introduced into seismology in recent years and preliminary in- vestigation indicates that it is effective to study the compressive stress (strain) of transparent sam- ples such as plexiglass (XU et al, 2001, 2002; Xu et al, 2000, 2002; XIONG et al, 2000, 2002). Especially, as a seismological concept, earthquake nuclei, becomes clearer according to the caustic shadow, which combines plastic area, nucleation area and crack concentration area together … 相似文献
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Introduction The study mainly focused on tidal information, i.e. earth tide in the continuous deformationdata processing and analysis before. And the analysis methods used were specially for earth tideonly. As to the medium-long period and non-tidal information, fitting and filtering are not the bestmethods. Because they are not able to reflect the variation process of frequency information withtime and to distinguish and extract more earthquake information, although they can eliminateyea… 相似文献
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《中国地震研究》1997,(2)
Considering two seismic parameters,energy and the frequency of an earthquake as a whole from the definition of information gain in entropy,we study the information gain of M≥6.0 earthquakes from the world earthquake catalogue during 1900-1992.The results show that the information gain decreases before strong earthquakes.Our study of the recent seismic tendency of large earthquakes shows that the probability of earthquakes with M≥8.5 is low for the near future around the world.The information gain technique provides a new approach to tracing and predicting earthquakes from the data of moderate and small earthquakes. 相似文献
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吴忠良 《地震学报(英文版)》2001,14(5)
It has been recognized for a long time that the b-value in the Gutenberg-Richters fre-quency-magnitude relation (Gutenberg, Richter, 1954) tends to decrease before some of the earth-quakes (LI, et al, 1979, and the references therein). Since the 1980s, study on b-value has caused much attention among seismologists and physicists when b-value was related to the fractal dimen-sion of an earthquake fault (Aki, 1981; King, 1983) and/or the scaling constant in the model of self-organized critical… 相似文献
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《中国地震研究》1994,(2)
Chinese seismologists have been coping with the challenging scientific problem of earthquake prediction,but now they are confronted with an even more challenging problem:figuring out a procedure of releasing a prediction to the public.In order to make the correct decision,in addition to the widely launched studies of seismic hazard and risk analysis,it is necessary to further study the social consequences of releasing an earthquake prediction to the public,and the possible economic cost of prevention countermeasures against earthquakes.It is also necessary to replace deterministic predictions by probabilistic predictions.Probabilistic prediction is a method well-suited for the prediction of chaotic seismic events.It can integrate the long-term risk estimate and short-term forecasting into a unified procedure,make quantitative analysis in decision-making on the release of predictions to the public,and achieve maximum beneficial social results of earthquake prediction. 相似文献
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Chang Hwan Lee Tae-Woong Kim Gunhui Chung Minha Choi Chulsang Yoo 《Stochastic Environmental Research and Risk Assessment (SERRA)》2010,24(3):389-397
Bivariate distributions have been recently employed in hydrologic frequency analysis to analyze the joint probabilistic characteristics
of multivariate storm events. This study aims to derive practical solutions of application for the bivariate distribution
to estimate design rainfalls corresponding to the desired return periods. Using the Gumbel mixed model, this study constructed
rainfall–frequency curves at sample stations in Korea which provide joint relationships between amount, duration, and frequency
of storm events. Based on comparisons and analyses of the rainfall–frequency curves derived from univariate and bivariate
storm frequency analyses, this study found that conditional frequency analysis provides more appropriate estimates of design
rainfalls as it more accurately represents the natural relationship between storm properties than the conventional univariate
storm frequency analysis. 相似文献
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Introduction Response of water level of borehole to micro-dynamic information such as seismic wave, solid tide and air pressure, etc, had been paid attention to long before and many researches had been carried out. It is concluded that abilities of micro-dynamic recording are different for differ-ent observation wells and even for the same well, responses to micro-dynamic information with different frequencies are different. Long-period events (precursors) before strong earthquakes are recorde… 相似文献
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Liu Xiqiang Zheng ZhizhenSeismological Bureau of Shandong Province SSB Ji'nan China Center for Seismic Data Information SSB Beijing China 《中国地震研究》1996,(4)
This paper briefly discusses the new methods that the authors have put forward to distinguish splitting shear-waves.By combining these new methods with other methods,the authors have processed the recorded data of an earthquake.The study results are consistent with each other. 相似文献