Evidence of Complex Faulting near the Huangcheng‐Shuangta Fault, Gansu, China, from the 11 May 2012<i>M</i><sub>w</sub> 4.8 Sunan Earthquake

Chen, Jifeng; Carpenter, N. Seth; Wang, Zhenming; Zuo, Kezhen; Yang, Liming

doi:10.1785/0120160094

Cited by 3 publications

(1 citation statement)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The NQF shows evidence for Cretaceous and Cenozoic activity (Li et al, ). Six major reverse faults comprise the Holocene‐active NQF system: Hanxia‐Dahaunggou, Yumen, Fodongmiao‐Hongyazi (Yang et al, ), Minle‐Damaying (this study), Huangcheng‐Shuangta (Chen et al, ; Zheng et al, ), and Lenglongling fault (Hu et al, ) (Figure a). Many of these, such as the MDF, are composed of multiple segments.…”

Section: Geological Settingmentioning

confidence: 84%

Segmented Thrust Faulting: Example From the Northeastern Margin of the Tibetan Plateau

Lei

Oskin

et al. 2020

JGR Solid Earth

View full text Add to dashboard Cite

Seismogenic faults are commonly composed of a series of segments, revealed by geometric barriers and along‐strike gradients in fault activity. At the northeastern margin of the Tibetan Plateau, the Minle‐Damaying Fault (MDF), bounding a portion of the eastern Qilian Shan, illustrates segmented paleoseismic behavior of a major seismogenic reverse fault. Field surveys, trench excavations, and drone‐surveyed topography along the MDF reveal scarps with diverse cumulative displacements. Multiple events, with timing constrained by radiocarbon dating, are identified by both trench exposures and analysis of deformed landforms. Both individual coseismic displacements and slip rates taper toward the ends, revealing repeated rupture of the western MDF segment. Not all events present at the center of this segment appear at sites closer to the fault tips, suggesting that some earthquakes did not everywhere rupture to the surface. Isolated rupture of the western segment would produce a Mw7.0 earthquake. However, we cannot rule out correlation of some paleo‐earthquakes between two segments, corresponding to larger events. A cluster of two 7‐m slip events occurred on the eastern segment in the past 1,000 years, one of which may correspond to a multisegment event.

show abstract

Section: Geological Settingmentioning

confidence: 84%

Segmented Thrust Faulting: Example From the Northeastern Margin of the Tibetan Plateau

Lei

Oskin

et al. 2020

JGR Solid Earth

View full text Add to dashboard Cite

show abstract

Determination of intraplate focal mechanisms with the Brazilian Seismic Network: A simplified Cut-and-Paste approach

Neto

Julià

2023

Journal of South American Earth Sciences

View full text Add to dashboard Cite

Research of Focal Mechanism and Focal Depth of Qilian, QinghaiM_s5.2 Earthquake

Gao

Yin

2019

E3S Web Conf.

View full text Add to dashboard Cite

This paper selects the waveform records of 16 broadband digital seismic stations in the regional seismic network of Gansu province, Qinghai province, and Sichuan province involved inversion, use CAP focal mechanism solution method to calculate the Ms 5.2 earthquake which occurred in Qilian County, Qinghai Province, November 23, 2015. Obtained the focal mechanism solution of this earthquake is a strike-slip fault with thrust property. The inversion results show the optimal double couple solution is nodal plane I: The strike is 112°, the dip, 51.7°; and the rake, 24.5°. Nodal plane II: The strike is 7°, the dip, 71°; and the rake, 139°. Earthquake moment magnitude is Mw5.2 and the optimal depth solution is 8km, which is consistent with the results of IGP-CEA. We calculate focal depth with the arrival time difference between sPn and Pn phases, the results is 6.6km, which agree with the CAP method results and verify the feasibility of this method.

show abstract

Evidence of Complex Faulting near the Huangcheng‐Shuangta Fault, Gansu, China, from the 11 May 2012M_w 4.8 Sunan Earthquake

Cited by 3 publications

References 16 publications

Segmented Thrust Faulting: Example From the Northeastern Margin of the Tibetan Plateau

Segmented Thrust Faulting: Example From the Northeastern Margin of the Tibetan Plateau

Determination of intraplate focal mechanisms with the Brazilian Seismic Network: A simplified Cut-and-Paste approach

Research of Focal Mechanism and Focal Depth of Qilian, QinghaiM_s5.2 Earthquake

Contact Info

Product

Resources

About

Evidence of Complex Faulting near the Huangcheng‐Shuangta Fault, Gansu, China, from the 11 May 2012Mw 4.8 Sunan Earthquake

Cited by 3 publications

References 16 publications

Segmented Thrust Faulting: Example From the Northeastern Margin of the Tibetan Plateau

Segmented Thrust Faulting: Example From the Northeastern Margin of the Tibetan Plateau

Determination of intraplate focal mechanisms with the Brazilian Seismic Network: A simplified Cut-and-Paste approach

Research of Focal Mechanism and Focal Depth of Qilian, QinghaiMs5.2 Earthquake

Contact Info

Product

Resources

About

Evidence of Complex Faulting near the Huangcheng‐Shuangta Fault, Gansu, China, from the 11 May 2012M_w 4.8 Sunan Earthquake

Research of Focal Mechanism and Focal Depth of Qilian, QinghaiM_s5.2 Earthquake