Transient active deformation in Tainan tableland using persistent scatterers SAR interferometry

Wu, Yu Yia; Hu, Jyr Ching; Lin, Geng Pei; Chang, Chung Pai; Tung, Hsin; Lu, Chih Heng

doi:10.2113/gssgfbull.184.4-5.441

Cited by 7 publications

(9 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The active present‐day growth of the Tainan anticline is probably the best‐monitored fold growth on Earth. Leveling, GPS, and InSAR measurements covering different time periods since 1996 (Ching, Hsieh, et al, ; Huang et al, , Huang, Bürgmann, et al, ; Wu et al, ; CGS, ) converge to an average present‐day uplift rate of 9–12 mm/a of the tableland relative to the Coastal Plain. Horizontal velocities based on continuous and campaign GPS measurements between 2002 and 2014 (CGS, ) progressively decrease from the toe of the foothills, in the east, to the coastline, in the west (Figure ), clearly imaging the consumption of westward shortening.…”

Section: Discussionmentioning

confidence: 99%

“…Numerous geodetic studies proposed the occurrence of aseismic slip on the Houchiali fault and Tainan detachment, as steady creep during periods of a few years or as transient events associated with or following local and regional earthquakes (Butcher and Huang, ; Ching, Rau, et al, ; Fruneau et al, ; Huang et al, , , Huang, Bürgmann, et al, , Huang, Hsin, et al, ; Wu et al, ). Transient events, in particular, were observed not only on the tableland and across the Houchiali fault but also across some of the hinterland back thrusts (Figure c).…”

Section: Discussionmentioning

confidence: 99%

“…The Holocene uplift rate was constrained to 5 mm/a based on stratigraphy and 14 C dating from boreholes (Chen and Liu, ). More recently, several geodetic surveys based on GPS, precise leveling, and Interferometric Synthetic Aperture Radar (InSAR) revealed rapid and transient deformation of the tableland, with uplift rates up to ~10–12 mm/a (Ching, Hsieh et al, ; Fruneau et al, ; Huang et al, , ; Huang, Bürgmann, et al, ; Wu et al, ; CGS, ). Hence, the Tainan Tableland, which hosts ~1 million inhabitants, became an important focus for seismic hazard assessment.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Structure and Deformation History of the Rapidly Growing Tainan Anticline at the Deformation Front of the Taiwan Mountain Belt

et al. 2019

View full text Add to dashboard Cite

This study aims at further documenting the mechanisms of shortening at the front of fold‐and‐thrust belts. We focus on an actively growing anticline located at the deformation front of the Taiwan fold‐and‐thrust belt. Based on a multidisciplinary approach combining mainly subsurface data and geodetic techniques, we show that the Tainan anticline is a pure‐shear fault‐bend fold growing above a 38–45° west dipping back thrust, the Houchiali fault, rooted on a 3.8‐km‐deep detachment. The cumulative shortening is estimated at 2–3 km since 310 ± 50 ka, including ~30–50% of horizontal compaction shortening. The significance of the fold is little in terms of total shortening at the scale of the mountain piedmont, yet the Holocene shortening rate of 10.3 ± 1.0 mm/a accounts for 25% of the present‐day shortening rate across the piedmont. Earthquake scaling relationships applied to the Houchiali fault predict Mw~6 earthquakes that would occur a lot more frequently than indicated from historical earthquake catalogs. Hence, the aseismic slip behavior observed from geodetic measurements since two decades is a representative behavior of the fault at least at the scale of a few centuries. Our results bear out the dominance of pure‐shear folding at the front of fold‐and‐thrust belts and support horizontal compaction as a significant shortening mechanism. In contrast, the back thrust wedge structure and the aseismic slip are peculiar characteristics that likely arise from the combination of low friction and high‐pore pressure related to the thick mudstone formation hosting the wedge and of high syntectonic sedimentation rates.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structure and Deformation History of the Rapidly Growing Tainan Anticline at the Deformation Front of the Taiwan Mountain Belt

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Based on SAR interferometry (Fruneau et al 2001;Huang et al 2006Huang et al , 2009 suggested that the uplift of Tainan tableland is associated of active folding controlled by west-vergent blind Tainan fault and east-vergent Hochiali fault. In addition, a variation of LOS rate across the Hochiali fault was revealed by PS-InSAR (Wu et al 2013) deformation. It implies that the seasonality and hydro-geological condition also play a crucial role for the transient deformation (Huang et al 2016a).…”

Section: Tectonic Setting Background Seismicity and Active Structurmentioning

confidence: 98%

Pre-seismic strain anomalies and coseismic deformation of Meinong earthquake from continuous GPS

Tsai¹,

Shin²,

Kuo³

2017

Terr. Atmos. Ocean. Sci.

View full text Add to dashboard Cite

High strain accumulation across the fold-and-thrust belt in SW Taiwan are revealed by the Continuous GPS (cGPS) from 2007 -2015. This high strain is generally accommodated by the major active structures in fold-and-thrust belt of western Foothills. In addition, the plastic deformation of mudstone in the Gutingkeng formation might play a crucial role for aseismic creeping. Furthermore, the distributed rightlateral shear zone, fault-related folding and aseismic creeping are also dominated from Lungchuan fault and Chishan fault to the north of Kaohsiung area. Based on distribution of coseismic uplift across the Lungchuan fault to the Tainan tableland, a clear evidence of multiple fault slips was triggered by the 2016 M w 6.4 Meinong earthquake at ~15 km. The surface coseismic deformation is mainly controlled by a fault-related folding structures connected to the shallow décollement around 5 -10 km depth, in which the moderate earthquakes locate in mid-crust could trigger slip along the weak décollement. The pre-seismic baseline variation of cGPS is observed in 8 baselines near the epicenter of the Meinong earthquake. The rate-slow-down anomalies of these baseline variation could be considered as a possible precursor of the Meinong earthquake.

show abstract

“…Over the years, precise leveling, global positioning system (GPS) and interferometric synthetic aperture radar (InSAR) have proven to be powerful techniques in the field of geodesy. Many studies have applied these techniques for land subsidence monitoring and prediction (Reilinger et al 1977;Dixon 199l;Yu and Chen 1994;Galloway et al 1998;Massonnet and Feigl 1998;Ferretti et al 2001;Sato et al 2003;Chang et al 2004;Hooper et al 2004Hooper et al , 2007; Galloway and Burbey 2011; Yen et al 2011;Wu et al 2013). …”

Section: Introductionmentioning

confidence: 99%

Geostatistical Data Fusion of Multiple Type Observations to Improve Land Subsidence Monitoring Resolution in the Choushui River Fluvial Plain, Taiwan

Chang

et al. 2016

Terr. Atmos. Ocean. Sci.

Self Cite

View full text Add to dashboard Cite

Precise leveling, global positioning system (GPS), and interferometric synthetic aperture radar (InSAR) have had marked influences on the geodesy field. Many studies have applied these techniques to land subsidence monitoring and predictions. Land subsidence in the Choushui River Fluvial Plain (CRFP) in western central Taiwan is severe, primarily because of excessive groundwater pumping. Exploiting various observational techniques this study employed a geostatistical cokriging algorithm to integrate multiple types of observations for mapping land subsidence in the CRFP between 1993 and 2008 to effectively reduce the regional effects and interpolation biases in InSAR observations. Precise leveling data and persistent scatterer InSAR results were first assessed through variogram analysis, the results of which revealed similar directional variograms and no nugget effect for the experimental variograms. All observed sill values decreased with increasing temporal intervals and the ranges of the same type of observations tended to be stable for time intervals of different lengths. The accuracy of a cokriged land subsidence map was verified using continuous GPS data at the same cell locations and was significantly improved compared to when the precise leveling data were used. The cokriging interpolations of land subsidence in the CRFP indicated that the severe subsidence areas had moved from the coastal area to the central CRFP. An obvious critical subsidence migration point for the southern CRFP occurred in 1998. Overall subsidence rate trends increased in the early periods (1993 -1998 and 1998 -2003) and decreased in the most recent period (2005 -2008).

show abstract

Transient active deformation in Tainan tableland using persistent scatterers SAR interferometry

Cited by 7 publications

References 39 publications

Structure and Deformation History of the Rapidly Growing Tainan Anticline at the Deformation Front of the Taiwan Mountain Belt

Structure and Deformation History of the Rapidly Growing Tainan Anticline at the Deformation Front of the Taiwan Mountain Belt

Pre-seismic strain anomalies and coseismic deformation of Meinong earthquake from continuous GPS

Geostatistical Data Fusion of Multiple Type Observations to Improve Land Subsidence Monitoring Resolution in the Choushui River Fluvial Plain, Taiwan

Contact Info

Product

Resources

About