PSInSAR and GNSS derived deformation study in the west part of Narmada Son Lineament (NSL), western India

Abstract

The Narmada Son Lineament located in the middle part of the Indian plate is to be considered seismically active part and already experienced six moderate earthquakes in the last century. The geological studies summarize that the reactivation of existing faults of the paleo-rift are the main source of the tectonic deformation in this part. In the present study the PSInSAR technique with Sentinel 1A dataset, 2016–2019, is being applied for the measurement of deformation pattern of NSL. The derived results were collectively analyzed with the time-series dataset (2009–2019) of a GNSS site located in the study area. The results reveal association of very low amount of deformation along the Son Narmada Fault (SNF). The area towards south of the SNF portrays approximately 2.0 mm of annual Line of Sight (LoS) displacement, which we believe is significant for this region. The estimated deformation lies mainly along the Tapti North Fault (TNF) and Barwani Sukta Fault (BSF) and represented by the existence of a number of transverse faults in the area. The presence of seismic activity in this part justifies the area of maximum deformation accumulation.

Keywords

• PSInSAR
• GNSS
• DEformation
• NSL
• Indian plate