ALBERT

Description: We have installed 20 new Global Positioning System (GPS) markers in the West Pamir and the Tajik Depression and measured 25 markers once a year between 2013 and 2016 in survey mode. The stations are positioned along two dense NW-SE oriented profiles with an average spacing of 5-10 km. The profiles cross the Darvaz and the Vakhsh/Ilyak fault and thus monitor the recent slip of these two profiles, which are expected to accommodate the gravity-driven westward extrusion of the West Pamir into the Tajik Depression. Some of the stations include millimeter to centimeter offsets potentially caused by the 2015 Mw7.2 Sarez, Pamir, earthquake.

Description: We have installed 19 new Global Navigation Satellite System (GNSS) markers in the Hindu Kush (NE-Afghanistan) and the North Pamir front (Alai valley) and measured a total of 25 new and existing markers, if possible annually between 2014 and 2020 in survey mode. The stations are positioned along three profiles crossing the NE-striking Panjsheer fault and N-striking Badakhshan fault in the Hindu Kush, and the E-striking Pamir thrust system at the Trans Alai Range. The Hindu Kush survey data are the first of their kind in Afghanistan. The Pamir profile densifies a 1 Hz-GNSS profile that was installed in the Altyndara valley in 2013-2015; the GNSS time-series are affected by the 2015 Mw7.2 Sarez, Central Pamir, earthquake and probably the 2016 Mw6.4 Sary-Tash earthquake. The data are presented in receiver independent exchange (RNX) format and complemented by logsheets, field photos and a technical report describing the surveys in more detail.

Description: 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.

Description: This data set is digital image correlation data, including surface displacement and strain data from laboratory subduction megathrust earthquake cycles. The data consists of grids of surface strain (elastic and permanent), trench-normal surface displacement, vorticity and divergence maps over analog seismic cycles, and time series of surface displacement. The data have been derived using a stereo camera setup and processed with LaVision Davis 10 software. Detailed descriptions of the experiments and results regarding the surface pattern of the strain can be found in Kosari et al. (2023), to which this data set is supplementary. We use three configurations to mimic the along-strike heterogeneous spatiotemporal distribution of frictional locking (Rosenau et al., 2019; Kosari et al., 2022b). A central patch separates two stick-slip zones as an aseismic barrier in all configurations. The frictional properties of the central patch vary as a velocity-strengthening (VS configuration), a velocity-neutral (VN), and a velocity-weakening (VW configuration). The VW zone generates smaller slip events with a higher frequency (i.e., recurrence interval) than the stick-slip zones. Four frictionally different materials have been emplaced on the interface: The sticky-rice as velocity-weakening material (a-blt;0) resulting in stick-slip cycles simulating earthquake cycles, fine-grained sugar and rubber-sand mixture as velocity-strengthening (a-bgt;0) and velocity-neutral (a-b=0) material, and fine-grained salt as velocity-weakening material (a-blt;0) (Kosari et al., 2023).