Left-lateral shear inside the North Gulf of Evia Rift, Central Greece, evidenced by relocated earthquake sequences and moment tensor inversion

Ganas, Athanassios; Mouzakiotis, E.; Moshou, Alexandra; Karastathis, V.

doi:10.1016/j.tecto.2016.05.031

Cited by 11 publications

(14 citation statements)

References 38 publications

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“…5). These findings are consistent with present-day seismic activity and focal mechanisms showing coeval E-striking normal faulting, sinistral normal activity along these NW-striking faults (Kiratzi and Louvari, 2003;Ganas et al, 2016), as well as N-S strain rate directions inferred from GPS data (Davies et al, 1997;Reilinger et al, 2006;Hollenstein et al, 2008;Pérouse et al, 2012). Similar conclusions were proposed further North, close to the Olympus Mount (e.g.…”

Section: Stress Regimes In Mid Miocene and Plio Quaternary Timessupporting

confidence: 88%

“…Families 2 and 3 having similar fault plane orientations with markedly different slip orientations suggests that they belong to distinct tectonics phases, which is further supported by occasional slickensline record of these different slips on the same fault. Families ( 1) and ( 2) are seismically active today (Roberts and Jackson, 1991;Papanikolaou and Royden, 2007;Ganas et al, 2016), Our structural data show that NW-striking faults (with dip slip, Family 3) are synchronous with middle Miocene basin deposition. Family 3 was therefore active in middle Miocene, at a different period of time compare with families 1 and 2.…”

Section: 3b Datasetmentioning

confidence: 64%

“…1 and 2; Papanikolaou and Royden, 2007). These high-angle faults are seismically active today with dip-slip normal (E-striking faults) and oblique sinistral and normal (NW-striking faults) kinematics (Roberts and Jackson, 1991;Kiratzi and Louvari, 2003;Papanikolaou and Royden, 2007;Ganas et al, 2016). middle Miocene basins in Evvia manuscript submitted to Tectonics 5 and Attica are also observed close to the NE-striking Pelagonian Fault (Figs.…”

Section: Geological Settingmentioning

confidence: 90%

“…The present-day seismic activity shows consistently oblique sinistral on NW-striking faults (Roberts and Jackson, 1991;Papanikolaou and Royden, 2007;Ganas et al, 2016). On these bases, we will define therefore two fault families: NW-striking with dip slip (supposed to be active in middle Miocene, see below) and NWstriking with oblique slip (supposed to be active in Plio-Quaternary as suggested by the present-day seismic activity - Ganas et al, 2016) A NE-SW cross-section (orthogonal to the major normal fault 1, Fig. 3C) shows the relationship between NW-striking faults and the basin bedding.…”

Section: The Limni Basin and Nw-striking Normal Faultsmentioning

confidence: 99%

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Dextral Strike‐Slip and Normal Faulting During Middle Miocene Back‐Arc Extension and Westward Anatolia Extrusion in Central Greece

et al. 2021

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Section: Stress Regimes In Mid Miocene and Plio Quaternary Timessupporting

confidence: 88%

Section: 3b Datasetmentioning

confidence: 64%

Section: Geological Settingmentioning

confidence: 90%

Section: The Limni Basin and Nw-striking Normal Faultsmentioning

confidence: 99%

See 2 more Smart Citations

Dextral Strike‐Slip and Normal Faulting During Middle Miocene Back‐Arc Extension and Westward Anatolia Extrusion in Central Greece

et al. 2021

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“…The methodology that was used in this study is applied to the seven largest events that occurred recently in Greece. Mountain (Central Greece) [26] and finally the most recent event the 2014 Kefallinia Island were determined using the proposed methodology. For this purpose, regional data from Hellenic Unified Seismological Network, with epicentral distances less than 350 km, were selected and analyzed.…”

Section: Discussionmentioning

confidence: 99%

Strong Earthquake Sequences in Greece during 2008-2014: Moment Tensor Inversions and Fault Plane Discrimination

Moshou¹

2020

OJER

Self Cite

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As is well known, Greece has a significant number of earthquakes each year. Ιn recent years, several earthquakes have occurred in Greece. For this scope, a methodology was used to determine the source parameters. This methodology is based on minimizing the difference between the observed and the synthetic waveforms, using the method Source Parameters Calculation-SPCa [1]. The source parameters, using the proposed methodology, are calculated by comparing observed seismograms and synthetic by inverting data. The synthetics are calculated using the reflectivity method (Kennett, 1983) as implemented by Randall et al. (1994) for a given earth structure. This study includes inversion results for the strongest events that occurred in Greece from 2008 to 2014. For the same events calculated the main fault plane, using the method of Hypocenter Centroid-plot (HC-plot) [2] [3]. This methodology is a simple geometrical method based on the combination between the hypocentral position and the two possible fault planes.

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The 2022–2023 seismic sequence onshore South Evia, central Greece: evidence for activation of a left-lateral strike-slip fault and regional triggering of seismicity

Serpetsidaki,

Ganas

2024

J Seismol

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On 29 November 2022, an earthquake of ML 5.0 (Mw 4.8) occurred onshore South Evia Island (central Greece) preceded by a ML 4.7 (Mw 4.6) event. The pattern of relocated aftershocks indicates the activation of a single, near-vertical fault segment, oriented NW-SE at shallow crustal depths (6–11 km). We suggest that both events ruptured a blind, left-lateral strike-slip fault, about 5 km southeast of village Almyropotamos. We observed that a clear foreshock activity (N=55 events) existed before the two moderate events. The impact of the static stress loading on neighboring fault planes diminishes after a distance of 7 km from the November 2022 epicenters, where the static stress falls below +0.1 bar. We further explore triggering relationships between the 29 November events and the late December 2022 moderate events (ML 4.9) that occurred about 60 km toward NW in the Psachna and Vlahia regions of central Evia. We present evidence of possible delayed dynamic triggering of the late December 2022 central Evia sequence, based on marked changes in seismicity rates and on measured peak ground velocities (PGVs) and peak dynamic strains, both exhibiting local maxima in their map distributions. The causes of the delayed triggering may be related to the well-known geothermal field in central/north Evia and the NW-SE strike of the seismic fault.

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Left-lateral shear inside the North Gulf of Evia Rift, Central Greece, evidenced by relocated earthquake sequences and moment tensor inversion

Cited by 11 publications

References 38 publications

Dextral Strike‐Slip and Normal Faulting During Middle Miocene Back‐Arc Extension and Westward Anatolia Extrusion in Central Greece

Dextral Strike‐Slip and Normal Faulting During Middle Miocene Back‐Arc Extension and Westward Anatolia Extrusion in Central Greece

Strong Earthquake Sequences in Greece during 2008-2014: Moment Tensor Inversions and Fault Plane Discrimination

The 2022–2023 seismic sequence onshore South Evia, central Greece: evidence for activation of a left-lateral strike-slip fault and regional triggering of seismicity

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