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Tonghai Basin

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Journal Article
Published: 18 February 2020
Bulletin of the Seismological Society of America (2020) 110 (2): 898–919.
... with different fault surface traces and fault dips were discussed. We also provided explanations for the unbroken northwestern segment of the QF and the seismic intensity anomaly in the Tonghai basin during the 1970 Tonghai event. Finally, we presented several future potential earthquake scenarios occurring...
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(a) Maps of the PGVh distributions simulated from the dynamic sources of the stress rotation case in Figure 11a and the velocity model with two low‐velocity zones in the Tonghai basin and Quxi basin. The PGVh value is represented by the color. The intensity scales are plotted as black contours with blue Roman numerals in blue boxes. The red line represents the QF surface trace, whereas the white star with red edges signifies the epicenter. The red dashed rectangle emphasizes the Tonghai area and is amplified in (c). (b) The documented intensity in the Tonghai area. (d) The intensity distribution in the Tonghai area from Figure 12a. Blue lines in (b,c) illustrate the margin of the Tonghai basin.
Published: 18 February 2020
Figure 13. (a) Maps of the PGVh distributions simulated from the dynamic sources of the stress rotation case in Figure  11a and the velocity model with two low‐velocity zones in the Tonghai basin and Quxi basin. The PGVh value is represented by the color. The intensity scales are plotted
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Documented intensity distribution of the 1970 Tonghai earthquake from Liu et al. (1999), with the intensities indicated in bold black contour lines and red Roman numerals with red rectangles. The red solid line illustrates the surface rupture of the QF during the 1970 Tonghai earthquake, whereas the red dashed line represents the unbroken northwestern QF segment (Zhang and Liu, 1978). Two dashed black lines, AA′ and BB′, represent two profiles illustrating the velocity structure. The velocity profiles are shown in Figure 4. The two blue shaded areas denote the shapes of the Tonghai basin and the Quxi basin modified from He et al. (2013) and Wang et al. (2014), respectively. The red dashed rectangle emphasizes the Tonghai area and will be used in The low‐velocity basin effect section.
Published: 18 February 2020
of the Tonghai basin and the Quxi basin modified from He et al. (2013) and Wang et al. (2014) , respectively. The red dashed rectangle emphasizes the Tonghai area and will be used in The low‐velocity basin effect section.
Image
Maps of the synthetic intensity distributions calculated from the PGVh component. The PGVh values in (a–c) are simulated with the corresponding dynamic sources in Figure 11a–c. The red dashed rectangle emphasizes the location of the Tonghai basin. The black dashed rectangle illustrates the area in (d). (d) Comparison of the horizontal displacements predicted by the stress rotation model in (a) with the absolute surface deformation data resolved from leveling surveys. The long black line represents the QF surface trace, whereas the star denotes the epicenter. P1 and P2 are the two locations with the worst similarity with regard to the deformation direction and absolute value.
Published: 18 February 2020
Figure 12. Maps of the synthetic intensity distributions calculated from the PGVh component. The PGVh values in (a–c) are simulated with the corresponding dynamic sources in Figure  11a–c . The red dashed rectangle emphasizes the location of the Tonghai basin. The black dashed rectangle
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Seismic stations, earthquakes, and major tectonic units in the Sichuan–Yunnan region. Black triangles represent the seismic stations. Red circles mark the locations of earthquakes in our study, and their sizes represent magnitudes. Black thick lines denote the main faults, and black thin lines are the provincial boundaries. White dashed lines represent the tectonic boundaries. MCB, Myanmar Central basin; SC block, South China block; SCB, Sichuan basin; SYR, Sichuan–Yunnan rhombic; YZC, Yangtze craton. Main active blocks: I, Tengchong block; II, Baoshan block; III, Simao block; IV, Dianzhong block. Main faults: F1, Nujiang fault; F2, Lancangjiang fault; F3, Red River fault; F4, Jinshajiang fault; F5, Ailaoshan fault; F6, Xiaojin River fault; F7, Xiaojiang fault; F8, Mile fault; F9, Zemu River fault; F10, Lüzhijiang fault; F11, Chuxiong–Tonghai fault; F12, Xianshui River fault; F13, Longmen Shan fault; F14, Sagaing fault; F15, Longling–Lancang fault; F16, Nanting River fault; F17, Muga fault. The color version of this figure is available only in the electronic edition.
Published: 02 January 2020
thin lines are the provincial boundaries. White dashed lines represent the tectonic boundaries. MCB, Myanmar Central basin; SC block, South China block; SCB, Sichuan basin; SYR, Sichuan–Yunnan rhombic; YZC, Yangtze craton. Main active blocks: I, Tengchong block; II, Baoshan block; III, Simao block; IV
Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 10 February 2021
Lithosphere (2021) 2021 (1): 7866379.
... Dongchuan County to Fuxian Lake. The southern segment is located on the southern side of Fuxian Lake and is composed of multiple fault branches to the north of the Jianshui Basin. There is only one fault branch near and to the south of the Jianshui Basin, which is called the Jianshui fault (JSF; Figure 1...
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Journal Article
Published: 01 February 2025
Earthquake Spectra (2025) 41 (1): 412–435.
... al. (2022) delved into PDP across various fault dip angles, asperity sizes, and corresponding positions. Similarly, Ji et al. (2022) provided PDP insights for the 1970 Tonghai M S 7.8 earthquake across diverse scenario earthquakes. The PDP illustrates the spatial distribution of velocity pulses...
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Journal Article
Published: 30 September 2022
Seismological Research Letters (2023) 94 (1): 217–233.
.../09/08 101.529 23.28 SS 5.9 Sun and Liu (2019) 18 Yunnan‐Tengchong 2011/08/09 98.699 25.0 SS 5.2 Gao and Xu (2015) 19 Yunnan‐Tonghai 2018/08/13 102.709 24.19 SS 5.0 Wang et al. (2018) 20 Yunnan‐Tonghai 2018/08/14 102.709 24.19 SS 5.0 Wang et al. (2018...
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Journal Article
Published: 16 June 2022
Seismological Research Letters (2022) 93 (5): 2484–2497.
..., and extends to Dongchuan (Fig.  1a,b ). The middle segment is divided into east and west approximately parallel branches from Dongchuan to Tonghai, Huaning (Fig.  1a ). The southern segment lies from Tonghai, Huaning to the Honghe fault (Fig.  1a ). In the northern section, no earthquakes with magnitude...
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Journal Article
Published: 01 December 1976
Bulletin of the Seismological Society of America (1976) 66 (6): 1983–2001.
... such as a scarp is present along at least part of the lineament. Lineaments based entirely on straight stretches of river A C FIG. 3. (A) Lower fault is part of the major fault indicated in Figure 4 by a solid line immediately south- east of the Tarim Basin. Upper faults are smaller subsidiary faults. Center...
Journal Article
Published: 03 February 2015
Bulletin of the Seismological Society of America (2015) 105 (2A): 928–949.
...Guoxing Chen; Dandan Jin; Jiao Zhu; Jian Shi; Xiaojun Li Abstract Based on the parallel computing cluster platform of the ABAQUS software, a large‐scale 2D finite‐element refined nonlinear modeling approach was used to study seismic site effects in the Fuzhou basin, such as peak ground acceleration...
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Journal Article
Published: 01 February 2002
Bulletin of the Seismological Society of America (2002) 92 (1): 19–42.
... tip of the Sapanca fault segment significantly increases the transient stress on the adjoining Sakarya segment across the 1- to 2-km-wide Sapanca step-over, allowing rupture propagation across the basin. An evaluation of 30 historical strike-slip earthquakes involving 59 step-over basins supports our...
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Journal Article
Published: 02 January 2020
Seismological Research Letters (2020) 91 (2A): 936–947.
... thin lines are the provincial boundaries. White dashed lines represent the tectonic boundaries. MCB, Myanmar Central basin; SC block, South China block; SCB, Sichuan basin; SYR, Sichuan–Yunnan rhombic; YZC, Yangtze craton. Main active blocks: I, Tengchong block; II, Baoshan block; III, Simao block; IV...
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Journal Article
Published: 01 June 1996
Bulletin of the Seismological Society of America (1996) 86 (3): 683–690.
.... (1935) . Basin-Range faulting in Pleasant Valley, Nevada , J. Geol. 43 , 690 - 707 . Petersen M. D. Seeber L. Sykes L. R...
Journal Article
Published: 03 November 2021
Seismological Research Letters (2022) 93 (1): 21–32.
.... S2, model 3) from a surface‐wave tomography model in the Chuandian region ( Liu et al. , 2019 ), with shallow velocity adopted from the active source record in the nearby Binchuan basin ( Yang, Duan, et al. , 2021b ). The depth of Moho was inferred from receiver function results using a dense array...
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Journal Article
Published: 20 September 2024
Seismological Research Letters (2024) 95 (6): 3433–3448.
... margin of the Taichung basin, along the contact boundary between the western foothills and the western coastal plain. In this work, P ‐wave velocity is shown in Figure  2b ( Chen et al. , 1998 ). The pulse identification method ( Shahi and Baker, 2014 ) contains classification criteria...
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Journal Article
Published: 31 August 2021
Bulletin of the Seismological Society of America (2021) 111 (5): 2595–2616.
... of the seismic rupture and wave propagation, including directivity effects in near‐fault conditions, amplification effects in heavily sedimented basins, as well as topographic and complex site effects ( Smerzini and Pitilakis, 2018 ). Thus, the PBS has the potential for identifying and expanding our...
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Journal Article
Published: 13 October 2021
Seismological Research Letters (2022) 93 (1): 100–117.
... the application of the empirical Green’s function method. The original method can be applied to model directivity and basin effects. However, in its standard form, the method is not directly applicable to the modeling of nonlinear soil effects, because it is based on the linear superposition of the empirical...
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Journal Article
Published: 13 March 2023
Bulletin of the Seismological Society of America (2023) 113 (3): 976–996.
.... (2016) . The earthquake data were obtained from the China Earthquake Information Network. The trench locations were obtained from Guo, Han, Mao, et al. (2019 , 2020) . CMF, Changma fault; F1, Huangcheng‐Shuangta fault; F2, Southern Wuwei basin fault; F3, Minle‐Damaying fault; F4, Longshoushan fault...
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Journal Article
Published: 22 May 2024
Bulletin of the Seismological Society of America (2024) 114 (5): 2504–2523.
... and then stabilizes. Furthermore, the mean level of the inelastic attenuation factor Q s is 199.5 f 0.98 . Pertaining to site effects, we observe that at the edge of the Sichuan basin, the amplification of sites in the long‐period part is clearly characterized and tends to stabilize with increasing frequency...
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