A5078870362- earthquake and tectonic studies
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Geological and Geochemical Analysis
- Seismology and Earthquake Studies
- Geological and Geophysical Studies
- Landslides and related hazards
- Earthquake Detection and Analysis
- High-pressure geophysics and materials
- Geology and Paleoclimatology Research
- Flood Risk Assessment and Management
- Seismic Waves and Analysis
- Cryospheric studies and observations
- Sphingolipid Metabolism and Signaling
- Seismic Imaging and Inversion Techniques
- Erythrocyte Function and Pathophysiology
- Zebrafish Biomedical Research Applications
- Tree Root and Stability Studies
- Carbohydrate Chemistry and Synthesis
- Methane Hydrates and Related Phenomena
- Structural Health Monitoring Techniques
- Glycosylation and Glycoproteins Research
- Geophysical Methods and Applications
- Geophysics and Gravity Measurements
- Platelet Disorders and Treatments
- Soil erosion and sediment transport
National Taiwan University
2010-2025
Academia Sinica
2025
Institute of Earth Sciences, Academia Sinica
2019-2024
Earth Observatory of Singapore
2019
Nanyang Technological University
2019
GGG (France)
2016-2018
California Institute of Technology
2008-2015
Institute of Biological Chemistry, Academia Sinica
2008-2012
On 25th January 2019, the tailings dam of Brumadinho iron mine operated by Vale S/A failed catastrophically. The death toll stood at 259 and 11 people remained missing as 2020. This tragedy occurred three years after Mariana's rupture – most significant tailing disaster in Brazilian history. Thus far, a systematic investigation on cause effect failure has yet to be conducted. Here, we use satellite-driven soil moisture index, multispectral high-resolution imagery Interferometric Synthetic...
Spatial and temporal variations of pressure, temperature, water vapor content in the atmosphere introduce significant confounding delays interferometric synthetic aperture radar (InSAR) observations ground deformation bias estimates regional strain rates. Producing robust tropospheric remains one key challenges increasing accuracy measurements using InSAR. Recent studies revealed efficiency global atmospheric reanalysis to mitigate impact delays, motivating further exploration their...
Abstract Observations of coseismic and postseismic deformation associated with the 2010 Mw = 8.8 Maule earthquake in south‐central Chile provide constraints on spatial heterogeneities frictional properties a major subduction megathrust how they have influenced seismic rupture effects. We find that bulk slip occurs within single elongated patch approximately 460 km long 100 wide between depths 15 40 km. infer three patches afterslip: one extends northward along strike downdip 60 depth; other...
When targeting small amplitude surface deformation, using repeat orbit Interferometric Synthetic Aperture Radar (InSAR) observations can be plagued by propagation delays, some of which correlate with topographic variations. These topographically‐correlated delays result from temporal variations in vertical stratification the troposphere. An approximate model assuming a linear relationship between topography and interferometric phase has been used to correct success few studies. Here, we...
We present a new approach to extracting spatially and temporally continuous ground deformation fields from interferometric synthetic aperture radar (InSAR) data. focus on unwrapped interferograms single viewing geometry, estimating along the line‐of‐sight. Our is based wavelet decomposition in space general parametrization time. refer this as MInTS (Multiscale InSAR Time Series). The efficiently deals with commonly seen spatial covariances repeat‐pass measurements, since coefficients of...
Interferometric synthetic aperture radar (InSAR) has become an important geodetic tool for measuring deformation of Earth's surface due to various geophysical phenomena, including slip on earthquake faults, subsurface migration magma, slow‐moving landslides, movement shallow crustal fluids (e.g., water and oil), glacier flow. Airborne spaceborne (SAR) instruments transmit microwaves toward detect the returning reflected waves. The phase returned wave depends distance between satellite...
Abstract. On 15 February 2022, the city of Petrópolis in highlands state Rio de Janeiro, Brazil, received an unusually high volume rain within 3 h (258 mm), generated by a strongly invigorated mesoscale convective system. It resulted flash floods and subsequent landslides that caused deadliest landslide disaster recorded Petrópolis, with 231 fatalities. In this paper, we analyzed root causes key triggering factors assessing spatial relationship occurrence various environmental factors....
Sudden breaching of a saddle dam on July 23, 2018, the perimeter Xe Nammoy hydroelectric-power reservoir, recently constructed in Mekong basin, southern Laos, caused catastrophic flooding that resulted fatalities and displaced thousands individuals. This study aims to (1) assess cause breach, (2) understand hydrologic geomorphic impact flood. Our analysis shows collapse occurred as reservoir was nearly full, water level rising against inner slope earthen dam. As discharged through we...
Abstract Nearby faults interact through stress changes induced by fault slip and viscoelastic flow. The process is, however, often elusive can be geometry-dependent time-variant. Here, we combine geodetic field observations to characterize the interaction of two head-to-head, conjugate in eastern Taiwan during 2022 Chihshang earthquake sequence. We map coseismic on Central Range dynamically-triggered shallow Longitudinal Valley fault, which has been creeping interseismically. Overlapping...
In this study we explored the application of synthetic aperture radar (SAR) intensity time series for urban flood detection. Our test case was in Lumberton, North Carolina, USA, caused by landfall Hurricane Matthew on 8 October 2016, which airborne imagery—taken same day as SAR overpass—is available validation our technique. To map flood, first carried out normalization observations, based statistics from series, and then construct a Bayesian probability function decrease (due to specular...
Abstract It has been observed that when using sea levels derived from GPS (Global Positioning System) signal-to-noise ratio (SNR) data to perform tidal analysis, the luni-solar semidiurnal (K2) and diurnal (K1) constituents are biased due geometrical errors in reflection data, which result their periods coinciding with orbital period revisit period. In this work, we use 18 months of GNSS SNR multiple frequencies constellations at three sites further investigate biases how mitigate them. We...
Discrete scarps that are created or reactivated during large earthquakes a locus of concentrated hazard. A number the coseismic activated in 1999 Chi‐Chi earthquake actually fold scarps, which display several types ground deformation characterized by localized folding and distinct from classic fault form cutting surface. This paper documents analyzes formed Taiwan earthquake. Our results show can be generally divided into two types: (1) those associated with ahead tip blind thrust at shallow...
The 1762 Arakan earthquake resulted from rupture of the northern Sunda megathrust and is one those rare preinstrumental earthquakes for which early historical accounts document ground deformations. In order to obtain more comprehensive detailed measurements coseismic uplift, we conducted field investigations geochronological analyses marine terraces on two largest islands in western Myanmar. We confirm 3–4 m coastal emergence along southwestern Cheduba Island, diminishing northeastward less...
Abstract We present a reconstructed lithologic column compiled from series of lacustrine outcrops along tributary the Nyang River, major Yarlung-Tsangpo in southeast Tibet. The deposits were preserved between terraces at altitudes 2950–3100 m asl. stratigraphic record features least two sets coarsening-upward sequences depicting episodic aggradation and progradation glacially dammed lake related delta. Recognized facies changes illustrate evolution cycles depositional environments pro-delta,...
In this paper, we address the impact of agricultural expansion on hydrological patterns water and sediment budget in one largest floodplains along Cambodian Mekong since 1980s, using field (water level, discharge, sediment, rainfall, groundwater level) remote sensing (land use, surface suspended sediment) data, numerical simulations. Specifically, while both concentration level River around Kampong Cham Neak Luong decreased, floodplain seasonal storage increased. addition, rate input from...
Understanding the impact of hydrological uncertainty on soil slope stability is crucial for assessing failure risks in heterogeneous terrains. This study aims to investigate how heterogeneity hydraulic properties influences and groundwater dynamics.A total 3,500 realizations conductivity fields were generated, with heterogeneities inclined at a 20-degree dip mimic realistic subsurface conditions. To generate stochastic fields, we employed Gaussian random field model specified mean, variance,...
Eastern Taiwan is located in the transition zone where Philippine Sea plate subducts beneath Yangtze along Ryukyu Trench and collides with continental margin Longitudinal Valley suture zone. These complex tectonic interactions have led to frequent devastating earthquakes. The GNSS-acoustic measurements southernmost characterize an eastward growing convergence rate from 92 mm/yr offshore Hualien 123 near Gagua Ridge, suggesting a capability of hosting Mw 7.5-8.4 Along Valley, east-dipping...
Hutchinson-Gilford progeria syndrome (HGPS) is a rare laminopathy that produces mutant form of prelamin A, known as Progerin, resulting in premature aging. HGPS cells show morphological abnormalities the nuclear membrane, reduced cell proliferation rates, accumulation reactive oxygen species (ROS), and expression senescence markers. Lysophosphatidic acid (LPA) growth factor-like lipid mediator regulates various physiological functions via activating multiple LPA G protein-coupled receptors....
A quarry failure along the slopes of Wai Khar open-pit jade mine in Hpakant, Myanmar has led to deaths at least 172 miners on 2 July 2020. This paper conducts a systematic investigation incident by integrating data from multiple sensors, including high-resolution optical imagery, Sentinel-1 synthetic aperture radar (SAR) images, unmanned aerial system (UAS) footage, SRTM and ALOS digital elevation models (DEMs), soil moisture product multi-spectral Landsat-8 satellite precipitation records...
Rapid urbanization and population growth in Hanoi city raise the demand for groundwater risk of land subsidence. This study is first to conduct a long-term interferometric synthetic aperture radar (InSAR) analysis with different SAR sensors including ALOS, COSMO-SkyMed Sentinel-1 evaluate spatiotemporal evolution subsidence between 2007 2018. The results show that Central had been diminishing during these 12 years, while southern western outskirts (Ha Dong Hoai Duc district) become hot spots...