Risheng Chu
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View article: PKIKP Phase Back‐Projection and Its Application on Southern Hemisphere Earthquake Imaging
PKIKP Phase Back‐Projection and Its Application on Southern Hemisphere Earthquake Imaging Open
Standard Back‐Projections (BPs) use P phase recordings at large aperture arrays within teleseismic distances (30°–90°) to image earthquake sources. However, the majority of sizable arrays are in the northern hemisphere, leaving many southe…
View article: Multi-fault rupturing of the 2019 Mw4.6 Rongxian shallow earthquake in the Sichuan Basin, China and its implication for hazard analysis
Multi-fault rupturing of the 2019 Mw4.6 Rongxian shallow earthquake in the Sichuan Basin, China and its implication for hazard analysis Open
View article: A stagnant slab in the lower mantle transition zone beneath the northeast Asia continental margin: seismogenesis of a large deep outboard earthquake
A stagnant slab in the lower mantle transition zone beneath the northeast Asia continental margin: seismogenesis of a large deep outboard earthquake Open
SUMMARY The mantle transition zone (MTZ) plays an important role in the global material circulation, slab dynamics and seismogenesis of deep earthquakes in subduction zones. Here we construct fine MTZ structures of both P and SH waves bene…
View article: Extent and Mechanisms of the North China Craton Lithospheric Destruction Revealed by Multi‐Geophysical Inversions
Extent and Mechanisms of the North China Craton Lithospheric Destruction Revealed by Multi‐Geophysical Inversions Open
The North China Craton (NCC) has undergone significant destruction, yet the spatial extent and underlying mechanisms of the destruction remain subjects of debate. In this study, we conduct a joint inversion by integrating multiple geophysi…
View article: An Enhanced Focal Mechanism Catalog of Induced Earthquakes in Weiyuan, Sichuan, from Dense Array Data and a Multitask Deep Learning Model
An Enhanced Focal Mechanism Catalog of Induced Earthquakes in Weiyuan, Sichuan, from Dense Array Data and a Multitask Deep Learning Model Open
Determining focal mechanisms of abundant small-magnitude (M < 3) earthquakes can better reveal subsurface fault structures and stress features, but it remains challenging due to insufficient records or inefficient methods. In the past d…
View article: Identification of senescence-related hub genes in cerebral ischemia-reperfusion cells by comprehensive transcriptome analysis
Identification of senescence-related hub genes in cerebral ischemia-reperfusion cells by comprehensive transcriptome analysis Open
View article: Automatic determination of focal depth with the optimal period of Rayleigh wave amplitude spectra and uncertainty assessment in 3D velocity model
Automatic determination of focal depth with the optimal period of Rayleigh wave amplitude spectra and uncertainty assessment in 3D velocity model Open
Focal depth of earthquakes is essential for studies of seismogenic processes and seismic hazards. Surface waves are usually the strongest seismic phases at local and regional distances, and its excitation is sensitive to source depth. We o…
View article: Ice plate deformation and cracking revealed by an in situ-distributed acoustic sensing array
Ice plate deformation and cracking revealed by an in situ-distributed acoustic sensing array Open
Studying seismic sources and wave propagation in ice plates can provide valuable insights into understanding various processes, such as ice structure dynamics, migration, fracture mechanics and mass balance. However, the harsh environment …
View article: The 2023 <i>M</i><sub>w</sub> 6.8 Adassil Earthquake (Chichaoua, Morocco) on a steep reverse fault in the deep crust and its geodynamic implications
The 2023 <i>M</i><sub>w</sub> 6.8 Adassil Earthquake (Chichaoua, Morocco) on a steep reverse fault in the deep crust and its geodynamic implications Open
The Mw 6.8 Adassil earthquake that occurred in the High Atlas on September 8, 2023, was a catastrophic event that provided a rare opportunity to study the mechanics of deep crustal seismicity. This research aimed to decipher the rupture ch…
View article: The overall-subshear and multi-segment rupture of the 2023 Mw7.8 Kahramanmaraş, Turkey earthquake in millennia supercycle
The overall-subshear and multi-segment rupture of the 2023 Mw7.8 Kahramanmaraş, Turkey earthquake in millennia supercycle Open
On February 6, 2023, an Mw7.8 earthquake hit the East Anatolian Fault (EAF) and Narlı Fault (NF), followed by an Mw7.5 event on the Sürgü Fault. We combine multiple seismic datasets, global navigation satellite system recordings, and radar…
View article: The 2023 Mw7.8 Kahramanmaraş, Turkey Earthquake: A Multi-segment Rupture in A Millennium Supercycle
The 2023 Mw7.8 Kahramanmaraş, Turkey Earthquake: A Multi-segment Rupture in A Millennium Supercycle Open
An Mw 7.8 earthquake occurred on the East Anatolian Fault (EAF) and the secondary Narlı Fault (NF) on Feb 6, 2023, closely followed by an Mw 7.5 event on the Sürgü Fault 9 hours later. We analyze the distant and local seismic data, high-ra…
View article: Comment on tc-2023-26
Comment on tc-2023-26 Open
Abstract. The study of seismic sources and wave propagation in ice plate is helpful to understand the structure, migration, fracture mechanics, mass balance and other processes. However, due to extreme environment, in-situ…
View article: Supplementary material to "Ice plate deformation and cracking revealed by an in-situ distributed acoustic sensing array"
Supplementary material to "Ice plate deformation and cracking revealed by an in-situ distributed acoustic sensing array" Open
View article: Ice plate deformation and cracking revealed by an in-situ distributed acoustic sensing array
Ice plate deformation and cracking revealed by an in-situ distributed acoustic sensing array Open
The study of seismic sources and wave propagation in ice plate is helpful to understand the structure, migration, fracture mechanics, mass balance and other processes. However, due to extreme environment, in-situ dense seismic observations…
View article: The 2021 Mw 7.3 East Cape Earthquake: Triggered Rupture in Complex Faulting Revealed by Multi‐Array Back‐Projections
The 2021 Mw 7.3 East Cape Earthquake: Triggered Rupture in Complex Faulting Revealed by Multi‐Array Back‐Projections Open
On 04 March 2021 the Mw 7.3 East Cape, New Zealand earthquake occurred at the southern end of the Kermadec Trench. The United States Geological Survey W‐phase solution shows an unexpected focal mechanism compared to historical earthquakes.…
View article: Rupture Heterogeneity and Directivity Effects in Back‐Projection Analysis
Rupture Heterogeneity and Directivity Effects in Back‐Projection Analysis Open
The back projection method is a tremendously powerful technique for investigating the time dependent earthquake source, but its physical interpretation is elusive. We investigate how earthquake rupture heterogeneity and directivity can aff…
View article: Donald V. Helmberger, the master mentor: Testimonials from former international students
Donald V. Helmberger, the master mentor: Testimonials from former international students Open
View article: Stress drops of induced earthquakes in the Weiyuan shale gas reservoir in southwestern China
Stress drops of induced earthquakes in the Weiyuan shale gas reservoir in southwestern China Open
The zip file contains three component waveform data of induced earthquakes larger than ML 1.5, recorded by dense seismic array in the Weiyuan shale gas block in China. In Chu and Sheng (2022), these data are used for calculation of earthqu…
View article: Earthquakes triggered by fluid diffusion and boosted by fault reactivation in Weiyuan, China due to hydraulic fracturing
Earthquakes triggered by fluid diffusion and boosted by fault reactivation in Weiyuan, China due to hydraulic fracturing Open
The zip file contains waveform data for a refined earthquake catalog built by Sheng et al. (2021), recorded by dense seismic array in the Weiyuan shale gas block in China. Each directory includes one earthquake.
View article: Machine-learning-facilitated earthquake and anthropogenic source detections near the Weiyuan Shale Gas Blocks, Sichuan, China
Machine-learning-facilitated earthquake and anthropogenic source detections near the Weiyuan Shale Gas Blocks, Sichuan, China Open
Seismic hazard assessment and risk mitigation depend critically on rapid analysis and characterization of earthquake sequences. Increasing seismicity in shale gas blocks of the Sichuan Basin, China, has presented a serious challenge to mon…
View article: Template matching for simple waveforms with low signal-to-noise ratio and its application to icequake detection*
Template matching for simple waveforms with low signal-to-noise ratio and its application to icequake detection* Open
Template matching is a useful method to detect seismic events through waveform similarity between two signals. The traditional template matching method works well in detecting small tectonic earthquakes. However, the method has some diffic…
View article: Analysis of the 2017 June Maoxian landslide processes with force histories from seismological inversion and terrain features
Analysis of the 2017 June Maoxian landslide processes with force histories from seismological inversion and terrain features Open
SUMMARY A devastating landslide occurred in Maoxian (China) on 2017 June 24, which generated strong signals that were recorded by a regional seismic network. We determined the landslide force history from long-period seismic waves and iden…
View article: Induced or triggered? The deadly February 2019 Rongxian-Weiyuan ML 4.9 earthquake in the shale gas field in Sichuan, China
Induced or triggered? The deadly February 2019 Rongxian-Weiyuan ML 4.9 earthquake in the shale gas field in Sichuan, China Open
<p>Coinciding with the extensive hydraulic fracturing activities in the southern Sichuan basin, seismicity in the region has surged in the past a few years, including a number of earthquakes with magnitudes larger than 5. On 25 Febru…
View article: Rupture processes and Coulomb stress changes of the 2017 Mw 6.5 Jiuzhaigou and 2013 Mw 6.6 Lushan earthquakes
Rupture processes and Coulomb stress changes of the 2017 Mw 6.5 Jiuzhaigou and 2013 Mw 6.6 Lushan earthquakes Open
Since the 2008 great M w 7.9 Wenchuan earthquake, two destructive earthquakes, the 2013 M w 6.6 Lushan earthquake and the 2017 M w 6.5 Jiuzhaigou earthquake, struck the eastern margin of the Tibetan Plateau, causing many casualties and sig…
View article: Inversion of source parameters for slidequakes on the Xishancun Landslide, Sichuan, China
Inversion of source parameters for slidequakes on the Xishancun Landslide, Sichuan, China Open
View article: Upper-mantle velocity structures beneath the Tibetan Plateau and surrounding areas inferred from triplicated P waveforms
Upper-mantle velocity structures beneath the Tibetan Plateau and surrounding areas inferred from triplicated P waveforms Open
P-wave waveforms in the distance range between 12° and 30° were analyzed to investigate upper-mantle P velocity structures beneath the Tibetan Plateau and surrounding areas. The waveform data from 504 earthquakes with magnitudes larger tha…
View article: Receiver function HV ratio: a new measurement for reducing non-uniqueness of receiver function waveform inversion
Receiver function HV ratio: a new measurement for reducing non-uniqueness of receiver function waveform inversion Open
It is known that a receiver function has relatively weak constraint on absolute seismic wave velocity, and that joint inversion of the receiver function with surface wave dispersion has been widely applied to reduce the trade-off of veloci…
View article: Accuracy of the water column approximation in numerically simulating propagation of teleseismic<i>PP</i>waves and Rayleigh waves
Accuracy of the water column approximation in numerically simulating propagation of teleseismic<i>PP</i>waves and Rayleigh waves Open
Numerical solvers of wave equations have been widely used to simulate global seismic waves including PP waves for modelling 410/660 km discontinuity and Rayleigh waves for imaging crustal structure. In order to avoid extra computation cost…