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Geological risk assessment of traffic engineering construction among 7.0-8.5 magnitude earthquake areas:Practice from the Sichuan-Tibet transport corridor in the eastern Tibetan Plateau
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作者 Ning Zhong Xian-bing Zhang +5 位作者 Chang-bao Guo Zhen Yang Hao Yu Rui-an Wu Yang Wang Hai-bing Li 《China Geology》 CAS CSCD 2024年第4期605-629,共25页
At least 13 active fault zones have developed in the Ya'an-Linzhi section of the Sichuan-Tibet transport corridor,and there have been undergone 17 MS≥7.0 earthquakes,the largest earthquake is 1950 Chayu MS 8.5 ea... At least 13 active fault zones have developed in the Ya'an-Linzhi section of the Sichuan-Tibet transport corridor,and there have been undergone 17 MS≥7.0 earthquakes,the largest earthquake is 1950 Chayu MS 8.5 earthquake,which has very strong seismic activity.Therefore,carrying out engineering construction in the Sichuan-Tibet transport corridor is a huge challenge for geological technological personnel.To determining the spatial geometric distribution,activity of active faults and geological safety risk in the Sichuan-Tibet transport corridor.Based on remote sensing images,ground surveys,and chronological tests,as well as the deep geophysical and current GPS data,we investigated the geometry,segmentation,and paleoearthquake history of five major active fault zones in the Ya'an-Linzhi section of the Sichuan-Tibet transport corridor,namely the Xianshuihe,Litang,Batang,Jiali-Chayu and Lulang-Yigong.The five major fault zones are all Holocene active faults,which contain strike-slip components as well as thrust or normal fault components,and contain multiple branch faults.The Selaha-Kangding segment of the Xianshuihe fault zone,the Maoyaba and Litang segment of the Litang fault zone,the middle segment(Yigong-Tongmai-Bomi)of Jiali-Chayu fault zone and Lulang-Yigong fault zone have the risk of experiencing strong earthquakes in the future,with a high possibility of the occurrence of MS≥7.0 earthquakes.The Jinsha River and the Palong-Zangbu River,which is a high-risk area for geological hazard chain risk in the Ya'an-Linzhi section of the Sichuan-Tibet transport corridor.Construction and safe operation Ya'an-Linzhi section of the Sichuan-Tibet transport corridor,need strengthen analysis the current crustal deformation,stress distribution and fault activity patterns,clarify active faults relationship with large earthquakes,and determine the potential maximum magnitude,epicenters,and risk range.This study provides basic data for understanding the activity,seismicity,and tectonic deformation patterns of the regional faults in the Sichuan-Tibet transport corridor. 展开更多
关键词 earthquake belt active fault PALEOearthquake Seismicity earthquake landslide Sichuan-Tibet transport corridor Tectonic deformation pattern Stress distribution Geological disater survey engineering Remote sensing survey
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Astronomic background of global huge earthquakes at beginning of 21st century
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作者 Hu Hui Su You-Jin 《Applied Geophysics》 SCIE CSCD 2024年第3期423-432,616,共11页
Since the beginning of the 21st century,major earthquakes have frequently occurred worldwide.To explore the impact of astronomical factors on earthquakes,in this study,the statistical analysis method of correlation is... Since the beginning of the 21st century,major earthquakes have frequently occurred worldwide.To explore the impact of astronomical factors on earthquakes,in this study,the statistical analysis method of correlation is used to systematically analyze the effects of astronomical factors,such as solar activity,Earth’s rotation,lunar declination angle,celestial tidal force,and other phenomena on M≥8 global earthquakes at the beginning of the 21st century.With regard to solar activity,this study focuses on the analysis of the 11-year and century cycles of solar activity.The causal relationship of the Earth’s rotation is not obvious in this work and previous works;in contrast,the valley period of the solar activity century cycle may be an important astronomical factor leading to the frequent occurrence of global earthquakes at the beginning of the 21st century.This topic warrants further study. 展开更多
关键词 M≥8.0 earthquake astronomical factors solar activity Earth’s rotation lunar declination angle tidal force phenomena
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The neotectonic deformation and earthquake activity in Zhuanglang river active fault zone of Lanzhou 被引量:1
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作者 袁道阳 刘百篪 +3 位作者 张培震 刘小凤 才树华 刘小龙 《Acta Seismologica Sinica(English Edition)》 CSCD 2002年第4期462-466,共5页
Lanzhou Institute of Seismology, China Seismological Bureau, Lanzhou 730000, China 2) Institute of Geology, China Seismological Bureau, Beijing 100029, China
关键词 Zhuanglang river active fault zone neotectonic deformation fault-propagation fold earthquake activity
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Paterns and regularity of ring distribution of seismic activity before great earthquakes in China 被引量:1
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作者 梅世蓉 宋治平 薛艳 《Acta Seismologica Sinica(English Edition)》 CSCD 1996年第4期4-12,共9页
A systematic study on ″ring phenomena″ frequently occurring before great earthquakes has made in this paper, which has analyzed the features of ring distributions before 16 great earthquakes and part of large ear... A systematic study on ″ring phenomena″ frequently occurring before great earthquakes has made in this paper, which has analyzed the features of ring distributions before 16 great earthquakes and part of large earthquakes in China and its boundary areas, and discussed their features of generality, regularity and predictive meaning. The results have showed that moderate earthquakes or larger earthquakes distribute around the epicenter like a ring from decades to hundred years before the great earthquakes of magnitude more than 7, which is a general phenomenon of great earthquakes without an exception. The active ring generally occurs in the areas from hundreds to thousands of kilometers from the epicenter(according to the magnitude). The seismicity in the ring has three basic stages with different features. in the first stage, seismicity remains at low level and the earthquakes distribute scatteredly, while the source area of the future great earthquake remains quiet; in the second stage, the seismicity strengthens, whose frequency, intensity, concentrated degree, released rate of strain and ratio of distributed area etc. increase, while the quiet area decreases or disappears; in the third stage, the seismicity is weaker than in the former stage, and the quiet area appears again. The source area surrounded by the active ring might have three periods of activity(called as early term, medium term and late term foreshocks activity). The length of the quiet area undergoes the process from large to small, then to large. Therefore, we can estimate the occurring place, magnitude and seismogenic stage of great earthquake according to the area,length and the seismicity in the active ring, which is valuable to make a long term prediction of great earthquakes. At last, we had a preliminary discussion on the mechanism of active ring formation. 展开更多
关键词 ring phenomenon strengthening area of earthquake activity earthquake clusters hard inclusion body strong body earthquake generating model.
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Strong Earthquake Activity and Its Relation to Regional Neotectonic Movement in Sichuan-Yunnan Region 被引量:4
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作者 Su Youjin and Qin Jiazheng Seismological Bureau of Yunnan Province,Kunming 650041,China 《Earthquake Research in China》 2001年第3期239-251,共13页
Based on analyzing space inhomogeneous image of strong earthquake activity, the image of source rupture and the mechanical property of the source fault in Sichuan-Yunnan region, the relations among the strong earthqua... Based on analyzing space inhomogeneous image of strong earthquake activity, the image of source rupture and the mechanical property of the source fault in Sichuan-Yunnan region, the relations among the strong earthquake activity, active fault, modern movement status of active blocks and structural background of the deep media have been discussed, and the characteristics of strong earthquake activity and possible mechanism have been also discussed. 展开更多
关键词 Sichuan-Yunnan region Strong earthquake activity Neotettonic movement
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Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China(December,1997~January,1998) 被引量:1
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作者 陈培善 《Acta Seismologica Sinica(English Edition)》 CSCD 1998年第3期120-121,共2页
StrongearthquakeactivityalovertheworldandstrongmoderateearthquakeactivitywithinandnearChina(December,1997~Ja... StrongearthquakeactivityalovertheworldandstrongmoderateearthquakeactivitywithinandnearChina(December,1997~January,1998)PEI?.. 展开更多
关键词 MODERATE December 1997 January 1998 China activity ALL and earthquake NEAR over
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SLC Analysis on Earthquake Activity in the Regions of Sichuan and Yunnan of China 被引量:1
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作者 Gao Yuan Zhou Huilan Ma Yanlu 《Earthquake Research in China》 2000年第3期84-90,共7页
Using the method of Single-link Cluster(SLC),analyzing the pattern of time sliding of SLCparameters,the earthquake activity in the western Sichuan-Yunnan of China is studiedcombining with the regional earthquake catal... Using the method of Single-link Cluster(SLC),analyzing the pattern of time sliding of SLCparameters,the earthquake activity in the western Sichuan-Yunnan of China is studiedcombining with the regional earthquake catalogue since 1970 and the tectonic background.Comparing with the high level of earthquake activity in 1970’s and the low in 1980’s,theearthquake activity is in general at the middle level in 1990’s.This paper suggests that SLCmethod,which considers the temporal and spatial relationship among earthquake events,could be adopted to analyze the trend of regional earthquake activity,it is very useful forstudying seismic activity. 展开更多
关键词 Single-link CLUSTER (SLC) earthquake activity Sichuan-Yunnan region LINK LENGTH earthquake CLUSTER
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The Characteristics of Seismic Activity Before the Devastating Earthquake with M_W9.0 Off the West Coast of Northern Sumatra 被引量:1
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作者 Xue Yan Song Zhiping +1 位作者 Mei Shirong Liu Jie 《Earthquake Research in China》 2006年第2期118-126,共9页
The characteristics of seismic activity in different time-spatial domain before the M_W9.0 earthquake were studied. The results are as follows:The activity of the deep earthquakes in the north boundary zone of the Aus... The characteristics of seismic activity in different time-spatial domain before the M_W9.0 earthquake were studied. The results are as follows:The activity of the deep earthquakes in the north boundary zone of the Australian plate had been evidently strengthened since 1994, showing an increased frequency, magnitude and depth, especially in regards to the heterogeneous distribution of the earthquake depth (namely between 500km and 689km). Meanwhile the shallow earthquakes of M≥7.0 in the Sumatra island and its vicinity had been obviously strengthened too, and formed a strengthening area with a length of about 1000 km and width 300 km. ②The time distribution of global strong earthquakes with M≥7.0 shows that the character of anomalous seismic quiescence-activity one year before the M_W9.0 earthquake and during its active period, the strong earthquakes formed a seismic belt striking in NWW direction. At the same time, there is a seismic gap formed by earthquakes of M≥5.0 in the epicenter and its neighboring region. ③Two deep earthquakes of M≥7.0 occurred in the west and in the east of the north boundary zone of the Australian plate half year ago. It is notable that one of them occurred in the Sumatra island where no deep earthquake with M≥6.0 has occurred in the past thirty years. ④The space distribution of moderate shocks occurring three days ago exhibited a NWW-strike seismic belt along the north boundary zone of the Australian plate. ⑤The activity of volcanoes distributed in the north boundary zone of the Australian plate had been strengthened in the past 4 years, especially several months before the occurrence of the M_W9.0 earthquake. 展开更多
关键词 The Australian plate Sumatra island Sunda trench Seismic gap Strengthened seismic activity Seismic belt Deep earthquake activity Volcano activity
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Research on the Characteristics of Large Earthquake Activity on the Active Tectonic Boundaries on the Chinese Mainland 被引量:1
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作者 Ma Hongsheng Zhang Guomin +1 位作者 Liu Jie Wang Hui 《Earthquake Research in China》 2006年第3期232-243,共12页
Based on the research and the division of the active tectonic blocks and their boundaries on the Chinese mainland, the feature of the large earthquake activities on the 24 boundaries between the 6 active tectonic bloc... Based on the research and the division of the active tectonic blocks and their boundaries on the Chinese mainland, the feature of the large earthquake activities on the 24 boundaries between the 6 active tectonic block regions (grade Ⅰ) and the 22 active tectonic blocks (grade Ⅱ) are studied. The seismicity levels on the active tectonic block boundaries are discussed considering the large earthquake frequency and the released strain energy in unit distance and time. The theoretic maximal magnitude and the recurrence period of each boundary are then calculated from the G-R relation. By comparing this with the actual earthquake records, it is found that the intensities of the earthquake deduced from the seismic activity parameter (a/b) on the main active boundaries on the Chinese mainland are consistent with that of the natural earthquakes. Meanwhile, an inverse relation is found between the recurrence periods of large earthquakes and the tectonic motion rate on the boundaries. These results show that the a, b values of each boundary obtained in this paper are valuable. In addition, the present seismic activities and hazards of these boundaries are also probed into with the historical data and their elapsed time on each boundary based on the hypothesis that the large earthquakes satisfy Poisson distribution. 展开更多
关键词 active tectonic block active tectonic boundary Large earthquake activity Seismic activity parameter a and b value
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The middle-long term prediction of the February 3,1996 Lijiang earthquake(M_S=7) by the "criterion of activity in quiescence
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作者 郭增建 秦保燕 《Acta Seismologica Sinica(English Edition)》 CSCD 2000年第4期477-480,共4页
Earthquake activities in history are characterized by active and quiet periods. In the quiet period, the place where earthquake M_≥6 occurred means more elastic energy store and speedy energy accumulation there. When... Earthquake activities in history are characterized by active and quiet periods. In the quiet period, the place where earthquake M_≥6 occurred means more elastic energy store and speedy energy accumulation there. When an active period of big earthquake activity appeared in wide region, in the place where earthquake (M_≥6) occurred in the past quiet period, the big earthquake with magnitude of 7 or more often occur there. We call the above-mentioned judgement for predicting big earthquake the 'criterion of activity in quiescence'. The criterion is relatively effective for predicting location of big earthquake. In general, error of predicting epicenter is no more than 100 km. According to the criterion, we made successfully a middle-term prediction on the 1996 Lijiang earthquake in Yunnan Province, the error of predicted location is about 50 km. Besides, the 1994 Taiwan strait earthquake (M_s=7.3), the 1995 Yunnan-Myanmar boundary earthquake (M_s=7.2) and the Mani earthquake (M_s=7.9) in north Tibet are accordant with the retrospective predictions by the 'criterion of activity in quiescence'. The windows of 'activity in quiescence' identified statistically by us are 1940-1945, 1958-1961 and 1979-1986. Using the 'criterion of activity in quiescence' to predict big earthquake in the mainland of China,the earthquake defined by 'activity in quiescence' has magnitude of 6 or more; For the Himalayas seismic belt, the Pacific seismic belt and the north-west boundary seismic belt of Xinjiang, the earthquake defined by 'activity in quiescence' has magnitude of 7, which is corresponding to earthquake with magnitude of much more than 7 in future. For the regions where there are not tectonically and historically a possibility of occurring big earthquake (M_s=7), the criterion of activity in quiescence is not effective. 展开更多
关键词 criterion of activity in quiescence middle-long term prediction Lijiang earthquake earthquake in Taiwan strait Mani earthquake
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Characteristics of seismic activity before several large Sumatra, Indonesia, earthquakes
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作者 薛艳 宋治平 +1 位作者 梅世蓉 马宏生 《Acta Seismologica Sinica(English Edition)》 CSCD 2008年第3期325-329,333,共6页
Two great earthquakes of MS8.5 and MS8.3 determined by the China Earthquake Networks Center (CENC) occurred successively on September 12 and 13, 2007 in the sea area to the south of Sumatra, which is another group of ... Two great earthquakes of MS8.5 and MS8.3 determined by the China Earthquake Networks Center (CENC) occurred successively on September 12 and 13, 2007 in the sea area to the south of Sumatra, which is another group of large earthquakes after MS8.7 event on December 26, 2004 and MS8.5 event on March 29, 2005. The 展开更多
关键词 seismic gap strengthened seismic activity deep earthquake activity Wadati-Benioff belt
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An overview on shallow strong earthquake activity and earthquake live losses of Chinese mainland in the centenary from 1901 to 2001
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作者 傅征祥 刘桂萍 +1 位作者 邵辉成 丁香 《Acta Seismologica Sinica(English Edition)》 CSCD 2005年第4期392-401,共10页
This paper reviews and analyses briefly the general characteristics of shallow strong earthquakes (MS≥6.0, focal depth h≤70 km) in space, time and magnitude and earthquake fatalities of Chinese mainland in the cente... This paper reviews and analyses briefly the general characteristics of shallow strong earthquakes (MS≥6.0, focal depth h≤70 km) in space, time and magnitude and earthquake fatalities of Chinese mainland in the centenary from 1901 to 2001. During the period from 1901 to 2001, there occurred about 420 strong shallow earthquakes with magnitude MS≥6.0, 88% of them occurred in the western part of the Chinese mainland, which might be related to the strong deformation and motion of the active blocks in the western part. The average focal depth (25 km) in the western part is deeper than that (16 km) in the eastern part, which might be related to obviously thicker crust in the western part. The inhomogeneous distribution of focal depths with the depth profile is related to the variation of frictional and rheologic characteristics with depth in the crust. The shallow strong earthquake activity of Chinese mainland shows a tempo-spatial clustering process. The relation between earthquake magnitude MS and cumulative frequency Nc is lgNc=8.64–0.99MS. About 600 000 people died in the earthquakes of Chinese mainland from 1901 to 2001, the most serious earthquake live losses occurred in Hebei Province (250 723 people died) and Ningxia Hui Autonomous Region (246 269 died). There is no a statistically linear relationship between earthquake live losses and magnitudes. The statistical relationship between the earthquake deaths D and cumulative frequency Nc is lgNc=2.40–0.39lgD, which shows a fractal distribution. 展开更多
关键词 Chinese mainland shallow earthquake activity live losses 1901~2001
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Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China (August,1998~September,1998)
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作者 陈培善 《Acta Seismologica Sinica(English Edition)》 CSCD 1999年第1期125-127,共3页
lustrationAlthedatainthiscataloguearechosenfromthe″PreliminarySeismologicalReportofChineseSeismicStations″(I... lustrationAlthedatainthiscataloguearechosenfromthe″PreliminarySeismologicalReportofChineseSeismicStations″(Itsabbreviationis″... 展开更多
关键词 MODERATE China September 1998 AUGUST 1998 activity all and earthquake NEAR over
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Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China (April, 2002 ~ May, 2002)
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作者 CHEN Pei-shan(陈培善) 《Acta Seismologica Sinica(English Edition)》 CSCD 2002年第5期583-584,共2页
关键词 OVER time UTC MS MAY Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China APRIL
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Strong earthquake activity all over the world and strong-moderate earthquake activitywithinandnearChina(December,1995~February,1996)
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作者 陈培善 《Acta Seismologica Sinica(English Edition)》 CSCD 1996年第3期165-168,共4页
Strongearthquakeactivityalovertheworldandstrong┐moderateearthquakeactivitywithinandnearChina(December,1995~F... Strongearthquakeactivityalovertheworldandstrong┐moderateearthquakeactivitywithinandnearChina(December,1995~February,1996)PEI-... 展开更多
关键词 MODERATE December activity ALL and earthquake FEBRUARY over STRONG the
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Strong earthquake activity all over the world and strong—moderate earthquake activity within and near China(August,2002~September,2002)
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作者 陈培善 《Acta Seismologica Sinica(English Edition)》 CSCD 2003年第1期124-125,共2页
关键词 OVER time UTC MS of AUGUST September Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China
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Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China (April, 2005~May, 2005)
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作者 陈培善 《Acta Seismologica Sinica(English Edition)》 CSCD 2005年第5期130-131,共2页
关键词 OVER MS Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China APRIL MAY
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Strong earthquake activity all over the world and strong moderate earthquake ac—tivity within and near China(Oct,2002~Nov,2002)
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作者 陈培善 《Acta Seismologica Sinica(English Edition)》 CSCD 2003年第2期233-235,共3页
关键词 OVER time UTC of MS Strong earthquake activity all over the world and strong moderate earthquake activity within and near China NOV OCT West
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Preliminary study on the duration of earthquake activity
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作者 黄福明 《Earthquake Science》 CSCD 1994年第S1期121-127,共7页
PreliminarystudyonthedurationofearthquakeactivityFu-MingHUANG(黄福明)(InstituteofCrustalDynamics,StateSeismolog... PreliminarystudyonthedurationofearthquakeactivityFu-MingHUANG(黄福明)(InstituteofCrustalDynamics,StateSeismologicalBureau,Beijin... 展开更多
关键词 earthquake activity duration of seismic activity
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Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China (February, 2005~March, 2005)
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作者 陈培善 《Acta Seismologica Sinica(English Edition)》 CSCD 2005年第4期496-498,共3页
关键词 OVER MS FEBRUARY MARCH Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China
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