View in EDS HTML Full Text PDF Full Text

Seismic Source Complexities Revealed by InSAR and Analytical Modeling: The 2025 Mw 7.1 Dingri Earthquake.

Saved in:
Bibliographic Details
Title: Seismic Source Complexities Revealed by InSAR and Analytical Modeling: The 2025 Mw 7.1 Dingri Earthquake.
Authors: Puliero, Silvia1 (AUTHOR), Ruocco, Valerio1,2,3 (AUTHOR) valerio.ruocco@studentmail.unicas.it, Atzori, Simone1,3 (AUTHOR), Tolomei, Cristiano1 (AUTHOR), Albano, Matteo1,2 (AUTHOR), Moro, Marco1,3 (AUTHOR), Antonioli, Andrea1 (AUTHOR), Stramondo, Salvatore1 (AUTHOR), Saroli, Michele1,2,3 (AUTHOR)
Source: Remote Sensing. Jun2026, Vol. 18 Issue 11, p1751. 24p.
Subjects: Radar interferometry, Earthquakes, Geologic faults, Fault zones, Surface fault ruptures, Structural geology, Stress concentration
Geographic Terms: Tibet (China)
Abstract: Highlights: Using InSAR data, this study reveals that the Mw 7.1 Dingri earthquake ruptured four distinct fault segments, including a listric primary fault and an antithetic fault. The activation of multiple segments highlights the complexity of rupture processes and provides new insights into fault interactions and seismic hazard in extensional tectonic regions. What are the main findings? The Mw 7.1 Dingri earthquake involved a complex rupture activating four distinct fault segments, including a primary north–south listric fault and three secondary fault segments, as revealed by joint inversion of multi-sensor InSAR (Sentinel-1, ALOS-2) and GNSS observations. Coseismic slip distribution revealed predominantly normal faulting with a minor left-lateral component, while ΔCFF stress analysis supports the simultaneous activation of secondary segments during the mainshock. What are the implications of the main findings? The study demonstrates the ability of InSAR to resolve complex, multi-segment earthquake ruptures, including the antithetic fault and the other two secondary fault segments. Understanding synchronous multi-segment activation improves seismic hazard assessment in extensional regions and highlights the importance of integrating geodetic observations, photogeological interpretation, and stress transfer analyses for detailed rupture characterization. This study investigates the Mw 7.1 earthquake that struck the Southern Tibetan Plateau (Xizang) on 7 January 2025, using joint Interferometric Synthetic Aperture Radar (InSAR) observations and inverse modeling to characterize the fault geometry and slip distribution. Coseismic interferograms derived from Sentinel-1 and ALOS-2 data reveal complex surface deformation patterns, indicating rupture along four distinct fault segments. This configuration provides a more detailed fault segmentation than proposed in previous studies, featuring predominantly normal faulting on a north–south-trending structure consistent with regional extensional tectonics. Integrated analysis of coseismic deformation, source modeling, and Coulomb Failure Function (ΔCFF) stress changes suggests that the three secondary fault segments were potentially activated synchronously with the mainshock, in addition to the principal rupture. The results underscore the complexity of the seismic source and document the activation of an antithetic fault segment, for which the InSAR observations provide compelling quantitative evidence. [ABSTRACT FROM AUTHOR]
Copyright of Remote Sensing is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Full text is not displayed to guests.
FullText Links:
  – Type: pdflink
Text:
  Availability: 1
Header DbId: egs
DbLabel: Engineering Source
An: 194586972
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Seismic Source Complexities Revealed by InSAR and Analytical Modeling: The 2025 Mw 7.1 Dingri Earthquake.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Puliero%2C+Silvia%22">Puliero, Silvia</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ruocco%2C+Valerio%22">Ruocco, Valerio</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> valerio.ruocco@studentmail.unicas.it</i><br /><searchLink fieldCode="AR" term="%22Atzori%2C+Simone%22">Atzori, Simone</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tolomei%2C+Cristiano%22">Tolomei, Cristiano</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Albano%2C+Matteo%22">Albano, Matteo</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Moro%2C+Marco%22">Moro, Marco</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Antonioli%2C+Andrea%22">Antonioli, Andrea</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Stramondo%2C+Salvatore%22">Stramondo, Salvatore</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Saroli%2C+Michele%22">Saroli, Michele</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Remote+Sensing%22">Remote Sensing</searchLink>. Jun2026, Vol. 18 Issue 11, p1751. 24p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Radar+interferometry%22">Radar interferometry</searchLink><br /><searchLink fieldCode="DE" term="%22Earthquakes%22">Earthquakes</searchLink><br /><searchLink fieldCode="DE" term="%22Geologic+faults%22">Geologic faults</searchLink><br /><searchLink fieldCode="DE" term="%22Fault+zones%22">Fault zones</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+fault+ruptures%22">Surface fault ruptures</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+geology%22">Structural geology</searchLink><br /><searchLink fieldCode="DE" term="%22Stress+concentration%22">Stress concentration</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Tibet+%28China%29%22">Tibet (China)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Highlights: Using InSAR data, this study reveals that the Mw 7.1 Dingri earthquake ruptured four distinct fault segments, including a listric primary fault and an antithetic fault. The activation of multiple segments highlights the complexity of rupture processes and provides new insights into fault interactions and seismic hazard in extensional tectonic regions. What are the main findings? The Mw 7.1 Dingri earthquake involved a complex rupture activating four distinct fault segments, including a primary north–south listric fault and three secondary fault segments, as revealed by joint inversion of multi-sensor InSAR (Sentinel-1, ALOS-2) and GNSS observations. Coseismic slip distribution revealed predominantly normal faulting with a minor left-lateral component, while ΔCFF stress analysis supports the simultaneous activation of secondary segments during the mainshock. What are the implications of the main findings? The study demonstrates the ability of InSAR to resolve complex, multi-segment earthquake ruptures, including the antithetic fault and the other two secondary fault segments. Understanding synchronous multi-segment activation improves seismic hazard assessment in extensional regions and highlights the importance of integrating geodetic observations, photogeological interpretation, and stress transfer analyses for detailed rupture characterization. This study investigates the Mw 7.1 earthquake that struck the Southern Tibetan Plateau (Xizang) on 7 January 2025, using joint Interferometric Synthetic Aperture Radar (InSAR) observations and inverse modeling to characterize the fault geometry and slip distribution. Coseismic interferograms derived from Sentinel-1 and ALOS-2 data reveal complex surface deformation patterns, indicating rupture along four distinct fault segments. This configuration provides a more detailed fault segmentation than proposed in previous studies, featuring predominantly normal faulting on a north–south-trending structure consistent with regional extensional tectonics. Integrated analysis of coseismic deformation, source modeling, and Coulomb Failure Function (ΔCFF) stress changes suggests that the three secondary fault segments were potentially activated synchronously with the mainshock, in addition to the principal rupture. The results underscore the complexity of the seismic source and document the activation of an antithetic fault segment, for which the InSAR observations provide compelling quantitative evidence. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Remote Sensing is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=194586972
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.3390/rs18111751
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 24
        StartPage: 1751
    Subjects:
      – SubjectFull: Radar interferometry
        Type: general
      – SubjectFull: Earthquakes
        Type: general
      – SubjectFull: Geologic faults
        Type: general
      – SubjectFull: Fault zones
        Type: general
      – SubjectFull: Surface fault ruptures
        Type: general
      – SubjectFull: Structural geology
        Type: general
      – SubjectFull: Stress concentration
        Type: general
      – SubjectFull: Tibet (China)
        Type: general
    Titles:
      – TitleFull: Seismic Source Complexities Revealed by InSAR and Analytical Modeling: The 2025 Mw 7.1 Dingri Earthquake.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Puliero, Silvia
      – PersonEntity:
          Name:
            NameFull: Ruocco, Valerio
      – PersonEntity:
          Name:
            NameFull: Atzori, Simone
      – PersonEntity:
          Name:
            NameFull: Tolomei, Cristiano
      – PersonEntity:
          Name:
            NameFull: Albano, Matteo
      – PersonEntity:
          Name:
            NameFull: Moro, Marco
      – PersonEntity:
          Name:
            NameFull: Antonioli, Andrea
      – PersonEntity:
          Name:
            NameFull: Stramondo, Salvatore
      – PersonEntity:
          Name:
            NameFull: Saroli, Michele
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 20724292
          Numbering:
            – Type: volume
              Value: 18
            – Type: issue
              Value: 11
          Titles:
            – TitleFull: Remote Sensing
              Type: main
ResultId 1