A growing structure near the deformation front in SW Taiwan as deduced from SAR interferometry and geodetic observation

Huang, M. H.; Hu, Jyr Ching; Hsieh, Chia-Sheng; Ching, Kuo En; Rau, R.; Pathier, Erwan; Fruneau, Bénédicte; Deffontaines, Benoı̂t

doi:10.1029/2005gl025613

Cited by 24 publications

(25 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Tainan Tableland located west of the HCLF (Fig. 3) demonstrate a high uplift rate of ~10 mm yr -1 responsible for active fault-related folding process (Fruneau et al 2001;Huang et al 2006Huang et al , 2009. In addition, the area bounded by the ZCF, SGSF, and CSF also show a significant tectonic uplift, which is also demonstrated by SAR interferometry and interpreted as active folding resulted from ramp duplex or high mobility of mud-core anticline ).…”

Section: The High Precision Velocity Field From 2007 -2015mentioning

confidence: 78%

“…Tsai (2013) analyzed the interseismic velocity profile and indicated a significant velocity discontinuity across the Hochiali fault, it may suggest the fault could be a seismogenic fault. 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.…”

Section: Tectonic Setting Background Seismicity and Active Structurmentioning

confidence: 99%

See 1 more Smart Citation

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

Section: The High Precision Velocity Field From 2007 -2015mentioning

confidence: 78%

Section: Tectonic Setting Background Seismicity and Active Structurmentioning

confidence: 99%

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

show abstract

“…1), a normal fault associated with the growth of diapiric fold has first been proposed using the seismic gravity, drilling well and shallow seismic survey data (Hsieh 1972;Kuo et al 1998). In addition, a reverse fault has also been proposed using the geophotograph technique (Sun 1964) and the repeated geodetic survey and D-InSAR results (Fruneau et al 2001;Huang et al 2006Huang et al , 2009Mouthereau et al 2002). For the HKSF (number 6 in Fig.…”

Section: Geological Backgroundmentioning

confidence: 99%

Tectonic effect for establishing a semi-dynamic datum in Southwest Taiwan

Ching

Chen

2015

Earth Planet Sp

Self Cite

View full text Add to dashboard Cite

To accommodate the effects of crustal deformation in the current national static geodetic datum (Taiwan Geodetic Datum 1997 (TWD97)) in SW Taiwan, 221 campaign-mode global positioning system (GPS) stations from 2002 to 2010 were used in this study to generate a surface horizontal velocity model for establishing a semi-dynamic datum in SW Taiwan. An interpolation method, Kriging, and a tectonic block model, DEFNODE, were used to construct the surface horizontal velocity model. Forty-four continuous GPS stations were used to examine the performance of the semi-dynamic datum through exterior validation. The average values of the residual errors obtained using the Kriging method for the north and east components are ±1.9 and ±2.2 mm/year, respectively, whereas those obtained using the block model are ±2.0 and ±2.9 mm/year, respectively. The distribution of residuals greater than 5 mm/year for both models generally corresponds to a high strain rate area derived using the horizontal velocity field. In addition, these residuals may result from deep-seated landslide and active folding or mud diapir in a mudstone area. Similar exterior checking results obtained using the Kriging interpolation method and block model for SW Taiwan indicate a high station density and a relatively satisfactory station spatial coverage. However, the block model is superior to the Kriging method due to the consideration of characteristics of the geological structure in the block model. In addition, result from traditional coordinate transformation was used to compare with the semi-dynamic datum. The results indicate that a semi-dynamic datum is a feasible solution for maintaining the accuracy of TWD97 at an appropriate level over time in Taiwan.

show abstract

“…In addition to mandatory corrections of various effects related to orbital and climatic characteristics, the resulting DInSAR interferograms may be affected by poor image coherence caused by abrupt terrain and dense vegetation, a dire concern in Taiwan. However, several successful studies have already validated this method and mapped the Earth's surface deformation in Taiwan, including the studies regarding the uplift of the Tainan tableland (Fruneau et al 2001;Huang et al 2006) and the co-seismic deformation of the footwall block of the Chelungpu Fault during the 1999 Chi-Chi earthquake (Pathier et al 2003;Chang et al 2004b;Hsieh and Shih 2006).…”

Section: Introductionmentioning

confidence: 97%

Using differential SAR interferometry to map land subsidence: a case study in the Pingtung Plain of SW Taiwan

Hsieh

Shih

et al. 2011

Nat Hazards

Self Cite

View full text Add to dashboard Cite

Synthetic aperture radar (SAR) interferometry (InSAR) is a geodetic tool widely applied in the studies of earth-surface deformation. This technique has the benefits of high spatial resolution and centimetre-scale accuracy. Differential SAR interferometry (DInSAR) is used to measure ground deformation with repeat-pass SAR images. This study applied DInSAR and persistent scatterers InSAR (PSInSAR) for detecting land subsidence in the Pingtung Plain, southern Taiwan, between 1995 and 2000. In recent years, serious land subsidence occurred along coastal regions of Taiwan as a consequence of over-pumping of underground water. Results of this study revealed that the critical subsidence region is located on the coast near the estuary of Linpien River. It is also found that subsidence was significantly higher during the dry season than the wet season. The maximum annual subsidence rate of the dry season is up to -11.51 cm/year in critical subsidence region and the vertical land movement rate is much slower during the wet season. The average subsidence rates in wet and dry seasons are -0.31 and -3.37 cm/year, respectively. As a result, the subsidence rate in dry seasons is about 3 cm larger than in wet seasons.

show abstract

A growing structure near the deformation front in SW Taiwan as deduced from SAR interferometry and geodetic observation

Cited by 24 publications

References 13 publications

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

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

Tectonic effect for establishing a semi-dynamic datum in Southwest Taiwan

Using differential SAR interferometry to map land subsidence: a case study in the Pingtung Plain of SW Taiwan

Contact Info

Product

Resources

About