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1.
亚洲大陆晚新生代和现代构造变形以活动地块为主要特征,表现为在统一构造格局下不同地块间具有不同的运动方式和速度。为了研究这些具有不同运动学性质块体间的相互作用以及构造变形特征,基于亚洲大陆的总体构造格局构建了二维有限元模型。根据模拟结果,对比已知GPS数据、震源机制解以及地质调查数据等,定量分析了大陆内部主要活动地块构造应力场的分布特征,并探讨了影响亚洲大陆现今构造变形特征的主要因素。结果表明：在我国的西部陆块内,由于周边一系列近EW向弧形活动构造带的存在,导致其内部次级块体运动速率的衰减,从而进一步导致应力环境的变化,由青藏中部的挤压-拉张环境逐渐转变为塔里木、天山地区的完全挤压环境;在西伯利亚地块和印度板块的联合挤压作用下,华北地块上地壳的应力表现为较弱的挤压环境,而在该种应力环境下块体内部伸展构造的成因很可能与其深部的动力学环境有关;华南地块的运动方向与台湾造山带相反,从而形成一个秦岭-大别造山带以南的较强烈的挤压-拉张区;在印度-澳大利亚板块和菲律宾俯冲板块的联合挤压作用下,巽他地块作为华南地块和印支地块的逃逸窗口,表现出以婆罗洲、南海为中心近圆弧形的弱挤压区以及环绕挤压区外缘挤压-拉张区的应力分布特征。 相似文献
2.
A. Manglik S. Thiagarajan A. V. Mikhailova Yu. Rebetsky 《Journal of Earth System Science》2008,117(2):103-111
Deep lower crustal intraplate earthquakes are infrequent and the mechanism of their occurrence is not well understood. The
Narmada-Son-lineament region in central India has experienced two such events, the 1938 Satpura earthquake and the 1997 Jabalpur
earthquake, having a focal depth of more than 35 km. We have estimated elastic stresses due to the crustal density and mechanical
properties heterogeneities along the Hirapur-Mandla profile passing through the Jabalpur earthquake region to analyse conditions
suitable for the concentration of shear stresses in the hypocentral region of this earthquake. Elastic stresses have been
computed by a finite element method for a range of material parameters. The results indicate that the shear stresses generated
by the density heterogeneities alone are not able to locally enhance the stress concentration in the hypocentral region. The
role of mechanical properties of various crustal layers is important in achieving this localization of stresses. Among a range
of material parameters analysed, the model with a mechanically strong lower crust overlying a relatively weak sub-Moho layer
is able to enhance the stress concentration in the hypocentral region, implying a weaker mantle in comparison to the lower
crust for this region of central India. 相似文献
3.
本文系统解析并分析了1931年8月-2005年10月期间青藏高原及其周围发生的905个震级M4．5-8．5地震的震源机制结果,研究了青藏高原岩石圈的区域应力场与构造运动特征。结果表明,来自印度板块的北北东或北东方向的水平挤压应力控制了青藏高原及其周缘地区的岩石圈应力场。从喜马拉雅到贝加尔湖以南包括中国西部的广大范围内,主压应力P轴的水平分量位于近NE-SW方向,形成了一个广域的NE-SW方向的挤压应力场。特别是青藏高原周缘地区,除其东部边缘外,南部的喜马拉雅山前沿以及青藏高原的北部、西部边缘地区所发生的绝大部分地震都属于逆断层型或走滑逆断层型地震,表现出周缘地区的水平挤压应力更为强势。应力场特征充分表明, 印度板块的北上运动,以及它与欧亚板块之间的碰撞,所形成的挤压应力场是青藏高原强烈隆起的直接原因。在青藏高原周缘地区受到强烈挤压应力场控制的同时,有大量正断层型地震集中发生在青藏高原中部海拔4000m以上的地区,其中许多地震是纯正断层型地震。震源机制结果显示,近E-W向或WNW-ESE向的水平扩张应力控制着该区的岩石圈应力场;正断层型地震的断层走向多为南北方向,断层位错矢量的水平分量大体位于近东西方向。这表明青藏高原中部高海拔地区存在着近东西方向的扩张构造运动,且扩张构造运动是该区引张应力场的作用结果。其动力学原因可能与持续隆升的高原自重增大引起的重力崩塌及其周边区域构造应力状况有关。研究青藏高原存在挤压应力场与引张应力场及其构造运动的区域特征,对于认识青藏高原形成、发展的地球动力学机制,有着极其重要的意义。 相似文献
4.
Precise data obtained by a high-sensitivity micro-earthquake observatory network are used to determine simultaneously the crustal structure and the spatial distribution of small earthquakes in the Kii peninsula region, Japan. The spatial distribution of hypocenters thus determined clearly shows two distinct groups of earthquakes: (1) a group of shallow (H ? 10 km) earthquakes on the western coast of the Kii peninsula near Wakayama; (2) a group of mantle earthquakes, having a depth ranging from 30 to 70 km and trending NE-SW, in the central part of the Kii peninsula. Along the trend of the second group, a marked structural anomaly is found which suggests the presence of a high-velocity zone at depths below 20 km. A projection of the hypocenters of the earthquakes belonging to the second group onto a vertical plane strikingNW-SE shows a wedge-like distribution to a depth of 70 km. The spatial relation between this wedge-like distribution and the 1944 Tonankai earthquake (M = 8.0) suggests a common tectonic process which is now taking place in the Kii peninsula region. The activity of the earthquakes of the first group terminates abruptly to the north at the Median Tectonic Line. This activity is represented by numerous but relatively small events (M < 5) without any conspicuous major earthquakes in history. It is suggested that the strength of the crust in this region of shallow activity is too weak to sustain stresses large enough to be released in a major event; rather, the stresses which probably originate from the tectonic activity represented by the earthquakes of the second group are released by numerous minor fracturings of the low-strength crust. A possibility of using the weak crust for detecting a remote stress accumulation is suggested. 相似文献
5.
Long wavelength gravity anomalies over India were obtained from terrestrial gravity data through two independent methods: (i) wavelength filtering and (ii) removing crustal effects. The gravity fields due to the lithospheric mantle obtained from two methods were quite comparable. The long wavelength gravity anomalies were interpreted in terms of variations in the depth of the lithosphere–asthenosphere boundary (LAB) and the Moho with appropriate densities, that are constrained from seismic results at certain points. Modeling of the long wavelength gravity anomaly along a N–S profile (77°E) suggest that the thickness of the lithosphere for a density contrast of 0.05 g/cm3 with the asthenosphere is maximum of ∼190 km along the Himalayan front that reduces to ∼155 km under the southern part of the Ganga and the Vindhyan basins increasing to ∼175 km south of the Satpura Mobile belt, reducing to ∼155–140 km under the Eastern Dharwar craton (EDC) and from there consistently decreasing south wards to ∼120 km under the southernmost part of India, known as Southern Granulite Terrain (SGT).The crustal model clearly shows three distinct terrains of different bulk densities, and thicknesses, north of the SMB under the Ganga and the Vindhyan basins, and south of it the Eastern Dharwar Craton (EDC) and the Southern Granulite Terrain (SGT) of bulk densities 2.87, 2.90 and 2.96 g/cm3, respectively. It is confirmed from the exposed rock types as the SGT is composed of high bulk density lower crustal rocks and mafic/ultramafic intrusives while the EDC represent typical granite/gneisses rocks and the basement under the Vindhyan and Ganga basins towards the north are composed of Bundelkhand granite massif of the lower density. The crustal thickness along this profile varies from ∼37–38 km under the EDC, increasing to ∼40–45 km under the SGT and ∼40–42 km under the northern part of the Ganga basin with a bulge up to ∼36 km under its southern part. Reduced lithospheric and crustal thicknesses under the Vindhyan and the Ganga basins are attributed to the lithospheric flexure of the Indian plate due to Himalaya. Crustal bulge due to lithospheric flexure is well reflected in isostatic Moho based on flexural model of average effective elastic thickness of ∼40 km. Lithospheric flexure causes high heat flow that is aided by large crustal scale fault system of mobile belts and their extensions northwards in this section, which may be responsible for lower crustal bulk density in the northern part. A low density and high thermal regime in north India north of the SMB compared to south India, however does not conform to the high S-wave velocity in the northern part and thus it is attributed to changes in composition between the northern and the southern parts indicating a reworked lithosphere. Some of the long wavelength gravity anomalies along the east and the west coasts of India are attributed to the intrusives that caused the breakup of India from Antarctica, and Africa, Madagascar and Seychelles along the east and the west coasts of India, respectively. 相似文献
6.
笔者系统分析了1918—2005年间中国大陆及其周缘发生的3130个中、强地震的震源机制解,根据其特征进行了岩石圈应力场构造分区,首次得到区域应力场的压应力轴和张应力轴空间分布的统计数字结果。在此基础上研究了应力场的区域特征、探讨了其动力学来源以及构造运动特征。总体结果表明,中国大陆及其周缘岩石圈应力场和构造运动可以归结为印度洋板块、太平洋板块、菲律宾海板块与欧亚板块之间相对运动,以及大陆板内区域块体之间的相互作用的结果。印度洋板块向欧亚板块的碰撞挤压运动所产生的强烈的挤压应力,控制了喜马拉雅、青藏高原、中国西部乃至延伸到天山及其以北的广大地区。在青藏高原周缘地区和中国西部的大范围内,压应力P轴水平分量方位位于20～40°,形成了近NE方向的挤压应力场。大量逆断层型强震集中发生在青藏高原的南、北和西部周缘地区,以及天山等地区。而多数正断层型地震集中发生在青藏高原中部高海拔的地区,断层位错的水平分量位于近东西方向。表明青藏高原周缘区域发生南北向强烈挤压短缩的同时,中部高海拔地区存在着明显的近东西向的扩张运动。中国东部的华北地区受到太平洋板块向欧亚板块俯冲挤压的同时,又受到从贝加尔湖经过大华北直到琉球海沟的广阔地域里存在着的统一的、方位为170°的引张应力场的控制。华北地区大地震的震源机制解均反映出该区地震的发生大体为NEE向挤压应力和NNW向张应力的共同作用结果。台湾纵谷断层是菲律宾海板块与欧亚板块之间碰撞挤压边界。来自北西向运动的菲律宾海板块构造应力控制了从台湾纵谷、华南块体,直到中国南北地震带南段东部地域的应力场。地震的震源机制结果还表明,将中国大陆分成东、西两部分的中国南北地震带是印度洋板块、菲律宾海板块与太平洋板块在中国大陆内部影响控制范围的分界线。 相似文献
7.
《Gondwana Research》2013,23(3-4):1068-1072
We analyze GPS data from 26 sites located on the Indian plate and along its boundary. The large spatial coverage of the Indian plate by these sites and longer data duration helped us in refining the earlier estimates of the Euler pole for the Indian plate rotation. Our analysis suggests that the internal deformation of the Indian plate is very low (< 1–2 mm/year) and the entire plate interior region largely behaves as a rigid plate. Specifically, we did not infer any significant difference in motion on sites located north and south of the Narmada Son failed rift region, the most prominent tectonic feature within the Indian plate and a major source of earthquakes. Our analysis also constrains the motion across the Indo-Burmese wedge, Himalayan arc, and Shillong Plateau and Kopili fault in the NE India. 相似文献
8.
《Gondwana Research》2010,17(3-4):512-526
The spatial distribution of deep slow earthquake activity along the strike of the subducting Philippine Sea Plate in southwest Japan is investigated. These events usually occur simultaneously between the megathrust seismogenic zone and the deeper free-slip zone on the plate interface at depths of about 30 km. Deep low-frequency tremors are weak prolonged vibrations with dominant frequencies of 1.5–5 Hz, whereas low-frequency earthquakes correspond to isolated pulses included within the tremors. Deep very-low-frequency earthquakes have long-period (20 s) seismic signals, and short-term slow-slip events are crustal deformations lasting for several days. Slow earthquake activity is not spatially homogeneous but is separated into segments some of which are bounded by gaps in activity. The spatial distribution of each phase of slow earthquake activity is usually coincident, although there are some inconsistencies. Very-low-frequency earthquakes occur mainly at edges of segments. Low-frequency earthquakes corresponding to tremors of relatively large amplitude are concentrated at spots where tremors are densely distributed within segments. The separation of segments by gaps suggests large differences in stick-slip and stable sliding caused by frictional properties of the plate interface. Within each segment, variations in the spatial distribution of slow earthquakes reflected inhomogeneities corresponding to the characteristic scales of events. 相似文献
9.
A double-planed structure of deep seismic zone has been found over a wide area more then 300 km × 200 km in the Tohoku District, the northeastern part of Honshu, Japan. This prominent feature of the configuration of the deep seismic zone has been ascertained through a precise determination of the microearthquake hypocenters by using the data from the seismic network of Tohoku University. The two planes are nearly parallel to each other, the distance between the two planes being from 30 to 40 km.Composite focal mechanism solutions are derived from the superposition of the distribution of first motions of P waves, and the different fault types are obtained for the two groups of earthquakes; the earthquakes which occurred in the upper plane are characterized by reverse faulting, some of them by down-dip compressional stresses, and those in the lower plane by down-dip extensional stresses. The evidence obtained here provides valuable information for the definition of the type of mechanism producing the plate motion beneath the island arc. 相似文献
10.
The spatial distribution of deep slow earthquake activity along the strike of the subducting Philippine Sea Plate in southwest Japan is investigated. These events usually occur simultaneously between the megathrust seismogenic zone and the deeper free-slip zone on the plate interface at depths of about 30 km. Deep low-frequency tremors are weak prolonged vibrations with dominant frequencies of 1.5–5 Hz, whereas low-frequency earthquakes correspond to isolated pulses included within the tremors. Deep very-low-frequency earthquakes have long-period (20 s) seismic signals, and short-term slow-slip events are crustal deformations lasting for several days. Slow earthquake activity is not spatially homogeneous but is separated into segments some of which are bounded by gaps in activity. The spatial distribution of each phase of slow earthquake activity is usually coincident, although there are some inconsistencies. Very-low-frequency earthquakes occur mainly at edges of segments. Low-frequency earthquakes corresponding to tremors of relatively large amplitude are concentrated at spots where tremors are densely distributed within segments. The separation of segments by gaps suggests large differences in stick-slip and stable sliding caused by frictional properties of the plate interface. Within each segment, variations in the spatial distribution of slow earthquakes reflected inhomogeneities corresponding to the characteristic scales of events. 相似文献
11.
J. R. Kayal V. K. Srivastava S. N. Bhattacharya P. K. Khan Rima Chatterjee 《Journal of the Geological Society of India》2009,74(3):413-419
A three-component broadband seismograph is in operation since January 2007 at the Indian School of Mines (ISM) campus. We
have used the broadband seismograms of two local earthquakes M <3 recorded by this single station to illustrate its efficacy
in understanding the source processes and tectonics in Dhanbad area. Source parameters and fault plane solutions are obtained
through waveform inversion. It is observed that these two earthquakes occurred in the lower crust at a depth of 26 km by strike
slip faulting. North-south compressional and east-west tensional stresses are dominant in the area, and the lower crust is
the source area for the local earthquakes. 相似文献
12.
Relocation of well observed, intermediate depth earthquakes in the Fiordland region by the method of joint hypocentre determination has revealed some fine structure in the Benioff zone. The earthquakes occur in three groups. The central group is the largest and occupies a planar volume less than 15 km thick striking N40°E and dipping at 80°. The deepest events in the region, at depths of 150 km, occur at the northeast end of this group. The two smaller groups lie to the northeast and to the south of the main group. The focal mechanism of the majority of the main group is that of thrust faulting. We suggest that the main group lies within a section of Indian plate lithosphere which has been broken off and rotated into its observed position and that the northern edge of the unbroken subducted Indian plate is indicated by the southern group. We suggest that the small northeastern group has quite a different tectonic origin and is similar to a group of earthquakes further north which are at a similar distance from, and presumably related to, the Alpine Fault.Use has also been made of the travel-time information which is a by-product of the joint hypocentre method to construct upper mantle velocity models for P and S waves in the South Island. The features of this model are a high-velocity region in the vicinity of the Benioff zone, and a subcrustal zone of high seismic velocities running east-west across the center of the South Island in an otherwise normal mantle. 相似文献
13.
青藏高原现今构造变形特征与GPS速度场 总被引：105，自引：12，他引：105
文章以青藏高原的GPS观测数据为基础 ,结合活动地质构造资料 ,研究了青藏高原的现今构造变形状态和机制 ,并探讨青藏高原现今构造变形所反映的大陆内部动力学过程。GPS观测的速度矢量揭示了青藏高原整体向北和向东运动的趋势 ,平行于印度和欧亚板块碰撞方向上的地壳缩短量约是 38mm/a ,而青藏高原周边主要断裂带的滑动速率均在 10mm/a以下。大约 90 %的印度与欧亚板块相对运动量被青藏高原的地壳缩短所吸收和调节。GPS速度矢量由南向北逐渐向东偏转 ,向东的分量也增加 ,形成了以羌塘地块北部 (或玛尼—玉树—鲜水河断裂 )和祁连山中部为中心的两个地壳物质向东流动带。青藏高原的向东挤出实际上是地壳物质在印度板块推挤下和周边刚性地块阻挡下围绕东构造结发生的顺时针旋转。 相似文献
14.
阿尔金断裂带东段地区的地质构造特征及其动力学机制一直是地学工作者关注的焦点。近年来小震资料越来越多应用到活动断裂空间展布、深浅构造分析及动力学机制研究领域。本文应用双差定位法获得研究区域2008～2017年间6013次地震事件的精确定位数据,通过多条小震深度剖面清晰刻画出断裂系统的空间展布形态。综合石油地震剖面、人工地震宽角反射/折射剖面、人工地震深反射剖面,充分利用小震精确定位信息以及浅表活动构造研究成果,建立研究区断裂系统的深浅部构造模型。研究区莫霍面由北往南逐渐加深,存在三处断错,呈阶梯状展布,地壳内存在一条厚约10km的低速层,在该层以上为地震多发区,断裂系统总体呈"Y"字型,上部为一系列叠瓦状逆冲断裂,造成祁连山的隆升,向下并入一条主干断层。最后探讨了青藏高原东北缘地区构造运动的动力学机制,亚洲板块俯冲至祁连山前,上地壳以逆冲推覆构造模式造成上地壳增厚现象,而中下地壳主要为亚洲岩石圈地幔下插,上地幔的拖曳作用下发生流动引起地壳增厚,上下地壳整体增厚。 相似文献
15.
Focal-mechanism solutions of four earthquakes in the eastern Himalayas and northern Burma are determined using the first motion of compressional waves. Two possible solutions thus obtained for each event reveal steeply dipping fault with predominantly strike-slip motion. The stress directions inferred from the focal mechanism solutions are interpreted in the light of predictions of the plate tectonics theory, viz., the underthrusting of the Indian plate in the Burma region in an easterly direction.Dynamic parameters (seismic moment, apparent stress and average dislocations) are obtained using the corrected spectra of Love waves. The earthquakes are found to possess low seismic moment and apparent stress values. A comparison of these estimates with values for intraplate earthquakes is given. It is suggested that these earthquake might be a consequence of a nonhomogeneous rupture process. 相似文献
16.
Seabeam, seismic and submersible surveys took place during the Kaiko Project and revealed significant compressive deformation at the northeastern end of the Philippine Sea plate, related to the recent collision of the Izu-Ogasawara Arc against Central Japan. Intraoceanic thrusting at the base of the Zenisu Ridge, a linear topographic high running a few tens of kilometers south of the Nankai Trough, is supported by tectonic, magnetic and gravimetric data. We investigate the formation of the Zenisu Ridge in terms of compressive mechanical failure of a thin elastic-perfectly plastic plate, subducting at a trench and subject to a regional compressive axial force. The rheological envelope concept is used throughout the numerical calculations. Based on a detailed study of flexure of the present-day bending far from the deformation zone, we evaluate the bending forces involved: the bulge is 120 to 150 m high and the compressive stress all along the Nankai Trough is about −100 MPa. In the Zenisu Ridge area, an additional compressive stress is superimposed due to the nearby collision at Izu-Peninsula. We compute the vertical distribution of the deviatoric stress before failure and find that the deviatoric stress is maximum at a depth of 20–25 km in the trench area, and again at the surface 60 to 100 km seaward, in the vicinity of the bulge. The development of a thrust joining these two maxima through the entire thickness of the lithosphere is discussed. The model predicts that the formation of the Zenisu Ridge did not occur before 4 Ma and is caused by progressive tectonic uplift due to the redistribution of bending stresses as the ridge approaches the Nankai Trough. 相似文献
17.
Buckle-controlled seismogenic faulting in peninsular India 总被引：1，自引：0，他引：1
As intraplate earthquakes are often not associated with major known faults their location as well as their timing is unpredictable. In peninsular India the larger (M5.0) events occur mainly on reverse faults in a series of belts 400–800 km apart which are aligned roughly normal to the azimuth of convergence between the Indian and Eurasian plates. The location of the belts is controlled largely by the buckling wavelength of the lithosphere, and the seismogenic faults do not generate folding and sometimes result from it. There is consequently no need to postulate the creation of regularly spaced normal faults in an antecedent extensional phase, and the deformation is consistent with a plate-driving force such as gravity glide which is unlikely to reverse its polarity and which creates structures that are influenced by plate geometry at the leading edge. The thesis is potentially of value to seismic hazard mitigation as it identifies the zones that are most at risk. 相似文献
18.
Prosanta Kumar Khan Md Afroz Ansari S Mohanty 《Journal of Earth System Science》2014,123(5):1013-1030
The occurrences of moderate to large magnitude earthquakes and associated subsurface geological processes were critically examined in the backdrop of Indian plate obliquity, stress obliquity, topography, and the late Tertiary regional tectonics for understanding the evolving dynamics and kinematics in the central part of the Himalayas. The higher topographic areas are likely associated with the zones of depressions, and the lower topographic areas are found around the ridges located in the frontal part of the orogen. A positive correlation between plate and stress obliquities is established for this diffuse plate boundary. We propose that the zone of sharp bending of the descending Indian lithosphere is the nodal area of major stress accumulation which is released occasionally in form of earthquakes. The lateral geometry of the Himalayas shows clusters of seismicity at an angle of ～20° from the centre part of the arc. Such spatial distribution is interpreted in terms of compression across the arc and extension parallel to the arc. This biaxial deformation results in the development of dilational shear fractures, observed along the orogenic belt, at an angle of ～20° from the principal compressive stress axis. 相似文献
19.
印度大陆板块是一个活化的克拉通板块,其向北漂移并与欧亚板块碰撞过程得到了广泛研究,但其北漂的动力机制则很少被关注。传统上认为是海底扩张造成了印度大陆板块的北漂,但最新的地球物理观测结果却与此相悖。基于地磁场异常特征、古地磁测量和地震勘探剖面等诸多证据的系统分析研究,结果表明印度大陆板块厚度大约40 km,其北漂的动力机制与印度板块南侧深部的岩浆上涌密切相关,大陆板块的漂移是自发驱动的。通过新建立的大陆漂移模型可以合理解释印度大陆板块漂移的动力来源,并合理地解释了印度大陆板块北漂中伴随左旋的深层次动力机制。最后探讨了印度大陆板块在80~40 Ma期间异常高速漂移的根源和东非大裂谷的成因。本研究为大陆漂移模式提供了一个新的动力机制。 相似文献
20.
Prantik Mandal 《Journal of the Geological Society of India》2009,74(4):487-497
Spatial-temporal patterns of aftershocks of the 2001 Mw7.7 Bhuj earthquake during 2001–2008 reveal a northward spatial migration
of seismic activity in the Kachchh seismic zone, which could be related with the loading stresses caused by the continued
occurrences of aftershocks on the north Wagad fault (NWF), the causative fault of the 2001-mainshock. Aiming at explaining
the observed northward migration of activity, we modelled the Coulomb failure stress change (DCFS) produced by the 2001-mainshock,
the 2006 Mw5.6 Gedi fault (GF) and the 2007 Mw4.5 Allah bund fault (ABF) events on optimally oriented plane. A strong correlation
between occurrences of earthquakes and regions of increased DCFS is obtained on the associated three faults i.e. NWF, ABF
and GF. Predicted DCFS on the GF increased by 0.9 MPa at 3 km depth, where the 7th March 2006 Mw5.6 event occurred, whereas predicted DCFS on the ABF increased by 0.07 MPa at 30 km depth, where the 15th December 2007 Mw4.5 event occurred. Focal mechanism solutions of three events on the ABF have been estimated using the iterative
inversion of broadband data from 5–10 stations, which are also constrained by the first P-motion data from 8–12 stations.
These focal mechanism solutions for the ABF events reveal a dominant reverse movement with a strike-slip component along a
preferred northwest or northeast dipping plane (∼50–70°). Focal mechanisms of the events on all the three fault zones reveal
an N-S oriented P- axis or maximum principal stress in the region, which agrees with the prevailing N-S compression over the
Indian plate. It is apparent that the northward migration of the static stress changes from the NWF, resulting from the occurrence
2001 Bhuj mainshock, might have caused the occurrence of the events on the GF and ABF during 2006–08. 相似文献