Technical gazette, Vol. 32 No. 5, 2025.
Original scientific paper
https://doi.org/10.17559/TV20241113002128
Integration of GPS Data and Seismic Events using Lomb-Scargle Spectral Analysis: a Study of GPS Station SPLT
Sanja Tucikešić
; University of Banja Luka Faculty of Architecture, Civil Engineering and Geodesy, Bulevar vojvode Petra Bojovica, 78000 Banja Luka, Bosnia and Herzegovina
*
Tanja Đukanović
; University of Banja Luka Faculty of Architecture, Civil Engineering and Geodesy, Bulevar vojvode Petra Bojovica, 78000 Banja Luka, Bosnia and Herzegovina
Branko Božić
; University of Belgrade Faculty of Civil Engineering, Bulevar kralja Aleksandra 73, 11000 Belgrade, Serbia
Ankica Milinković
; Escuela de Doctorado, Universidad de Jaén, 23071 Jaén, Kingdom of Spain
Sandra Kosić Jeremić
; University of Banja Luka Faculty of Architecture, Civil Engineering and Geodesy, Bulevar vojvode Petra Bojovica, 78000 Banja Luka, Bosnia and Herzegovina
* Corresponding author.
Abstract
This study analyzes the long-term and seasonal variations in the GPS time series of the SPLT station, located in a seismically active region. By integrating data on seismic events with a time series of GPS coordinates, we identify coseismic displacements, especially emphasizing the variability of the vertical component. In the analysis, the Lomb-Scargle spectral method was used to estimate the spectral indices after the detection of seismic events, and to obtain detailed information about the changes in the spectral characteristics of the series. The results show significant changes in vertical motion, with the largest coseismic displacement recorded on January 13, 2005, during the seismic swarm. Seasonal oscillations significantly affect the vertical components, which suggests the need for precise modelling to reduce inaccuracies. We also find that seismic activity introduces higher frequency energy into GPS signals, changing the values of the spectral indices, especially in the vertical axis. These studies highlight the effectiveness of integrating geodetic and seismic data for monitoring crustal deformations and their contribution to a more detailed understanding of seismic dynamics in the Adriatic basin.
Keywords
coseismic displacements; earthquakes; GPS continuous time series; Lomb-Scargle model; spectral analysis
Hrčak ID:
335061
URI
Publication date:
30.8.2025.
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