A5091105626- earthquake and tectonic studies
- High-pressure geophysics and materials
- Seismic Waves and Analysis
- Seismology and Earthquake Studies
- Geological and Geochemical Analysis
- Seismic Imaging and Inversion Techniques
- Earthquake Detection and Analysis
- Landslides and related hazards
- Cryospheric studies and observations
- Remote Sensing and Land Use
- Geophysics and Sensor Technology
- Geological and Geophysical Studies
- Geophysics and Gravity Measurements
- Hydrocarbon exploration and reservoir analysis
- Reservoir Engineering and Simulation Methods
- Methane Hydrates and Related Phenomena
- Soil Moisture and Remote Sensing
- Structural Health Monitoring Techniques
- Acoustic Wave Resonator Technologies
- Precipitation Measurement and Analysis
- Seismic Performance and Analysis
- Tree Root and Stability Studies
- Hydraulic Fracturing and Reservoir Analysis
- Arctic and Antarctic ice dynamics
- Flood Risk Assessment and Management
Chinese Academy of Sciences
2016-2025
Institute of Geodesy and Geophysics
2016-2025
University of Chinese Academy of Sciences
2020-2024
University of Batna 1
2024
State Key Laboratory of Geodesy and Earth's Dynamics
2016-2022
Northeast Petroleum University
2018-2019
Innovation Team (China)
2018
California Institute of Technology
2009-2014
Saint Louis University
2009
Geophysical observations from the 2011 moment magnitude (M(w)) 9.0 Tohoku-Oki, Japan earthquake allow exploration of a rare large event along subduction megathrust. Models for this indicate that distribution coseismic fault slip exceeded 50 meters in places. Sources high-frequency seismic waves delineate edges deepest portions and do not simply correlate with locations peak slip. Relative to M(w) 8.8 2010 Maule, Chile earthquake, Tohoku-Oki was deficient radiation--a difference we attribute...
Abstract On February 6, 2023, an Mw7.8 earthquake hit the East Anatolian Fault (EAF) and Narlı (NF), followed by Mw7.5 event on Sürgü Fault. We combine multiple seismic datasets, global navigation satellite system recordings, radar images with finite fault inversion slowness enhanced back-projection to study rupture kinematics. Our analysis reveals that originated NF, propagating 120 km northeast at 3.05 km/s 200 southwest 3.11 after reaching EAF junction, exhibiting overall subshear speeds....
Abstract The ongoing convergence between the Indian and Eurasian plates has caused significant lithospheric shortening eastward expansion of Tibetan Plateau. Southeastern Plateau (SETP), bordered by Yangtze craton to east subduction plate beneath Myanmar southwest, plays a crucial role in accommodating this lateral growth. In study, we construct new upper mantle S ‐wave velocity model SETP jointly inverting broadband (5–140 s) surface wave dispersion curves teleseismic traveltimes. Our...
A recent prospective on the Yellowstone Caldera discounts its explosive potential based inferences from tomographic studies which suggests a high degree of crystallization underlying magma body. In this study, we show that many first teleseismic P ‐wave arrivals observed at seismic stations edge caldera did not travel through body but have taken longer faster paths around edge. After applying number waveform modeling tools, obtain much lower velocities than previous studies, 2.3 km/sec ( V p...
We developed a sliding-window cross-correlation (SCC) detection technique and applied the to continuous waveforms recorded by Cooperative New Madrid Seismic Network stations following 18 April 2008 Illinois earthquake.The detected more than 120 aftershocks down M L 1.0 in 2 week time window mainshock, which is three times number of reported seismic network.Most happened within 24 hrs mainshock.We then relocated all events double-difference relocation algorithm.Accurate P-and S-wave...
Abstract Earthquakes rarely occur at extremely shallow depths, for example, less than 2 km. Even induced earthquakes that are typically shallower tectonic events, only very small ones have been reported in such depths. The ML 4.9 earthquake (Mw 4.3) struck the Rongxian County, Sichuan, China on 25 February 2019 was an event. Seismological and geodetic data constrained mainshock depth ∼1 km with a thrust-faulting mechanism, consistent Molin fault orienting northwest. Two foreshocks magnitudes...
Abstract Hydraulic fracturing has induced small‐to‐moderate‐size earthquakes around the world. Identifying spatio‐temporal evolution of microseismicity is important for understanding physical processes that control hydraulic fracturing‐induced seismicity. In this study, we build an enhanced earthquake catalog from continuous seismic data recorded by 1‐year temporary deployment with automatic procedure and relocate 18,663 in Weiyuan shale gas block southern Sichuan Basin, China. Our catalog,...
Abstract The back projection method is a tremendously powerful technique for investigating the time dependent earthquake source, but its physical interpretation elusive. We investigate how rupture heterogeneity and directivity can affect back‐projection results (imaged location beam power) using synthetic models. Rather than attempting to model dynamics of any specific real earthquake, we use idealized kinematic models, with constant or varying velocity, peak slip rate, fault‐local strike...
Abstract Stress features, particularly local stress field and earthquake drops, are important to understand mechanism of induced earthquakes. Since shale gas exploitations in 2015, the Weiyuan block has experienced frequent In this paper, we determine focal mechanisms 257 events with M L > 1.5 by fitting three‐component waveforms, invert for direction maximum horizontal two dense clusters, then calculate drops 17 earthquakes moment magnitudes between 2.2 2.75 through spectral ratio...
Upper mantle seismic velocity structures in both vertical and horizontal directions are key to understanding the structure mechanics of tectonic plates. Recent deployment USArray Transportable Array (TA) Midwestern United States provides an extraordinary regional earthquake data set investigate such beneath stable North American craton. In this paper, we choose M w 5.1 Canadian Quebec area, which is recorded by about 400 TA stations, examine P wave between depths 150 km 800 km. Three smaller...
Abstract On 7 September 2019, an M L 5.4 earthquake struck the Weiyuan area in southwestern China. This is largest and most damaging event shale gas field. In next 4 months, two earthquakes with 4.3 5.2 rattled same area. this study, we obtain source parameters of these (e.g., centroid location, focal mechanism, rupture directivity) to investigate whether they are induced by hydraulic fracturing production. We first invert for high‐resolution locations mechanisms ~ 3 recorded a temporary...
Abstract An Mw 7.8 earthquake occurred on the East Anatolian Fault (EAF) and secondary Narlı (NF) Feb 6, 2023, closely followed by an 7.5 event Sürgü 9 hours later. We analyze distant local seismic data, high-rate GPS recordings, radar satellite images Slowness Enhanced Back-Projection joint Finite Inversion for to resolve its rupture process. The first initiates propagates NF. After reaching junction with EAF, it bilaterally extending 120 km northeast at 3.05 km/s 200 southwest 3.11 km/s....
Abstract The North China Craton (NCC) has undergone significant destruction, yet the spatial extent and underlying mechanisms of destruction remain subjects debate. In this study, we conduct a joint inversion by integrating multiple geophysical data sets to establish an unprecedented large‐scale compositional structure NCC lithospheric mantle. By incorporating thickness constrained thermal state, provide comprehensive assessment intensity destruction. Our results reveal variations in mantle...
We developed a new method to determine earthquake source time functions and focal depths. It uses theoretical Green's function time‐domain deconvolution with positivity constraint estimate the from teleseismic P waveforms. The depth is also determined in process by using separations of direct phases. applied this 606 earthquakes between 1990 2005 Central Asia. results show that Centroid Moment Tensor solutions, which are routinely computed for larger than M 5.0 globally very long period body...
Seismic hazard assessment and risk mitigation depend critically on rapid analysis characterization of earthquake sequences. Increasing seismicity in shale gas blocks the Sichuan Basin, China, has presented a serious challenge to monitoring managing itself. In this study, detect events we apply machine-learning-based phase picker (PhaseNet) continuous seismic data collected between November 2015 2016 from temporary network covering Weiyuan Shale Gas Blocks (SGB). Both P- S-phases are picked...
The <italic>M</italic><sub>w</sub> 6.8 Adassil earthquake that occurred in the High Atlas on September 8, 2023, was a catastrophic event provided rare opportunity to study mechanics of deep crustal seismicity. This research aimed decipher rupture characteristics by analyzing teleseismic waveform data conjunction with interferometric synthetic aperture radar (InSAR) observations from both ascending and descending orbits. Our analysis revealed reverse fault mechanism centroid depth...
Seismic tomography images of the upper mantle structures beneath Pacific Northwestern United States display a maze high‐velocity anomalies, many which produce distorted waveforms evident in USArray observations indicative Juan de Fuca (JdF) slab. The inferred location slab agrees quite well with existing contour lines defining slab's interface. Synthetic generated from recent image fit teleseismic travel times and also some waveform distortions. Regional earthquake data, however, require...