Models and Techniques in Geodetic Monitoring of Tectonic Deformations in Greece

Rossikopoulos, Dimitrios; Fotiou, A.; Pikridas, Christos; Bitharis, Stylianos

doi:10.12681/bgsg.11874

Cited by 2 publications

(1 citation statement)

References 34 publications

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“…The GAMIT software uses the LC or L3 ionosphere-free linear combination of GPS phase observables by applying a double differencing technique to eliminate phase biases related to drifts in the satellite and receiver clock oscillators (Fotiou and Pikridas 2012). Tropospheric refraction signi cantly affects the high performance of GNSS position estimations with impact mostly on height component, to reduce it we use the GPT2 model for a-priori atmospheric parameters (Lagler et al 2013) and Vienna Mapping Functions 1 (VMF1) grids (Boehm et al 2006), were includes the meteorological coe cients as derived from gridded reanalysis of European Centre for Medium-Range Weather, improving the Zenith Wet Delay (ZWD)…”

Section: Geodetic Data Analysismentioning

confidence: 99%

GNSS data analysis and updated geodetic velocity field in Greece

Bitharis

Pikridas

Fotiou

et al. 2023

Preprint

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In this study an updated crustal velocity field for the Greece area was estimated using a time series analysis that covers a duration of 16 years from 227 Global Navigation Satellite System (GNSS) permanent stations. The GNSS processing was carried out using GNSS Analysis software at MIT (GAMIT) and the velocity field expressed with respect to Eurasian plate. For the time-series analysis, we applied a robust Median Interannual Difference Adjusted for Skewness (MIDAS) trend estimator to mitigate the effects of discontinuities due to geophysical phenomena on the estimation of geodetic velocities and their uncertainties. We also compare our geodetic velocities with five previous publications, where we found consistency at the mm/year level, leading to reliable results for the geodynamic behavior of the Greek area, providing a dense velocity field.

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Section: Geodetic Data Analysismentioning

confidence: 99%

GNSS data analysis and updated geodetic velocity field in Greece

Bitharis

Pikridas

Fotiou

et al. 2023

Preprint

View full text Add to dashboard Cite

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Monitoring of Tectonic Movements in the Adriatic Region Through National Permanent Satellite Networks

Bejko,

Ormeni,

Sina

et al. 2023

SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings

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The purpose of this study is the analysis of the dynamics of tectonic movements accompanied by two strong seismic events that occurred in the Durres area (Albania) in September-November 2019, through the use of GNSS technology, applied to national permanent satellite geodetic networks. Previous studies have been carried out on our study area by foreign authors from Croatia, Greece, and Italy. For our study case, we relied on geodetic weekly data secured from the Bulletins of Italian and Austrian stations, BSW52, of some of the constituent points of the two national permanent satellite networks of Italy (5 points) and Albania (6 points), located on both sides of the dividing line between the Eurasian tectonic plate and the Adriatic microplate. The analysis of the data secured in 7 campaigns was carried out by grouping them into 3 main analysis periods: the period before the September earthquake (F1-F4, called A), the period during the earthquakes (F4-F5, called B), and the period after the November earthquake (F5-F7, called C). It turns out that in plan the speed of movement in the area is: -0.00294m/year for period (A), -0.01912m/year for period (B), and -0.00305m/year for period (C). While in height, the speeds of movement are: 0.00130m/year for period (A), -0.04268m/year for period (B), and 0.00273m/year for period (C). These vectors also show us that the intensity T between period (B) and the average periods (A, C) is about 17 times in plan and 42 times in height. Combined this analysis with data that includes strong consecutive seismic events in the area, we believe that this intensity T can lead us to the most accurate predictability of the moment of the occurrence of the next tectonic energy release, thus of the next earthquake.

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Models and Techniques in Geodetic Monitoring of Tectonic Deformations in Greece

Abstract: Abstract

Cited by 2 publications

References 34 publications

GNSS data analysis and updated geodetic velocity field in Greece

GNSS data analysis and updated geodetic velocity field in Greece

Monitoring of Tectonic Movements in the Adriatic Region Through National Permanent Satellite Networks

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