Sentinel-1 InSAR observations of co- and post-seismic deformation mechanisms of the 2016 Mw 5.9 Menyuan Earthquake, Northwestern China

Qu, Wei; Liu, Bohan; Zhang, Qin; Gao, Yuan; Chen, Hailu; Wang, Qingliang; Hao, Ming

doi:10.1016/j.asr.2021.03.016

Cited by 22 publications

(11 citation statements)

References 36 publications

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“…6, which shows Menyuan M6.4 earthquake took place during the BT's high-value stage. In addition, the co-seismic deformation field from INSAR found the vertical deformation is uplifting, indicating there was stress extrusion before the Menyuan M6.4 earthquake [45].…”

Section: A Relationship Between Spatial Bt Anomalies and Tectonic Str...mentioning

confidence: 99%

Analytical Study of the Changes in Brightness Temperature Based on the Tectonic Field Associated With Three Earthquakes in the Eastern Tibetan Plateau

Yang

Tie-bao

et al. 2023

IEEE Trans. Geosci. Remote Sensing

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The thermal infrared brightness temperature (BT) of the eastern Tibetan Plateau (TP) was retrieved from the Moderate Resolution Imaging Spectroradiometer (MODIS) level-1B data. The multiyear averaged BT background field was subtracted from the punctual BT data to yield monthly BT spatial anomaly, and calculated time series of BT for the secondary blocks. Then, the spatial and temporal changes in the BT of the study area before the Menyuan M6.4, Zaduo M6.2, and Jiuzhaigou M7.0 earthquakes were investigated and analyzed based on the tectonic setting. The results show the following. The spatial BT radiation enhancement frequency rose remarkably before strong earthquakes; each of the three earthquakes was preceded by marked spatiotemporal continuous BT anomalies. The tectonic setting significantly influences the BT anomaly feature. The spatial BT anomaly was not notable in the Qaidam and Qilian block before the Menyuan earthquake; the spatial BT anomaly mainly appeared in the Qiangtang and Bayan Har blocks before the Zaduo and Jiuzhaigou earthquakes. The Qiangtang and Bayan Har block's BT time series curves have similar features. The Qaidam and Qilian block's BT time series curves have analogous shapes. The three earthquakes may be regarded as one seismic event induced by a stage of tectonic stress enhancement rather than three independent occasions. The spatial BT anomalous behavior before earthquakes is, to a great extent, like the result of the rock stress loading experiment; the rock compression and the lithosphere-atmosphere-ionosphere coupling (LAIC) may be the main reasons for the intensification of the BT radiation.

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Section: A Relationship Between Spatial Bt Anomalies and Tectonic Str...mentioning

confidence: 99%

Analytical Study of the Changes in Brightness Temperature Based on the Tectonic Field Associated With Three Earthquakes in the Eastern Tibetan Plateau

Yang

Tie-bao

et al. 2023

IEEE Trans. Geosci. Remote Sensing

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“…Therefore, although the selected GCPs were valid and with them, the landslide precursor near June 2017 has been revealed in Figs. 9 and 10, one should use spatially dispersed GCPs in a surface deformation study. As shown here, one will be more confident about the InSAR outcomes since the chance to obtain possible biased products using GCPs from one single GCP cluster decreases.…”

Section: (A)]mentioning

confidence: 99%

“…With the interferometric SAR (InSAR) technique, one estimates the gradual ground surface deformation utilizing the phase difference information from repeat-orbit SAR observations [1]- [4]. The estimation can capture precursory movements of natural disasters [5]- [9] and surface subsidence [10]- [15]. When the side-looking SAR images rugged terrain, geometric distortion [16], i.e., foreshortening, layover, or shadow, can occur along the line-of-sight (LOS) direction.…”

Section: Introductionmentioning

confidence: 99%

Determining Suitable Spaceborne SAR Observations and Ground Control Points for Surface Deformation Study in Rugged Terrain With InSAR Technique

Yan¹,

Wang²

2021

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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We aim to address two primary issues using the multi-temporal (MT) spaceborne SAR observations and InSAR technique to monitor slope stability in rugged terrains. One is how to maximize the observation and application effectiveness based on the geometric distortion in an area of interest (AOI) for determining appropriate ascending-and descending-orbit SAR observations. The other is how to optimize the selection of ground control points (GCPs) to correct orbital phase errors and reference in deriving valid ground surface displacements in the SBAS InSAR analysis. Four criteria were proposed to identify valid GCPs efficiently and effectively. The 2017 Xinmo landslide event, China, was showcased. The tear-away zone was 100% and ~50% distorted when imaged by ascending-and descending-orbit Sentinel-1A/B SAR sensors. The descending SAR datasets were preferred. Then, we identified four spatially dispersed GCP clusters with the selection criteria using the SBAS InSAR technique and 45 descending-orbit MT SAR datasets. One GCP per cluster was chosen. With the four GCPs and SBAS analysis, we successfully detected the stable status in the landslide-free area and the pre-landslide acceleration movement within the tearaway zone. Valid InSAR-derived results have been obtained. In turn, the GCP selection criteria have been validated, and the two issues resolved. Index Terms-Amplitude dispersion index (ADI); geometric distortion; ground control point (GCP); multi-temporal (MT) observations; phase derivative variance (PDV); SBAS InSAR.

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“…Non-contact measurements can also be carried out by drones, LiDAR (Light Detection and Ranging, LiDAR) or InSAR (Interferometric Synthetic Aperture Radar technology (InSAR) [ 6 , 7 ]. Result from these observative advantages of SAR, such as large area, traceability, non–contact, and high accuracy, it has gained significant attention in recent years and has produced fruitful research results in several fields [ 8 ], e.g., earthquake and landslide monitoring [ [9] , [10] , [11] , [12] ], subway observation [ 13 , 14 ], mine and urban ground deformation detection [ 15 , 16 ], etc. However, on account of the issues including spatiotemporal decoherence and atmospheric delay, the D-InSAR approach in practice has significant constraints in terms of data processing [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal evolution of deformation and LSTM prediction model over the slope of the deep excavation section at the head of the South-North Water Transfer Middle Route Canal

Ding,

Li,

Lei

et al. 2024

Heliyon

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Sentinel-1 InSAR observations of co- and post-seismic deformation mechanisms of the 2016 Mw 5.9 Menyuan Earthquake, Northwestern China

Cited by 22 publications

References 36 publications

Analytical Study of the Changes in Brightness Temperature Based on the Tectonic Field Associated With Three Earthquakes in the Eastern Tibetan Plateau

Analytical Study of the Changes in Brightness Temperature Based on the Tectonic Field Associated With Three Earthquakes in the Eastern Tibetan Plateau

Determining Suitable Spaceborne SAR Observations and Ground Control Points for Surface Deformation Study in Rugged Terrain With InSAR Technique

Spatiotemporal evolution of deformation and LSTM prediction model over the slope of the deep excavation section at the head of the South-North Water Transfer Middle Route Canal

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