Yinhe Luo,1,2 Yingjie Yang,3 Yixian Xu,1,2 Hongrui Xu,1 Kaifeng Zhao1 and Kai Wang1 1Hubei Subsurface Multi-scale Imaging Lab (SMIL), Institute of Geophysics Geomatics, China University Geosciences, Wuhan, Hubei 430074, China. E-mail: luoyinhe@cug.edu.cn 2State Key Laboratory Geological Processes Mineral Resources, 3ARC Centre Excellence for Core to Crust Fluid Systems (CCFS)/GEMOC, Department Earth Planetary Sciences, Macquarie University, North Ryde, NSW 2109, Australia

Abstract With the advancement of dense seismic arrays, array‐processing methods for ambient noise data have become highly effective in extracting high‐quality broadband surface wave dispersion curves from noise. Recent advancements array processing enabled extraction multimode curves, offering improved constraints on deep Earth structures. However, these array‐based often produce regionalized and conventional phase velocity maps constructed by interpolating typically limited resolution,...

In this study, we image the crust and upper-mantle seismic velocity structures in South China using teleseismic Rayleigh waves recorded at 354 stations from Chinese provincial networks (CEArray). We process wave data 1087 events construct phase maps periods of 40–150 s. By combining dispersion curves 6–70 s Zhou et al. surface tomography a 3-D shear model upper mantle China. Distinct are revealed eastern part (including Fold System Yangtze Craton) to western Craton. The Craton characterized...

In this study, we demonstrate the feasibility of imaging broad-band (10–150 s) Rayleigh wave phase velocity maps on a continental scale using ambient noise tomography (ANT). We obtain waves from cross-correlations data between all station pairs USArray and measure dispersion curves these at period band 10–150 s. The large-scale dense enables us to over 500 000 surface paths which cover contiguous United States densely. Using paths, generate s periods. Our are similar other reported based...

Abstract Ambient noise tomography has become a popular method in the past two decades to image crust and uppermost mantle structure. To date, broadband Rayleigh wave signals can be obtained from ambient noise, which utilized study earth's interior structure surface down ∼200–300 km depths. However, it is hard extract intermediate‐ long‐period (>50 s) Love using conventional data processing techniques for noise. Array‐based enhance weak signals. In this study, we adopt modified algorithm...

Surface waves contain fundamental mode and higher modes, which could interfere with each other.If different modes are not properly separated, the inverted Earth structures using surface be biased.In this study, we apply linear radon transform (LRT) to synthetic seismograms real from USArray demonstrate effectiveness of LRT in separating fundamental-mode Love modes.Analysis on shows that two-station measurements reconstructed data obtained after separation can completely retrieve Love-wave...

Abstract Ambient-noise tomography (ANT) has become a well-established method to image the crust and uppermost mantle structures in past 15 yr. Having good estimate of uncertainties phase velocity dispersion measurements ANT is critical as they can guide level data fitting tomography. However, date, there are still no systemic studies evaluate these uncertainties. In this study, we obtain cross correlations with different stacking durations from 17 yr ambient-noise recorded at 120 stations...

Abstract We demonstrate the feasibility of finite frequency ambient noise tomography (ANT) in mapping broadband surface wave phase velocities western United States using data from USArray. obtain cross‐correlation functions (CCFs) between pairs stations and then construct a 2‐D sensitivity kernel for each CCF pair by treating one station as “virtual” point source other receiver. Based on standard, iterative, linearized inversion technique, we develop ANT method use this to velocity maps....

The Dabie–Sulu orogenic belt in China contains one of the largest exposures high and ultrahigh pressure (HP UHP) metamorphic rocks world. origin HP/UHP their exhumation to surface this have attracted great interest geologic community because study history helps understand process continental–continental collision tectonic evolution post-collision. However, mechanism is still contentious. In study, by deploying 28 broad-band seismic stations eastern Dabie combining data from 40 National...

Research Article| October 16, 2018 Systemic Comparison of Seismometer Horizontal Orientations Based on Teleseismic Earthquakes and Ambient‐Noise Data Hongrui Xu; Xu aHubei Subsurface Multi‐scale Imaging Key Laboratory, Institute Geophysics Geomatics, China University Geosciences, Wuhan, Hubei 430074, China, hongruixucug@126.comcctang@cug.edu.cnkaifeng.zhao@cug.edu.cn1749960222@qq.comyangxiaozhou@cug.edu.cn Search for other works by this author on: GSW Google Scholar Yinhe Luo; Luo bState...

Abstract In the past two decades or so, ambient noise tomography (ANT) has emerged as an established method for imaging subsurface seismic velocity structures. One of key steps in ANT is to extract surface-wave dispersion curves. The predominant approach shear-wave structure inversion involves utilizing fundamental-mode surface waves ANT. Nevertheless, a notable challenge encountered issue nonuniqueness when employing information invert models. inclusion higher-mode curves offers several...

Abstract As the junction of two important tectonic units, North China Craton and South Block, East‐Central has undergone multi‐period events, including Triassic continental collision Mesozoic Cenozoic subduction western Pacific plate, which forms unique crustal upper mantle structures in China. In this study, by jointly inverting body surface waves, we construct a high‐resolution 3D V s model at depths 0–800 km. Our results show that along eastern Qinling‐Dabie orogen formed past collision,...

SUMMARY Correlation of the coda Empirical Green's functions (EGFs) from ambient noise can be used to reconstruct EGFs between two seismic stations deployed different periods time. However, such method requires a number source in area surrounding pair asynchronous stations, which limit its applicability cases where there are not so many available stations. Here, we propose an alternative method, called two-station C2 uses one single station as virtual retrieve surface wave phase velocities...

Abstract Fundamental mode Love waves from earthquakes can be contaminated by higher modes, which affect the accuracy of phase velocity measurements. If such contaminations are not well dealt with, models Earth's interior structures based on could significantly biased. In this study, we develop an array‐based teleseismic wave tomography method that mitigate higher‐mode interference effects and therefore obtain more accurate phase‐velocity maps compared to previous studies. By applying our...

AbstractThe lithosphere is the rigid outer shell of Earth, composed crust and uppermost mantle. The lateral variation believed to be closely related foci intraplate earthquakes volcanism, location large ore deposits diamond-bearing kimberlites, formation oil/gas-bearing sedimentary basins. Understanding fine-scale structure therefore one most fundamental tasks in Earth sciences, has important implications for society terms economic prosperity hazard mitigation.Seismic tomography main...