scholarly journals Supplemental Material: Coseismic surface rupture during the 2018 Mw 7.5 Palu earthquake, Sulawesi Island, Indonesia

2020 ◽  
Author(s):  
Dengyun Wu ◽  
Zhikun Ren
Keyword(s):  
Field Investigation ◽  
Rupture Zone ◽  
Surface Rupture ◽  
Lateral Offset ◽  
Uav Images ◽  
Coseismic Offset

Table S1: Main coseismic offset locations of the Palu rupture zone; Table S2: Field investigation locations; Figure S1: UAV images and surface coseismic left-lateral offset distribution; Figure S2: Mirrored trench and interpretation; Figure S3: Relations between the surface rupture trace and the architecture of the Palu-Koro fault.

scholarly journals Supplemental Material: Coseismic surface rupture during the 2018 Mw 7.5 Palu earthquake, Sulawesi Island, Indonesia

2020 ◽  
Author(s):  
Dengyun Wu ◽  
Zhikun Ren
Keyword(s):  
Field Investigation ◽  
Rupture Zone ◽  
Surface Rupture ◽  
Lateral Offset ◽  
Uav Images ◽  
Coseismic Offset

Table S1: Main coseismic offset locations of the Palu rupture zone; Table S2: Field investigation locations; Figure S1: UAV images and surface coseismic left-lateral offset distribution; Figure S2: Mirrored trench and interpretation; Figure S3: Relations between the surface rupture trace and the architecture of the Palu-Koro fault.

Coseismic surface rupture during the 2018 Mw 7.5 Palu earthquake, Sulawesi Island, Indonesia

2020 ◽  
Author(s):  
Dengyun Wu ◽  
Zhikun Ren ◽  
Jinrui Liu ◽  
Jie Chen ◽  
Peng Guo ◽  
...  
Keyword(s):  
Slip Rate ◽  
Flower Structure ◽  
Surface Rupture ◽  
Sand Liquefaction ◽  
Field Surveys ◽  
The North ◽  
Field Investigations ◽  
Surface Ruptures ◽  
Lateral Offset ◽  
Coseismic Offset

Sulawesi Island is located at the triple junction between the converging Australian, Sunda, and Philippine plates. The magnitude (Mw) 7.5 Palu earthquake occurred on 28 September 2018 on Sulawesi Island and caused serious casualties. The causative fault of the Palu earthquake was the left-lateral, strike-slip Palu-Koro fault, which has a rapid slip rate. We experienced this earthquake in Palu City and conducted field investigations on coseismic surface ruptures 1 d after the earthquake. Field surveys revealed that the coseismic surface ruptures were characterized by left-lateral offset, en echelon tensional cracks, mole tracks within a narrow zone, and large areas of sand liquefaction that increased the damage and losses. We measured the coseismic displacements along surface ruptures and observed a maximum coseismic offset of ∼6.2 m. The rupture traces in the north Palu Basin near Palu City mark the previously unmapped Palu-Koro fault. Based on the field investigations, we determined the exact location of the Palu-Koro fault within the Palu Basin and found that the Palu-Koro fault zone can be divided into three branches: F1, F2, and F3, forming a typical flower structure.

scholarly journals Soil gas distribution in the main coseismic surface rupture zone of the 1980, M s  = 6.9, Irpinia earthquake (southern Italy)

2014 ◽  
Vol 119 (3) ◽  
pp. 2440-2461 ◽  
Author(s):  
Giancarlo Ciotoli ◽  
Sabina Bigi ◽  
Chiara Tartarello ◽  
Pietro Sacco ◽  
Salvatore Lombardi ◽  
...  
Keyword(s):  
Southern Italy ◽  
Soil Gas ◽  
Rupture Zone ◽  
Gas Distribution ◽  
Surface Rupture ◽  
Surface Rupture Zone

scholarly journals Coseismic fluid–rock interactions in the Beichuan-Yingxiu surface rupture zone of the Mw 7.9 Wenchuan earthquake and its implication for the fault zone transformation

2020 ◽  
Author(s):  
Yangyang Wang ◽  
Xiaoqi Gao ◽  
Sijia Li ◽  
Shiyuan Wang ◽  
Deyang Shi ◽  
...  
Keyword(s):  
Wenchuan Earthquake ◽  
Fault Zone ◽  
Structural Characteristics ◽  
Damage Zone ◽  
Major Elements ◽  
Rupture Zone ◽  
Surface Rupture ◽  
Fault Rock ◽  
Surface Rupture Zone ◽  
Geochemical Variations

Abstract. Mechanism of fluids in modifying mineralogy and geochemistry of the fault zone and the role of rock-fluid interaction in the faulting weakening is still debatable. Through analyzing mineralogical compositions, major elements as well as micro-structural characteristics of outcrop samples including wall rocks, low damage zone, high damage zone and oriented fault gouge samples from principal slip zone gouges, mineralogical and geochemical variations of the fault-rocks is observed from Shaba outcrop of Beichuan-Yingxiu surface rupture zone of the Mw 7.9 Wenchuan earthquake, China. The element enrichment/depletion pattern of fault rock shows excellent consistency with the variation pattern of minerals in terms of the notable feldspar alteration and decomposition, decarbonization, coseismic illitization, and chloritization that occurs in the fault zone. The Isocon analysis indicates that the overall mass loss amount of the Shaba fault zone is ranked as low damage zone 

scholarly journals Segmentation and termination of the surface rupture zone produced by the 1932 Ms 7.6 Changma earthquake: New insights into the slip partitioning of the eastern Altyn Tagh fault system

Lithosphere ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 19-39
Author(s):  
Jiaxin Du ◽  
Bihong Fu ◽  
Qiang Guo ◽  
Pilong Shi ◽  
Guoliang Xue ◽  
...  
Keyword(s):  
Slip Rate ◽  
Rupture Zone ◽  
Fault System ◽  
Surface Rupture ◽  
Altyn Tagh Fault ◽  
Slip Rates ◽  
Leading Role ◽  
Surface Rupture Zone ◽  
Altyn Tagh ◽  
Slip Partitioning

Abstract The 1932 Ms 7.6 earthquake struck the active Changma fault in the NE Tibetan Plateau, and produced a distinct surface rupture along the fault zone. However, the segmentation and termination of the surface rupture zone are still unclear. In this paper, the active tectonic analyses of multiple satellite images complemented by field investigations present the 120-km-long surface rupture zone, which can be divided into five discrete first-order segments, ranging from 14.4 to 39.56 km in length, linked by step-overs. Our results also indicate that the 1932 rupture zone could jump across step-overs 0.3–4.5 km long and 2.2–5.4 km wide in map view, but was terminated by a 6.3-km-wide restraining step-over at the eastern end. The left-lateral slip rates along the mid-eastern and easternmost segments of the Changma fault are 3.43 ± 0.5 mm/yr and 4.49 ± 0.5 mm/yr since 7–9 ka, respectively. The proposed tectonic models suggest that the slip rates on the Changma fault are similar to the slip rate on the eastern segment of the Altyn Tagh fault system near the junction point with the Changma fault. These results imply that the Changma fault plays a leading role in the slip partitioning of the easternmost segment of the Altyn Tagh fault system.

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