A New Velocity Field of Greece Based on Seven Years (2008–2014) Continuously Operating GPS Station Data

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

doi:10.1007/1345_2016_230

Cited by 16 publications

(11 citation statements)

References 16 publications

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“…A geodetic analysis was performed, based on the implementation of the kinematic information provided by the GPS data processing (Bitharis, 2015;Bitharis et al, 2016). In particular, the geodetic velocities are recorded by a dense network of 27 permanent GPS stations, while they are applied in order to determine the crustal deformation of Thessaly region.…”

Section: Crustal Deformationmentioning

confidence: 99%

Crustal deformation analysis of Thessaly (central Greece) before the March 2021 earthquake sequence near Elassona-Tyrnavos (northern Thessaly)

Lazos¹

2021

Acta Geodynamica Et Geomaterialia

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Thessaly lies on the Aegean (micro-)plate, undergoing internal crustal deformation due to the plate relative motion against the adjacent Anatolian and Nubian plates. As a result, the whole Thessalian Basin was supposed to be under an extensional tectonic regime of N-S direction. However, the recent earthquake sequence of March 2021 which occurred close to the northwestern margin of the basin revealed NE-SW direction of extension. Based on 7-year GPS measurements recorded by stations installed within and around the basin we assessed four deformational parameters for Thessaly aiming at the understanding of the deformation processes that control the region. These parameters are i) the Maximum Horizontal Extension (MAHE), ii) the Total Velocity (TV), iii) the Maximum Shear Strain (MSS), and iv) the Area Strain (AS). The results show that during the monitoring period, Thessaly moved toward the S-SW with a simultaneous clockwise rotation and underwent dispersed deformation mostly associated with dilatation. Focusing on the epicentral area of the 2021 sequence, strain during the 7-year period was rather low in all three strain parameters, implying a mature stage of elastic strain accumulation before the fault rupture.

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Section: Crustal Deformationmentioning

confidence: 99%

Crustal deformation analysis of Thessaly (central Greece) before the March 2021 earthquake sequence near Elassona-Tyrnavos (northern Thessaly)

Lazos¹

2021

Acta Geodynamica Et Geomaterialia

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“…A strong EQ have an effect on the time series analysis causing some discontinuities as offsets, which may lead to an unrealistic estimation of geodetic velocities (Bitharis et al, 2015). More generally (Tregoning et al, 2013) showed that large EQs can induce linear velocity errors of up to 0.4 mm/yr at sites over 1000 km from the earthquake locations.…”

Section: Time Series Daily Displacementsmentioning

confidence: 99%

The Samothrace Earthquake of May 2014 and the Displacements Estimations Using Permanent GPS Stations Data

et al. 2017

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“…The GPS/GNSS dataset, analyzed in previous studies (Bitharis, 2015;Bitharis et al, 2016), is exclusively based on a permanent GPS/GNSS network. Within the Corinth Gulf region, the permanent network includes 14 GPS/GNSS stations (Fig.…”

Section: Gps/gnss Data and Processingmentioning

confidence: 99%

“…The set of geodetic velocities is derived from a 7-year (2008-2014) daily GPS/GNSS data processing, using 155 permanent stations, distributed in the broader Greek territory and 30 IGS-EPN GPS/GNSS stations (Bitharis et al, 2016). In most sites the data span exceeds a 4-year period, while the velocities determination standard deviation in the Fig.…”

Section: Gps/gnss Data and Processingmentioning

confidence: 99%

Tectonic crustal deformation of Corinth Gulf, Greece, based on primary geodetic data

Lazos¹

2020

Acta Geodynamica Et Geomaterialia

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The broader Corinth Gulf region is characterized by a notable active tectonic regime, associated with multiple active fault zones. The continuous N-S extensional tectonics of the area is responsible for the roughly E-W trending active normal fault zones, while individual fault segments are associated with seismic events. Satellite geodesy is a qualitative and quantitative means of estimating the tectonically active setting, based on the recorded motions. The study area is monitored by 14 permanent GPS/GNSS stations, collecting primary geodetic data for a 7-year time period (2008-2014). A 30-sec observation rate was performed, resulting in the extraction of the GPS/GNSS velocity values. The primary geodetic data were processed by applying the triangulation methodology, based on the combination of three different GPS/GNSS stations data, which were considered as the triangle vertices. Triangulation methodology led to the construction of 26 different triangles, while for each of them a series of parameters was determined. In particular, the extracted parameters are: a) Maximum Horizontal Extension, b) Total Velocity, c) Maximum Shear Strain and d) Area Strain. The extracted results are expected to approach, qualitatively and quantitatively, the interpretation of the tectonic regime, as well as to determine new, seismic-related, tectonic features.

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A New Velocity Field of Greece Based on Seven Years (2008–2014) Continuously Operating GPS Station Data

Cited by 16 publications

References 16 publications

Crustal deformation analysis of Thessaly (central Greece) before the March 2021 earthquake sequence near Elassona-Tyrnavos (northern Thessaly)

Crustal deformation analysis of Thessaly (central Greece) before the March 2021 earthquake sequence near Elassona-Tyrnavos (northern Thessaly)

The Samothrace Earthquake of May 2014 and the Displacements Estimations Using Permanent GPS Stations Data

Tectonic crustal deformation of Corinth Gulf, Greece, based on primary geodetic data

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