No abstract

No abstract

We present the crustal deformation field in the Penola Strait – Lemaire Channel fault area (West Antarctica), based on the analysis of the 5 seasonal cycles of static GNSS survey. This 5 GNSS campaigns were conducted with approximately a 16-year interval from 2003 to 2019. The analyses indicate that average linear velocities of horizontal movements are multidirectional but no larger than 1 – 2 mm/yr. Average linear velocities of vertical movements are no larger than ±3 mm/yr. In the present work scheme of vertical and horizontal movements has been drawn out. The obtained results correlate well with the movements of the surrounding GNSS stations. Based on the analysis of spatial distribution of the Earth’s surface dilatation velocity the zones of extreme compression and expansion values were revealed. The analyses of spatial distribution of the Earth’s surface total shear velocity indicate that the studied region is horizontally heterogeneous. Based on the analysis of obtained results, a new kinematic model of fault area was developed. The possibility of using static GNSS survey to study recent local geodynamic processes in Antarctica has been demonstrated.

The aim of the study is to identify the recent local geodynamic processes on the territory of the Dniester PSPP (Ukraine), which arose as a result of the additional man-caused load during the construction of hydro-technical structures. The research is based on the results of 17 cycles of periodic static GNSS campaigns conducted during [2004][2005][2006][2007][2008][2009][2010][2011][2012][2013][2014][2015][2016][2017]. In this work the vectors of horizontal displacement of the reference GNSS network points of Dniester PSPP are determined and their scheme is constructed. On the basis of average vectors of horizontal movement velocities during 2004-2017, the value of the velocities of dilatation -the parameter of Earth surface deformation which characterises the relative area expansion or compression, is calculated. As a result of the analysis of velocity distribution of the dilatation of Dniester PSPP territory, the areas of extreme values of compression and stretching are revealed, which testify to the increased geodynamic activity of the pivot part, as well as the main structures of the construction. ARTICLE INFO

No abstract