Plio-Quaternary Extension and Strike-Slip Tectonics in the Aegean

Sakellariou, Dimitris; Tsampouraki-Kraounaki, Konstantina

doi:10.1016/b978-0-12-812064-4.00014-1

Cited by 50 publications

(59 citation statements)

References 138 publications

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“…Fault plane solutions showed the activation of an E-W striking normal fault, which is likely dipping to the north [2,3] (Figure 1). Such a focal mechanism is consistent with the tectonic setting of the area [4][5][6][7][8][9][10]. The largest aftershock occurred a few hours after the main event (30 October 2020, 15:14:57 UTC) and its magnitude was calculated as Mw = 5.0 [1].…”

Section: Introductionsupporting

confidence: 64%

Primary and Secondary Environmental Effects Triggered by the 30 October 2020, Mw = 7.0, Samos (Eastern Aegean Sea, Greece) Earthquake Based on Post-Event Field Surveys and InSAR Analysis

et al. 2021

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On 30 October 2020, an Mw = 7.0 earthquake struck the eastern Aegean Sea. It triggered earthquake environmental effects (EEEs) on Samos Island detected by field surveys, relevant questionnaires, and Interferometric Synthetic Aperture Radar (InSAR) analysis. The primary EEEs detected in the field comprise coseismic uplift imprinted on rocky coasts and port facilities around Samos and coseismic surface ruptures in northern Samos. The secondary EEEs were mainly observed in northern Samos and include slope failures, liquefaction, hydrological anomalies, and ground cracks. With the contribution of the InSAR, subsidence was detected and slope movements were also identified in inaccessible areas. Moreover, the type of the surface deformation detected by InSAR is qualitatively identical to field observations. As regards the EEE distribution, effects were generated in all fault blocks. By applying the Environmental Seismic Intensity (ESI-07) scale, the maximum intensities were observed in northern Samos. Based on the results from the applied methods, it is suggested that the northern and northwestern parts of Samos constitute an almost 30-km-long coseismic deformation zone characterized by extensive primary and secondary EEEs. The surface projection of the causative offshore northern Samos fault points to this zone, indicating a depth–surface connection and revealing a significant role in the rupture propagation.

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Section: Introductionsupporting

confidence: 64%

Primary and Secondary Environmental Effects Triggered by the 30 October 2020, Mw = 7.0, Samos (Eastern Aegean Sea, Greece) Earthquake Based on Post-Event Field Surveys and InSAR Analysis

et al. 2021

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“…Figure 1a presents the major active faults of the broader Samos area, as presented in several active fault databases (e.g., GreDaSS; Caputo et al 2012;Sboras 2012;NOAv3.0;Ganas et al 2020), as well as from other researchers (Mountrakis et al 2003;Chatzipetros et al 2013;Sakellariou and Tsampouraki-Kraounaki 2019). In the same plot, fault plane solutions (FPS) from moderate to strong events (M ≥ 4.5) for the same area are presented, classified according to their type.…”

Section: Geotectonic Setting and Historical Seismicitymentioning

confidence: 99%

On rapid multidisciplinary response aspects for Samos 2020 M7.0 earthquake

et al. 2021

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Following the M 7.0 earthquake that struck the Greek island of Samos and Turkey's western coast, causing extensive damage and casualties, we combined existing knowledge geodatabases concerning historical seismicity and rupture zones with seismological and geodetic measurements as well as with modelling and in situ observations, to provide an assessment of rapid response to the seismic event. In this paper, we demonstrate that in the frame of the gradual provision of information from the individual scientific disciplines, taking into account their respective potential and limitations, a multidisciplinary approach is able to address more efficiently rapid response issues in order to allow effective preliminary interpretation of the earthquake activity, even within the first 24 h of the event. It focuses on the assessment of the timely provision of information by each discipline, evaluating the access to primary data sources as well as the maturity of the techniques in terms of accuracy and rapid data processing. Within a period of less than a week, several constraints were partially compensated for, allowing the delivery of more robust results and interpretation. The study highlights the readiness level of the various domains that has been significantly improved over the past years, including rapid seismological solutions, systematic availability of free and open Earth Observation data and on-demand online processing through dedicated platforms. Their combination with routinely applied inversion modelling and timely in situ observation is leading to improved operational response levels. Supplementary Information The online version contains supplementary material available at 10.1007/s11600-021-00578-6.

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“…Active normal faults in the Crete region have been mapped onshore in the field (Caputo et al, 2006(Caputo et al, , 2010Fassoulas, 1999Fassoulas, , 2001Gallen et al, 2014;Ganas et al, 2018;Mason et al, 2016;Mountrakis et al, 2012;Mouslopoulou et al, 2014;Veliz et al, 2018; this study), and in the surrounding offshore using seismicreflection and multibeam bathymetry data (Andronikidis et al, 2018;Kokinou et al, 2012;Sakellariou & Tsampouraki-Kraounaki, 2019). Active normal faulting in the upper crust of the Crete region is also supported by microseismicity recorded by ocean bottom seismographs (Becker et al, 2010).…”

Section: Tectonic Setting and Active Faultsmentioning

confidence: 82%

“…In many of these cases the position and orientation of the coastline is influenced by footwall uplift and/or hangingwall subsidence (see A, B, C, D, and E in Figures 2a and 2b). In most cases, the seafloor bathymetry surrounding Crete is not sufficiently well known to map these faults offshore and to estimate their total lengths (Robertson et al., 2019; Sakellariou & Tsampouraki‐Kraounaki, 2019). Therefore, earthquake parameters (magnitude, SED, and RIs) calculated for these censored faults are regarded as minimums.…”

Section: Data and Samplingmentioning

confidence: 99%

Displacement Accumulation and Sampling of Paleoearthquakes on Active Normal Faults of Crete in the Eastern Mediterranean

Nicol

Mouslopoulou

Begg

et al. 2020

Geochem Geophys Geosyst

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Active fault traces generally form due to displacement of the ground surface or seabed during surface-rupturing earthquakes (Gilbert, 1884; McCalpin, 2009; Stein et al., 1988; Wallace, 1987) (Figure 1). Repeated surface-rupturing earthquakes can produce topography, the height of which depends on the total fault displacement and the relative rates of fault displacement and surface processes (i.e., deposition or erosion) (Figure 1, block diagram). Where sedimentation rates exceed fault displacement rates, the faults are buried and their growth histories can be recovered from subsurface information, including seismic reflection lines and trenches (

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Plio-Quaternary Extension and Strike-Slip Tectonics in the Aegean

Cited by 50 publications

References 138 publications

Primary and Secondary Environmental Effects Triggered by the 30 October 2020, Mw = 7.0, Samos (Eastern Aegean Sea, Greece) Earthquake Based on Post-Event Field Surveys and InSAR Analysis

Primary and Secondary Environmental Effects Triggered by the 30 October 2020, Mw = 7.0, Samos (Eastern Aegean Sea, Greece) Earthquake Based on Post-Event Field Surveys and InSAR Analysis

On rapid multidisciplinary response aspects for Samos 2020 M7.0 earthquake

Displacement Accumulation and Sampling of Paleoearthquakes on Active Normal Faults of Crete in the Eastern Mediterranean

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