WSEAS Transactions on Environment and Development
Print ISSN: 1790-5079, E-ISSN: 2224-3496
Volume 20, 2024
Analysis of Changes in Coordinates Before and After the Earthquake of 26 November 2019 of Geodetic Points in the Durres - Tirana Area
Authors: ,
Abstract: The earthquake that struck the Durres-Tirana area on November 26, 2019, significantly impacted the region’s geodetic points. Through this study, which presents the change of coordinates in plan and height in known Geodetic points (which are the Second-order passive network points of the Geodetic datum in the Durres - Tirana area), we aim to analyze the changes in coordinates of these points before and after the seismic event to understand better the deformation caused by the earthquake. It describes the geodetic equipment used to perform GNSS measurements, the GNSS measurement method, the Rinex data processing program, and the calculation of the final points coordinates of the selected geodetic points in the Durres-Tirana area. Rinex data with 1"" interval from the ALBCORS Global Positioning System were used to process GNSS measurements of measured points. Also, in the process of processing the coordinates of the points, the corrections of the daily and final ephemerides have been introduced. The coordinates are calculated in the official Geodetic system of Albania ""KRGJSH"" Geodetic Reference Frame of Albania. An assessment of the change in the coordinates of the points was made, including the analysis of the displacement vector of the points and the presentation of the shift graphically and analytically. The maximum change in the plan is 0.052 cm and the minimum change is 0.027 cm. The maximum change in height is 0.020 cm and the minimum change is -0.122 cm. It is recommended that GNSS measurements should be made at known geodetic points at a certain time interval to study local deformation processes in the Republic of Albania. The research encompasses both temporal and spatial analysis, evaluating the extent of displacement and deformation observed in the aftermath of the earthquake. Additionally, factors such as ground subsidence, and structural damage are considered in interpreting the observed changes in coordinates. The findings of this study provide valuable insights into the geodynamic processes triggered by the earthquake, aiding in the assessment of seismic hazards and the implementation of effective mitigation strategies in the Durres-Tirana region.
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Pages: 655-661
DOI: 10.37394/232015.2024.20.63