High-resolution rate maps from the Tajik basin and the Pamir

Cite as:

Metzger, Sabrina; Lazecky, Milan; Maghsoudi, Yasser (2021): High-resolution rate maps from the Tajik basin and the Pamir. GFZ Data Services. https://doi.org/10.5880/GFZ.4.1.2021.005

Status

I N R E V I E W : Metzger, Sabrina; Lazecky, Milan; Maghsoudi, Yasser (2021): High-resolution rate maps from the Tajik basin and the Pamir. GFZ Data Services. https://doi.org/10.5880/GFZ.4.1.2021.005

Abstract

Interferometric East and Up rate maps based on time-series analysis of ~5 years of Sentinel-1 radar data provide an unprecedented spatial (~400 m) resolution of the recend surface deformation of the Tajik fold-and-thrust-belt and the greater Pamir area. Among other the data exhibit E-W shortening in the fold-thrust-belt, slip activity of the Babadag thrust fault and the Ilyak strike-slip fault, westward Pamir escape tectonics, halokinesis and near-surface, water-driven effects. Observations and methodology are discussed at length in Metzger et al., 2021 (under Review).
The zip-folder contains 1) the framewise rates and uncertainties and corresponding line-of-sight (LOS) information, all labelled by frame numbers, 2) the interpolated north rates based on Eurasian-fixed GNSS and 3) the concatenated and decomposed east and up rates in a Eurasian-fixed reference frame. A GMT script (Wessel & Smith, 2013, v6.0.0) and corresponding Figures serve as an example on how to plot the data.

Methods

Pre-processed interferograms of 13 Sentinel-1 radar frames serve as the input data for a framewise small-baseline time-series analysis using the LiCSAR/LiCSBAS data processing chain (Lazecky et al., 2020, Morishita et al., 2020). The resulting rate maps in line-of-sight were first tied to the Eurasian-fixed reference frame spanned by available regional GNSS data. If data from two view directions were available, they were decomposed in east and up by fixing the north rates to the interpolated GNSS north rates (Ou, 2020).

Authors

Metzger, Sabrina;GFZ German Research Centre for Geosciences, Potsdam, Germany
Lazecky, Milan;COMET, School of Earth and Environment, University of Leeds, United Kingdom
Maghsoudi, Yasser;COMET, School of Earth and Environment, University of Leeds, United Kingdom