Relocation of the 2018 Zakynthos, Greece, aftershock sequence: spatiotemporal analysis deciphering mechanism diversity and aftershock statistics

Karakostas, V.; Kostoglou, A.; Chorozoglou, D.; Papadimitriou, E.

doi:10.1007/s11600-020-00483-4

Artykuł - szczegóły

Tytuł artykułu

Relocation of the 2018 Zakynthos, Greece, aftershock sequence: spatiotemporal analysis deciphering mechanism diversity and aftershock statistics

Autorzy

Karakostas V. , Kostoglou A. , Chorozoglou D. , Papadimitriou E.

Wybrane pełne teksty z tego czasopisma

https://www.springer.com/journal/11600

Identyfikatory

DOI

10.1007/s11600-020-00483-4

Warianty tytułu

Języki publikacji

Abstrakty

An Mw 6.8 earthquake occurred on October 25, 2018, 35 km ofshore from the southwest coastlines of Zakynthos Island. The aftershock sequence appeared remarkably productive with six aftershocks of M≥5.0 in the frst month and tens of aftershocks with M≥4.0 during the study period. The GCMT solution for the main shock suggests a very low angle plane (dip=24°) for a dextral strike–slip faulting (rake=165°). A similar solution is suggested for the largest aftershock (M_w 5.9) that occurred 5 days afterward. The proximity of the main shock location with the dextral active boundary of Kefalonia Transform Fault Zone (KTFZ) along with the Hellenic Subduction front supports this oblique faulting. The aftershock activity is comprised mostly in depths 5–12 km and forms eight distinctive clusters that accommodate regional strain and evidence strain partitioning. The role of stress transfer and statistical analysis are combined for detailing the highly productive aftershock sequence. Earthquake networks analysis reveals their random structure soon after the main shock, which became small-world structure after the frst 200 days. Time series analysis constructed from the aftershock frequency and seismic moment release and manifested signifcant correlation among the eight seismicity clusters.

Słowa kluczowe

stress transfer earthquake network analysis Zakynthos Greece seismic sequence spatiotemporal properties

przenoszenie naprężeń analiza sieci trzęsień ziemi Zakynthos Grecja

Wydawca

Instytut Geofizyki PAN
Springer

Czasopismo

Acta Geophysica

Rocznik

2020

Tom

Vol. 68, no. 5

Strony

1263--1294

Opis fizyczny

Bibliogr. 79 poz.

Twórcy

autor

Karakostas V.

vkarak@geo.auth.gr

Geophysics Department, Aristotle University of Thessaloniki, GR54124 Thessaloniki, Greece

autor

Kostoglou A.

akostogl@geo.auth.gr

Geophysics Department, Aristotle University of Thessaloniki, GR54124 Thessaloniki, Greece

autor

Chorozoglou D.

chorozod@geo.auth.gr

Geophysics Department, Aristotle University of Thessaloniki, GR54124 Thessaloniki, Greece

autor

Papadimitriou E.

ritsa@geo.auth.gr

Geophysics Department, Aristotle University of Thessaloniki, GR54124 Thessaloniki, Greece

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