A detailed analysis of microseismicity in Samos and Kusadasi (Eastern Aegean Sea) areas

Tan, Onur; Papadimitriou, Eleftheria; Pabuçcu, Zümer; Karakostas, V.; Yörük, Ahmet; Leptokaropoulos, Konstantinos

doi:10.2478/s11600-013-0194-1

Cited by 38 publications

(28 citation statements)

References 25 publications

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“…In Fig. 1b, we present the broader Samos area, historical and pre-1965 (early instrumental) seismicity (M ≥ 5.0, yellow circles) from the catalog of Papazachos et al (2000), as well as the recent instrumentally recorded seismicity between 1965 and 2010 (M ≥ 3.5, white circles), as relocated by Tan et al (2014) and homogenized as far as earthquake magnitudes concern by Leptokaropoulos et al (2013). In the same plot, we also present the major historical and twentieth-century earthquakes in the vicinity of Samos since mid-eighteenth century (red circles), as presented in Papazachos and Papazachou (2003) and the sources listed by the same authors.…”

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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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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“…These include the M 6.8 1955 Söke earthquake, M 7.7 July 1956 earthquake between Nazos and Santorini, and an associated M 7.2 aftershock. The1967 Skyros (M 6.6), 1969 Alaşehir (M 6.7), and 1970 Gediz (M 6.9) earthquakes are other significant earthquakes of the Aegean and western Anatolia extensional system 52 – 55 . The most recent, significant event before the Samos Earthquake was a M 6.6 earthquake on July 20, 2017 near Bodrum, on the southwest coast of Turkey ( https://earthquake.usgs.gov/earthquakes/eventpage/us20009ynd/executive ).…”

Section: Historical Earthquakes and Volcanic Eruptionsmentioning

confidence: 99%

Greece and Turkey Shaken by African tectonic retreat

Meng

Sinoplu

Zhou

et al. 2021

Sci Rep

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Earthquakes are a consequence of the motions of the planet’s tectonic plates, yet predicting when and where they may occur, and how to prepare remain some of the shortcomings of using scientific knowledge to protect human life. A devastating Mw 7.0 earthquake on October 30, 2020, offshore Samos Island, Greece was a consequence of the Aegean and Anatolian upper crust being pulled apart by north–south extensional stresses resulting from slab rollback, where the African plate is subducting northwards beneath Eurasia, while the slab is sinking by gravitational forces, causing it to retreat southwards. Since the retreating African slab is coupled with the overriding plate, it tears the upper plate apart as it retreats, breaking it into numerous small plates with frequent earthquakes along their boundaries. Historical earthquake swarms and deformation of the upper plate in the Aegean have been associated with massive volcanism and cataclysmic devastation, such as the Mw 7.7 Amorgos earthquake in July 1956 between the islands of Naxos and Santorini (Thera). Even more notable was the eruption of Santorini 3650 years ago, which contributed to the fall of the Minoan civilization. The Samos earthquake highlights the long historical lack of appreciation of links between deep tectonic processes and upper crustal deformation and geological hazards, and is a harbinger of future earthquakes and volcanic eruptions, establishing a basis for studies to institute better protection of infrastructure and upper plate cultures in the region.

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“…More recently, moderate earthquake activity associated with normal faulting of an E-W trend and magnitudes ranging from Mw = 5.5 to Mw = 5.9 was recorded in the area north of Samos Island during October 2005 [40]. Microseismicity concentrated in distinctive clusters was recorded near Samos and Kusadasi Bay from July 2007 to September 2012, showing predominance of normal faulting with a significant contribution of strike-slip motion [41].…”

Section: Seismicity Of the Samos Island Areamentioning

confidence: 99%

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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A detailed analysis of microseismicity in Samos and Kusadasi (Eastern Aegean Sea) areas

Cited by 38 publications

References 25 publications

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

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

Greece and Turkey Shaken by African tectonic retreat

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

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