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Remote Sensing Monitoring for Tectonic Deformation

A special issue of Remote Sensing (ISSN 2072-4292). This special issue belongs to the section "Remote Sensing in Geology, Geomorphology and Hydrology".

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 8947

Special Issue Editors


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Guest Editor
Dipartimento della Protezione Civile, Via Vitorchiano 4, 00189 Rome, Italy
Interests: geodetic strain; active tectonics; seismology; GPS observations; InSAR observations

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Guest Editor
Istituto Nazionale Di Geofisica E Vulcanologia (INGV), 00143 Rome, Italy
Interests: InSAR; earthquakes; volcanoes; subsidence; landslide; satellite image
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Special Issue Information

Dear Colleagues,


Interseismic crustal deformation produces a rather small amount of strain that is diffuse over large areas, and covers long temporal time-spans. Therefore, its accurate mapping is a crucial issue for seismic hazard assessment and provides a valuable data set to advance our understanding of the mechanics of active deformation.

In the past three decades, the increasing availability of geodetic measurements such as remote sensing techniques, interferometric synthetic aperture radar (InSAR), and Global Positioning System (GPS) observations has demonstrated a great potential to detect slow tectonic signals such as interseismic strain accumulation. Moreover, a new generation of SAR satellite missions with unprecedented temporal sampling and spatial coverage are helping Earth Observation to increase its potential, complementing existing studies in seismology, GNSS, and field measurements. Precisely in that sense, for example, the Sentinel-1A/B sensors operated by the European Space Agency in the framework of the Copernicus program aiming to conduct environmental observation, with its open data policy, provided a significant tool for measuring small-scale crustal deformation over large areas, helping research to understand the dynamics of our planet. Recently, the use of satellite geodetic observations, InSAR, and GPS data, inverted with near-source strong-motion and high-sampling-rate GPS waveforms, contributed to the detection of coseismic slip behavior, the geometry of the causative fault, and cumulative slip distribution in many seismic events, improving our knowledge of source mechanism and contributing to the definition of seismotectonics.

We invite the global scientific community to contribute to this Special Issue of Remote Sensing with scientific contributions depicting new results retrieved by using remotely sensed data from different methodologies to infer interseismic strain accumulation and coseismic deformation associated with distinct kinematic behaviors in order to clearly understand the improvements in actual active tectonic knowledge.


Dr. Roberta Giuliani
Dr. Cristiano Tolomei
Guest Editors

Manuscript Submission Information

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Keywords

  • Active Tectonics
  • Geomorphology
  • Geodesy and Surveying
  • Remote Sensing
  • Earthquakes
  • Global Positioning System

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Published Papers (2 papers)

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Research

27 pages, 20479 KiB  
Article
Neotectonics of the Western Suleiman Fold Belt, Pakistan: Evidence for Bookshelf Faulting
by Sukru O. Karaca, Ismail A. Abir, Shuhab D. Khan, Erman Ozsayın and Kamil A. Qureshi
Remote Sens. 2021, 13(18), 3593; https://doi.org/10.3390/rs13183593 - 9 Sep 2021
Cited by 10 | Viewed by 4390
Abstract
The Suleiman Fold-Thrust Belt represents an active deformational front at the western margin of the Indian plate and has been a locus of major earthquakes. This study focuses on the western part of the Suleiman Fold-Thrust Belt that comprises two parallel NW–SE oriented [...] Read more.
The Suleiman Fold-Thrust Belt represents an active deformational front at the western margin of the Indian plate and has been a locus of major earthquakes. This study focuses on the western part of the Suleiman Fold-Thrust Belt that comprises two parallel NW–SE oriented faults: Harnai Fault and Karahi Fault. These faults have known thrust components; however, there remains uncertainty about the lateral component of motion. This work presents the new observation of surface deformation using the Small Baseline Subset (SBAS), Interferometric Synthetic Aperture Radar (InSAR) technique on Sentinel-1A datasets to decompose displacement into the vertical and horizontal components employing ascending and descending track geometries. The subsurface structural geometry of this area was assessed using 2D seismic and well data. In addition, geomorphic indices were calculated to assess the relative tectonic activity of the area. InSAR results show that the Karahi Fault has a ~15 mm right-lateral movement for descending and ~10 mm/for ascending path geometries. The Harnai Fault does not show any lateral movement. Seismic data are in agreement with the InSAR results suggesting that the Harnai Fault is a blind thrust. This work indicates that the block between these two faults displays a clockwise rotation that creates the “bookshelf model”. Full article
(This article belongs to the Special Issue Remote Sensing Monitoring for Tectonic Deformation)
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17 pages, 9022 KiB  
Article
Rupture Kinematics and Coseismic Slip Model of the 2021 Mw 7.3 Maduo (China) Earthquake: Implications for the Seismic Hazard of the Kunlun Fault
by Han Chen, Chunyan Qu, Dezheng Zhao, Chao Ma and Xinjian Shan
Remote Sens. 2021, 13(16), 3327; https://doi.org/10.3390/rs13163327 - 23 Aug 2021
Cited by 42 | Viewed by 3759
Abstract
The 21 May 2021 Maduo earthquake was the largest event to occur on a secondary fault in the interior of the active Bayanhar block on the north-central Tibetan plateau in the last twenty years. A detailed kinematic study of the Maduo earthquake helps [...] Read more.
The 21 May 2021 Maduo earthquake was the largest event to occur on a secondary fault in the interior of the active Bayanhar block on the north-central Tibetan plateau in the last twenty years. A detailed kinematic study of the Maduo earthquake helps us to better understand the seismogenic environments of the secondary faults within the block, and its relationship with the block-bounding faults. In this study, firstly, SAR images are used to obtain the coseismic deformation fields. Secondly, we use a strain model-based method and steepest descent method (SDM) to resolve the three-dimensional displacement components and to invert the coseismic slip distribution constrained by coseismic displacement fields, respectively. The three-dimensional displacement fields reveal a dominant left-lateral strike-slip motion, local horizontal displacement variations and widely distributed near-fault subsidence/uplift deformation. We prefer a five-segment fault slip model, with well constrained fault geometry featuring different dip angles and striking, constrained by InSAR observations. The peak coseismic slip is estimated to be ~5 m near longitude 98.9°E at a depth of ~4–7 km. Overall, the distribution of the coseismic slip on the fault is highly correlated to the measured surface displacement offsets along the entire rupture. We observe the moderate shallow slip deficit and limited afterslip deformation following the Maduo earthquake, it may indicate the effects of off-fault deformation during the earthquake and stable interseismic creep on the fault. The occurrence of the Maduo earthquake on a subsidiary fault updates the importance and the traditional estimate of the seismic hazards for the Kunlun fault. Full article
(This article belongs to the Special Issue Remote Sensing Monitoring for Tectonic Deformation)
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