OALib Journal期刊

ISSN: 2333-9721




2018 ( 24 )

2017 ( 23 )

2016 ( 38 )

2015 ( 83 )


匹配条件: “0 earthquake” ,找到相关结果约2967条。
Locating the Focus of a Starting Earthquake  [PDF]
Alexander Ivanchin
International Journal of Geosciences (IJG) , 2014, DOI: 10.4236/ijg.2014.510096
Abstract: This article describes a method of locating the focus of a starting earthquake based on the use of the elastic interaction energy. The method allows determining the focus location and its energy class as well as evaluating the stresses caused by it and observing its evolution.

Shi Xiang,Ran Yongkang,Chen Lichun,Wang Hu,Liu Ruichun,

第四纪研究 , 2009,
Abstract: 龙门山断裂带是否存在类似汶川5.12大地震的地质记录,是地震科学工作者所关注的科学问题之一.处于中央断裂带中段和北段分界地区的北川一邓家一带,古地震研究对认识整个龙门山断裂带的大地震复发特征有重要意义.沿北川-邓家地震地表破裂带,可能有过早期活动,并兼顾是否有较多细粒第四纪沉积物,以便能较清晰地分析、判断古地震事件以及采集测年样品,所以我们在沙坝1组、和尚坪和邓家海光6组等3个地点开挖了4个探槽,并进行了断错地貌的实测,发现了该地区明显的古地震遗迹,以及该地区特殊的正断层地表破裂样式.通过探槽和实测地貌情况与前人在龙门山中央和前山断裂带的古地震研究结果的对比分析,结果显示该地区至少发生过两次地震事件(包括5.12地震事件在内),与龙门山中央和前山断裂大部分地点已揭露的古地震事件相吻合.而通过对该地区地貌侵蚀特征与地震陡坎的高度变化分析,可以得出该地区之前的地震事件与5.12地震的大小相近.
Imminent very strong infrasonic wave precursor received before the earthquake of magnitude M=9.0, 26th Dec. 2004 of Indonesia

LI Junzhi,CHENG Weisheng,XIA Yaqin,

地球物理学进展 , 2006,
Abstract: Before the earthquake of M=9.0 happened on 26th,Dec.2004 in Indonesia,a very strong infrasonic sound wave with a sound press being of 16.8Pa was received on 3:22 pm,19th,Dec.2004,which shows that a great earthquake should happen in the world shortly based on our experiences.We made an informal imminent forecasting that earthquakes with magnitude greater than Ms=8.1 should occur during 19th to 28th,Dec.2004 in the world.
The Research on Earthquake Radon Anomalies  [PDF]
Liangquan Ge, Jiankun Zhao, Yaoyao Luo
Journal of Geoscience and Environment Protection (GEP) , 2014, DOI: 10.4236/gep.2014.25006

Radon is considered to be one of the most promising gases to predicting the earthquake. The water radon concentration is regular to monitoring indicator. The research on the formation of the earthquake radon anomalies (ERA) will produce great academic value and economic benefits. The ERA in slope-type can be seemed as a response of underground water radon anomalies in the progress of tensile stress accumulating.

Seismic activity of the earth, the cosmological vectorial potential and method of a short-term earthquakes forecasting  [PDF]
Baurov Yury Alexeevich, Baurov Alexey Yur’evich, Baurov Alexandr Yur’evich (Jr.), Spitalnaya Alexandra Alfredovna, Abramyan Ara Arshavirovich, Solodovnikov Vladimir Alexandrovich
Natural Science (NS) , 2011, DOI: 10.4236/ns.2011.32016
Abstract: To the foundation of a principally new short-term forecasting method there has been laid down a theory of surrounding us world’s creation and of physical vacuum as a result of interaction of byuons-discrete objects. The definition of the byuon contains the cosmological vector-potential Ag- a novel fundamental vector constant. This theory predicts a new anisotropic interaction of nature objects with the physical vacuum. A pe- culiar “tap” to gain new energy (giving rise to an earthquake) are elementary particles because their masses are proportional to the modulus of some summary potential A∑ that contains po- tentials of all known fields. The value of A∑ cannot be larger than the modulus of Ag. In ac- cordance with the experimental results a new force associated with A ejects substance from the area of the weakened A along a conical formation with the opening of 100° ± 10° and the axis directed along the vector A∑ . This vector has the following coordinates in the second equatorial coordinate system: right ascension α≈ 293°± 10°, declination δ≈36° ± 10°. The 100% probability of an earthquake (earthquakes of 6 points strong and more by the Richter scale) arises when in the process of the earth rotation the zenith vector of a seismically dangerous region and/or the vectorial potential of Earth’s magnetic fields are in a certain way oriented relative to the vector Ag. In the work, basic models and standard mechanisms of earth- quakes are briefly considered, results of proc- essing of information on the earthquakes in the context of global spatial anisotropy caused by the existence of the vector Ag, are presented, and an analysis of them is given.
Re-Evaluations of Seismic Hazard of Syria  [PDF]
Hatem M. El Ssayed, Hussam E. Zaineh, Draji Dojcinovski, Vladimir Mihailov
International Journal of Geosciences (IJG) , 2012, DOI: 10.4236/ijg.2012.324085
Abstract: Seismic Hazard analysis requires geologic, seismologic and geophysical data to be applied in a certain area. There are several studies were established to estimate the seismic hazard of Syria. In this study, the authors integrated the historical, instrumental seismological data, the structural-geological data of Syria and the subsurface tectonic map of Syria to re-evaluate the seismic hazard of Syria. The current research introduces new seismic source models which were not used before. The source models were chosen according to the structural and tectonic setting of the study area. The recurrence relationship was applied for each source for obtaining the regression coefficients related to each seismic source. Finally, the seismic hazard maps were plotted for (50, 100, 200, 475, and 1000) return periods by using Poisson probabilistic method. Regarding with theses resulted maps, there is obvious increase of the seismicity from the eastern parts of Syria to the western parts which reaches to its maximum value in El-Ghab region.
Advantages of GNSS in Monitoring Crustal Deformation for Detection of Precursors to Strong Earthquakes  [PDF]
Guohua Gu, Wuxing Wang
Positioning (POS) , 2013, DOI: 10.4236/pos.2013.41003

Earthquake predictions inChinahave had rare successes but suffered more tragic setbacks since the Xintai earthquake in 1966. They have developed with twists and turns under the influence of the viewpoint that earthquakes are unpredictable etc. Though the Wenchuan earthquake of M8.0 in2008 inChina and the 2011 Tohoku earthquake of M9.0 inJapan were failed to predict, the GPS observations before and after these 2 events have shown that there were precursors to these events and large earthquakes are predictable. Features of different observation techniques, data processing methods are compared and some recent studies on precursory crustal deformations are summarized, so various advantages of GPS technique in monitoring crustal deformation are emphasized. The facts show that anomalies or precursors detected from GPS observations before the great Wenchuan earthquake have been the most remarkable results of explorations on crustal movements and earthquake precursors in China. GPS is in deed an excellent observation technique for earthquake prediction.

Variation of Altitude Observed on the Occasion of the Tohoku Earthquake (M = 9.0) Occurred on March 11, 2011  [PDF]
Pietro Milillo, Tommaso Maggipinto, Pier Francesco Biagi
Open Journal of Earthquake Research (OJER) , 2014, DOI: 10.4236/ojer.2014.31004

Since October 1, 2010, a GPS receiver is put into operation at Tokai (Japan) in an experiment on Neutrino Physics (T2K). A significant variation of the altitude was detected from the beginning of March 2011, so that it has made worthwhile to investigate the possibility that such variations could be correlated to the Tohoku earthquake. In order to investigate in details this possibility, we analyzed the GPS data collected during 2011 by GEONet the GPS Earth Observation Network (GEONET). GEONET is the GPS network of Japan and consists of 1240 permanent stations. Preliminary results of the analysis seemed to show ten days before the earthquake, some possible anomalous behaviors of the stations. These anomalous behaviors were particularly relevant for stations of the network near the epicentral area. While co-seismic and post-seismic variations are widely expected, the anomalies recorded about ten days before the earthquake could be seriously considered among short-term precursors of the earthquake. In order to confirm this possibility, more detailed studies have been performed. In particular, GEONET currently makes available only daily solutions of the stations coordinates. On the contrary, it is very important to improve the time resolution just to understand the features of the anomalies till the last hours before the Earthquake. For this reason, we have performed an analysis to evaluate the coordinates and movement on hourly basis so improving the time resolution.


Cai Shan,Zhang Jingfa,Chen Wenkai,Zhang Lei,Dai Yaqiong,

大地测量与地球动力学 , 2009,
Abstract: Through remote sensing(RS) the damage information of a large area can be obtained in spite of traffic condition,so using remote sensing data to map seismic intensity distribution is of great advantage.Seismic intensity distribution is mapped on the basis of the Chinese Seismic Intensity Scale by analyzing the damage of constructions,roads and bridges,and earthquake-induced geological disasters.Finally,experiences and problems of mapping seismic intensity distribution by RS data are summarized.

大地测量与地球动力学 , 2009,
Abstract: 利用川西地区1990-1997年、1997-2003年及1994-2006年区域水准观测资料,借助负位错反演,研究汶川Ms8.0地震与攀枝花Ms6.1地震前相关及周边断裂的构造变形特征与应变积累背景.分析表明:安宁河断裂北段与鲜水河断裂南段及与龙门山断裂交汇区附近显示与继承性运动背景一致的大范围、显著隆升和长时间尺度(10数年)应变能积累特性,对汶川大震有一定程度反映;而元谋-绿汁江断裂南段1997-2003年应变积累加速特征可能对攀枝花地震有一定程度反映.

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