Abstract We report a rarely observed case of steady aseismic deformation in the context fold-and-thrust belt, with well-documented structural and lithological background. focus on 12-km-long section across foothills southwestern Taiwan, where about 23 mm/yr westward compression is observed. From west to east, surface geological structures include an anticline, thrust backthrust. determine Holocene uplift rates based fluvial terraces, invert interseismic 3D velocity field using existing...

This study proposes a workflow that enables the accurate identification of earthquake-induced damage zones by using coherence image pairs Sentinel-1 satellite before and after an earthquake event. The uses interferometric synthetic aperture radar (InSAR) processing to account for variations between coseismic preseismic pairs. difference two is useful information detect specific disasters in regional-scale area To remove background effects such as atmospheric effect ordinal surface changes,...

Research Article| October 24, 2018 Insights into Seismogenic Deformation during the Hualien, Taiwan, Earthquake Sequence from InSAR, GPS, and Modeling Jiun‐Yee Yen; Yen aDepartment of Natural Resource Environmental Studies, National Dong Hwa University, No. 1, Section 2, Da Hsueh Road, Shoufeng, Hualien 97401, jyyen@gms.ndhu.edu.tw Search for other works by this author on: GSW Google Scholar Chih‐Heng Lu; Lu bInstitute Applied Geology, Central 300, Zhongda Zhongli District, Taoyuan City...

Over the past 50 years, Choushui River Fluvial Plan (CRFP) has been plagued by land subsidence caused excessive groundwater extraction in central Taiwan. While many geodetic techniques have successfully monitored surface deformation this area, high spatiotemporal resolution data on vertical remains insufficient. Thanks to observation frequency and moderate spatial of Sentinel-1 satellite series, combined with well-developed multi-temporal InSAR (MTI) analysis techniques, limitation gradually...

We report a rarely observed case of steady aseismic deformation in the context fold-and-thrust belt, with well-documented structural and lithological background. focus on 12-km-long section across foothills southwestern Taiwan, where about 23 mm/yr westward compression is observed. From west to east, surface geological structures include an anticline, thrust backthrust. determine Holocene uplift rates based fluvial terraces, invert interseismic 3D velocity field using existing geodetic...

Abstract Summary: The bivariate, or cross branching distribution of a gas‐phase produced, film‐grade ethylene 1‐hexene copolymer with enhanced Elmendorf tear in machine direction, MD, and transverse TD, (> 400 g/mil) high dart impact has been characterized through the analysis fractions obtained by molecular weight composition. fractions, solvent‐non‐solvent fractionation technique, are each mixtures molecules at least two different compositions, one component constant relatively density...

Research Article| November 07, 2018 Shallow Fault Rupture of the Milun in Mw 6.4 Hualien Earthquake: A High‐Resolution Approach from Optical Correlation Pléiades Satellite Imagery Yu‐Ting Kuo; Kuo aInstitute Earth Sciences, Academia Sinica, 128, Section 2, Road, Nangang District, Taipei 11529, Taiwan Search for other works by this author on: GSW Google Scholar Yu Wang; Wang bDepartment Geosciences, National University, No. 1, 4, Roosevelt 106, Taiwan, wangyu79@ntu.edu.tw James Hollingsworth;...

Land subsidence is a significant problem around the world that can increase risk of flooding, damage to infrastructure, and economic loss. Hence, continual monitoring important for early detection, mechanism understanding, countermeasure implementation, deformation prediction. In this study, we used multiple-sensor observations from Continuous Global Positioning System (CGPS), small baseline subset (SBAS) algorithm, interferometric synthetic-aperture radar (InSAR), precise leveling,...

Abstract Outburst flooding after a landslide dam breach causes global fatalities and devastation. Information on the timing, magnitude, location of is crucial to hazard assessment. Despite recent efforts, successful real-time detection dams in mountain valleys breakages rare. Here, we present series seismic analysis including detection, identification formations, monitoring breaches. We show working our that occurred eastern Taiwan. The results indicate provides important information...

This letter presents a 3-D fusion method combining with the pixel offset results of synthetic aperture radar (SAR) and optical images for measuring coseismic deformation, which suffered limitations huge displacement gradient, low coherence, large temporal interval. takes advantages two different types satellites. We use hanging wall deformation 1999 Chi-Chi earthquake as an example generate sets displacements from only. compare to GPS field survey data, result shows more consistent than one...

Abstract An unusual devastating tsunami occurred on September 28, 2018 after a strike‐slip faulting earthquake in Sulawesi, Indonesia. The induced struck Palu city with ∼4‐m flow depth. We performed two analyses to investigate the source of tsunami. first conducted teleseismic inversion and obtained overall slip distribution fault. Our simulation from coseismic deformation seismically estimated produced comparable leading part observation at Pantoloan. In order reconstruct detailed fault...

Precise leveling, global positioning system (GPS), and interferometric synthetic aperture radar (InSAR) have had marked influences on the geodesy field. Many studies applied these techniques to land subsidence monitoring predictions. Land in Choushui River Fluvial Plain (CRFP) western central Taiwan is severe, primarily because of excessive groundwater pumping. Exploiting various observational this study employed a geostatistical cokriging algorithm integrate multiple types observations for...

Abstract Persistent scatterers SAR interferometry (PS-InSAR) was employed to monitor surface deformation in and around the Tainan tableland using 20 advanced synthetic aperture radar (ASAR) images from ENVISAT satellite taken during period 2005 May 19 2008 September 25. In our study, we have found that uplift rate of northern is faster than southern tableland. The slant range displacement (SRD) for area north along precise leveling array about 5 10 mm/yr with respect western edge tableland,...

Abstract. Choushui River Fluvial Plain (CRFP) is located in the western central Taiwan, where geomaterials are composed of alluvial deposits. Because CRFP area receives highly variable rainfall wet and dry seasons, groundwater becomes main resource residential water. The precise leveling monitoring from 1970s indicated that coastal areas had been threatened by serious pumping-induced land subsidence. On basis relatively accurate measurements measurements, we used cokriging technique to...

Abstract Large dip‐slip earthquakes have a major contribution to mountain building while earthquake‐induced landslides lower mountains simultaneously. The amount of the coseismic uplift and may dominate long‐term evolution. However, how contribute evolution through is less constrained in real cases. We present regional 1999 M w 7.6 Chi‐Chi earthquake by using synthetic aperture radar (SAR) images GPS. pattern consistent with field observations showing increasing movement north ~8 m toward...

A 3D surface deformation field for an earthquake can aid in understanding fault behaviors and mechanisms. However, SAR-based estimates are often limited by insufficient observations hampered various error sources. In this study, we demonstrate the derivation of a coseismic displacement from different InSAR processing algorithms. The azimuth displacements Multiple Aperture Interferometry (MAI) Pixel Offset Tracking (POT) were integrated to ensure reliable at low coherent areas. was inverted...

Abstract The Longitudinal Valley (LV) in the eastern Taiwan is located at convergent boundary between Philippine Sea Plate and Eurasian Plate. Within LV, two significant fault systems, Fault (LVF) part Central Range (CeRF) western part, have been recognized. However, understanding precise mechanisms spatial relationships of systems middle segment LV has remained a challenge. In this study, we integrate various data sources, including geodetic measurements, seismic data, field investigations,...

Abstract The Longitudinal Valley (LV) in the eastern Taiwan is located at convergent boundary between Philippine Sea Plate and Eurasian Plate. Within LV, two significant fault systems, Fault (LVF) part Central Range (CeRF) western part, have been recognized. In this study, we integrate various data sources, including geodetic data, seismic field survey, simulation results, all obtained during Guangfu earthquake. Our goal to shed light on complex structural interactions systems. We introduce...