Aftershocks of the 2014 South Napa, California, Earthquake: Complex Faulting on Secondary Faults

2016 ◽  
Vol 106 (3) ◽  
pp. 1100-1109 ◽  
Author(s):  
Jeanne L. Hardebeck ◽  
David R. Shelly
Keyword(s):  
Complex Faulting

scholarly journals Complex Faulting and Triggered Rupture During the 2018 MW7.9 Offshore Kodiak, Alaska, Earthquake

2018 ◽  
Vol 45 (15) ◽  
pp. 7533-7541 ◽  
Author(s):  
N. A. Ruppert ◽  
C. Rollins ◽  
A. Zhang ◽  
L. Meng ◽  
S. G. Holtkamp ◽  
...  
Keyword(s):  
Complex Faulting ◽  
Alaska Earthquake

The pyrenean earthquake of february 29, 1980: An example of complex faulting

1982 ◽  
Vol 85 (3-4) ◽  
pp. 273-290 ◽  
Author(s):  
J Gagnepain-Beyneix ◽  
H Haessler ◽  
T Modiano
Keyword(s):  
Complex Faulting

New Technology of Structure Framework Modeling for the Deposits with Complex Faulting

2008 ◽  
Author(s):  
Anton Sungurov ◽  
G. Sarkisov
Keyword(s):  
New Technology ◽  
Structure Framework ◽  
Complex Faulting

Anomalous co-seismic surface effects produced by the 2014 Mw 6.2 Ludian earthquake, Yunnan, China: An example of complex faulting related to Riedel shear structures

2020 ◽  
Vol 266 ◽  
pp. 105476 ◽  
Author(s):  
Jing Luo ◽  
Stephen G. Evans ◽  
Xiangjun Pei ◽  
Runqiu Huang ◽  
Ming Liu ◽  
...  
Keyword(s):  
Surface Effects ◽  
Ludian Earthquake ◽  
Shear Structures ◽  
Riedel Shear ◽  
Complex Faulting

Pedro Miguel Fault Investigations: Borinquen Dam 1e Construction and the Panama Canal Expansion

2018 ◽  
Vol 24 (1) ◽  
pp. 39-53 ◽  
Author(s):  
David L. Schug ◽  
Paul Salter ◽  
Christopher Goetz ◽  
Derek Irving
Keyword(s):  
Age Dating ◽  
Panama Canal ◽  
Geologic Mapping ◽  
Fault Rupture ◽  
The South ◽  
Dam Foundation ◽  
Rockfill Dam ◽  
Access Channel ◽  
Panama Canal Expansion ◽  
Complex Faulting

Abstract Borinquen Dam 1E is part of the new Pacific Access Channel (PAC) of the Panama Canal Expansion. The 2.3-km-long zoned rockfill dam forms the navigational channel providing navigation access from the Gaillard Cut to the new Post-Panamax Pacific Locks. A key geologic objective during construction was to confirm locations and activity of faults mapped at the dam during design, namely the Pedro Miguel Fault (PMF) and its suspected newly mapped “main trace.” The design allowed for core and filter widening at the anticipated location of the PMF at the south abutment and at a west branch of the PMF (believed to be the main active trace of the fault) mapped along the dam axis about one-third of the way north from the south abutment. As-built geologic mapping revealed complex faulting associated with the PMF crossing the southeast half of the foundation, the PAC, and the nearby Dam 1W foundation along a north-south trend. Trenching and age dating of alluvium overlying the faults crossing the Dam 1E foundation and overlying the PMF at Dam 1W indicated the unfaulted alluvium was latest Pleistocene to early Holocene age. At Dam 1E, the core and filters were widened to accommodate potential fault rupture on the PMF and a previously unrecognized fault revealed across the width of the dam foundation. The west branch of the PMF (trenched and mapped during design investigations) was determined to not exist at Dam 1E based on mapping the dam foundation and other extensive excavations created for the PAC.

scholarly journals Constraints on Complex Faulting during the 1996 Ston–Slano (Croatia) Earthquake Inferred from the DInSAR, Seismological, and Geological Observations

2020 ◽  
Vol 12 (7) ◽  
pp. 1157 ◽  
Author(s):  
Marin Govorčin ◽  
Marijan Herak ◽  
Bojan Matoš ◽  
Boško Pribičević ◽  
Igor Vlahović
Keyword(s):  
Maximum Stress ◽  
Field Studies ◽  
Fault Rupture ◽  
Stress Release ◽  
Ground Displacement ◽  
Lateral Component ◽  
Fringe Patterns ◽  
The Town ◽  
Additional Constraints ◽  
Complex Faulting

This study, involving remote sensing, seismology, and geology, revealed complex faulting during the mainshock of the Ston–Slano earthquake sequence (5 September, 1996, Mw = 6.0). The observed DInSAR interferogram fringe patterns could not be explained by a single fault rupture. Geological investigations assigned most of the interferogram features either to previously known faults or to those newly determined by field studies. Relocation of hypocentres and reassessment of fault mechanisms provided additional constraints on the evolution of stress release during this sequence. Available data support the scenario that the mainshock started with a reverse rupture with a left-lateral component on the Slano fault 4.5 km ESE of Slano, at the depth of about 11 km. The rupture proceeded unilaterally to the NW with the velocity of about 1.5 km/s for about 11 km, where the maximum stress release occurred. DInSAR interferograms suggest that several faults were activated in the process. The rupture terminated about 20 km away from the epicentre, close to the town of Ston, where the maximum DInSAR ground displacement reached 38 cm. Such a complicated and multiple rupture has never before been documented in the Dinarides. If this proves to be a common occurrence, it can pose problems in defining realistic hazard scenarios, especially in deterministic hazard assessment.

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