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Research Article Open access CC BY 4.0

Cephalonia-lefkas Transform Fault Zone (CLTFZ) Complexity: Insights from 2015 Lefkas Earthquake Sequence

Andreas Karakonstantis, Kyriaki Pavlou, Vasilis Kapetanidis, Georgios Bozionelos

Journal of Geography, Environment and Earth Science International · pp. 1–12 · Published 18 May 2019

10.9734/jgeesi/2019/v21i130119

Abstract

In order to define a better model for the Cephalonia-Lefkas Transform Fault Zone the sequence of 2015 Lefkas earthquake was examined. On 17 November 2015 (07:10 GMT) a major earthquake (Mw=6.4) occurred on the central-western part of Lefkas island. Several destructive events were located in the past in this fault zone, so an extensive seismotectonic study is feasible for that area. Manual analysis was performed using a custom velocity model that was determined for that purpose, applying the average travel-time residuals and location uncertainties errors minimization method. Several clusters belonging to the aftershock sequence were identified, whereas three are directly related to the causative fault, covering an area of about 25 km. The central one, which includes the mainshock, comprises of only a few aftershocks. The northern, within which the majority of aftershocks are located, lies in the central part of Lefkas island and the southern occurred close to the SW edge of the island. In addition, offshore clusters with distinct characteristics have been identified to the south, between Lefkas and Cephalonia islands. The temporal evolution of the aftershock sequence indicates that no migration was observed, given that after the occurrence of the mainshock the entire epicentral area was activated. Focal mechanisms of the Seismological Laboratory of the University of Athens showed dextral strike-slip faulting for both mainshock and major aftershocks of the sequence. Taking into account the spatial distribution of the aftershocks, supported by the tectonic and geomorphological settings of the region, a deformation pattern, consisting of the Cephalonia-Lefkas and Ithaca-Lefkas major fault zones which converge in the area of Vassiliki bay is proposed. The appearance of the southernmost clusters was interpreted by the positive Coulomb stress changes transfer due to major earthquake Mw=6.4.

Seismotectonic analysis releasing bends restraining bends lefkas aftershock sequence Western Greece

References (17)

  1. 1 Initial reference models in local earthquake tomography [DOI]
  2. 2 Forecasting the evolution of seismicity in southern California: Animations built on earthquake stress transfer [DOI]
  3. 3 Active tectonics of the Adriatic Region [DOI]
  4. 4 An updated and extended earthquake catalogue for Greece and adjacent areas since 1900 [DOI]
  5. 5 The seismotectonics of the Marmara region (Turkey): results from a microseismic experiment [DOI]
  6. 6 EVOLUTION AND PETROLEUM POTENTIAL OF WESTERN GREECE [DOI]
  7. 7 Tectonic and sedimentological evolution of the Pliocene–Quaternary basins of Zakynthos island, Greece: case study of the transition from compressional to extensional tectonics [DOI]
  8. 8 Crustal deformation in the Central Ionian Islands (Greece): Results from DGPS and DInSAR analyses (1995–2006) [DOI]
  9. 9 Tectonics and sedimentation in the Gulf of Corinth and the Zakynthos and Kefallinia channels, Western Greece [DOI]
  10. 10 Minimum 1D velocity models in Central and Southern Italy: a contribution to better constrain hypocentral determinations [DOI]
  11. 11 Fault modelling of the early-2014 ~M6 Earthquakes in Cephalonia Island (W. Greece) based on GPS measurements [DOI]
  12. 12 The spatially extended 2006 April Zakynthos (Ionian Islands, Greece) seismic sequence and evidence for stress transfer [DOI]
  13. 13 Analysis and interpretation of the aftershock sequence of the August 17, 1999, Izmit (Turkey) earthquake [DOI]
  14. 14 Genetic algorithm inversion of the average 1D crustal structure using local and regional earthquakes [DOI]
  15. 15 Trajectories of crustal deformation of western Greece from GPS observations 1989–1994 [DOI]
  16. 16 The Ionian Islands earthquakes of 1767 and 1769: seismological aspects. Contribution of historical information to a realistic seismicity and hazard assessment of an area
  17. 17 Magnitude Scales in Central Greece [DOI]

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