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Seismogenic Analysis of the 2023 Mw6.9 Murghob Earthquake, Tajikistan, based on Multi-Track InSAR and Modelling.

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Title: Seismogenic Analysis of the 2023 Mw6.9 Murghob Earthquake, Tajikistan, based on Multi-Track InSAR and Modelling.
Alternate Title: Seizmogena analiza potresa magnitude 6,9 u Murghobu 2023. godine, Tadžikistan, temeljena na Multi-Track InSAR tehnici i modeliranju.
Authors: Jaladara, Rana1, Setiawan, Naufal1 naufal.setiawan@upnyk.ac.id, Sumanjaya, Erlan2
Source: Rudarsko-Geološko-Naftni Zbornik. 2026, Vol. 41 Issue 3, p69-80. 12p.
Subject Terms: *Strike-slip faults (Geology), *Radar interferometry, *Surface fault ruptures, *Earthquakes, *Structural geology, *Seismology measurements
Abstract (English): This study investigates the 2023 Murghob Earthquake in Tajikistan (Mw 6.9) using modelling and multi-track InSAR techniques to analyze the surface deformation and fault dynamics. The modelling approach using Pyrocko produced observation, model, and residual images, each revealing aspects of the fault geometry and rupture characteristics. Our study identified a dominant right-lateral strike-slip event, with a calculated fault strike of 128°, dip of 67°, and rake of 177°, differing slightly from previous studies. Furthermore, the modelling also suggested mixed-slip faulting, incorporating normal faulting components along the Sarez-Karakul Fault system and the Sarez-Murghab Thrust system. These findings indicate a more complex rupture process than previously emphasised in other models. Multi-track InSAR analysis supported these findings by providing high-resolution measurements of horizontal (dH) and vertical (dV) displacements. The horizontal displacements revealed significant strike-slip movements (-0.53 to 0.12 meters) along the Aksu Murghab Fault system. Meanwhile, the vertical displacements indicated substantial uplift (-0.13 and 0.32 meters), likely due to normal and thrust faulting interactions. The results highlight the complexity of the region's tectonic setting, which is influenced by multiple fault systems, including the Sarez-Karakul and Aksu Murghab faults. The study underscores the importance of integrating various geophysical methods to understand earthquake mechanisms better and improve seismic hazard assessments in tectonically active regions like Tajikistan. [ABSTRACT FROM AUTHOR]
Abstract (Bosnian): Ova studija istražuje potres u Murghobu u Tadžikistanu 2023. godine (Mw 6,9) korištenjem modeliranja i Multi-Track InSAR tehnike s ciljem definiranja deformacija površine i dinamike rasjeda. Pyrocko pristup modeliranju rezultirao je stvaranjem opažačkih, modeliranih i rezidualnih slika, od kojih svaka otkriva određene aspekte geometrije rasjeda i karakteristika loma. Naša studija identificirala je dominantni događaj desnoga lateralnog pomaka po pružanju, s izračunanim pravcem pružanja rasjeda od 128-308°, smjerom nagiba 218°, kutom nagiba od 67° i smjerom pomaka krovine prema azimutu 177°. Nadalje, modeliranje je također uputilo na postojanje dijagonalnoga pomaka po rasjedu, uključujući komponente normalnoga rasjedanja duž rasjednoga sustava Sarez-Karakul i navlačnoga sustava Sarez-Murghab. Ta saznanja upućuju na složeniji proces rasjedanja nego što je prethodno naglašavano u drugim modelima. Multi-Track InSAR analiza podržala je ove rezultate mjerenjima visoke rezolucije horizontalnih (dH) i vertikalnih (dV) pomaka. Horizontalni pomaci otkrili su znatne pomake po pružanju (-0,53 do 0,12 metara) duž rasjednoga sustava Aksu Murghab. U međuvremenu vertikalni pomaci uputili su na znatno izdizanje (-0,13 i 0,32 metra), vjerojatno zbog interakcije između normalnih rasjeda i navlaka. Rezultati ističu postojanje složenoga tektonskog okruženja u regiji, na koje utječu višestruki rasjedni sustavi, uključujući rasjede Sarez-Karakul i Aksu Murghab. Rezultati istraživanja naglašavaju važnost integriranja različitih geofizičkih metoda kako bi se bolje razumjeli mehanizmi potresa i poboljšale procjene seizmičke opasnosti u tektonski aktivnim regijama poput Tadžikistana. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
Description
Abstract:This study investigates the 2023 Murghob Earthquake in Tajikistan (Mw 6.9) using modelling and multi-track InSAR techniques to analyze the surface deformation and fault dynamics. The modelling approach using Pyrocko produced observation, model, and residual images, each revealing aspects of the fault geometry and rupture characteristics. Our study identified a dominant right-lateral strike-slip event, with a calculated fault strike of 128°, dip of 67°, and rake of 177°, differing slightly from previous studies. Furthermore, the modelling also suggested mixed-slip faulting, incorporating normal faulting components along the Sarez-Karakul Fault system and the Sarez-Murghab Thrust system. These findings indicate a more complex rupture process than previously emphasised in other models. Multi-track InSAR analysis supported these findings by providing high-resolution measurements of horizontal (dH) and vertical (dV) displacements. The horizontal displacements revealed significant strike-slip movements (-0.53 to 0.12 meters) along the Aksu Murghab Fault system. Meanwhile, the vertical displacements indicated substantial uplift (-0.13 and 0.32 meters), likely due to normal and thrust faulting interactions. The results highlight the complexity of the region's tectonic setting, which is influenced by multiple fault systems, including the Sarez-Karakul and Aksu Murghab faults. The study underscores the importance of integrating various geophysical methods to understand earthquake mechanisms better and improve seismic hazard assessments in tectonically active regions like Tajikistan. [ABSTRACT FROM AUTHOR]
ISSN:03534529
DOI:10.17794/rgn.2026.3.5