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Relocation of the 2018 Zakynthos, Greece, aftershock sequence: spatiotemporal analysis deciphering mechanism diversity and aftershock statistics
An M w 6.8 earthquake occurred on October 25, 2018, 35 km offshore from the southwest coastlines of Zakynthos Island. The aftershock sequence appeared remarkably productive with six aftershocks of M ≥ 5.0 in the first month and tens of aftershocks with M ≥ 4.0 during the study period. The GCMT sol...
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| Published in: | Acta geophysica 2020-10, Vol.68 (5), p.1263-1294 |
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| Main Authors: | , , , |
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| Language: | English |
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| container_title | Acta geophysica |
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| creator | Karakostas, V. Kostoglou, A. Chorozoglou, D. Papadimitriou, E. |
| description | An
M
w
6.8 earthquake occurred on October 25, 2018, 35 km offshore from the southwest coastlines of Zakynthos Island. The aftershock sequence appeared remarkably productive with six aftershocks of
M
≥ 5.0 in the first 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 first 200 days. Time series analysis constructed from the aftershock frequency and seismic moment release and manifested significant correlation among the eight seismicity clusters. |
| doi_str_mv | 10.1007/s11600-020-00483-4 |
| format | article |
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M
w
6.8 earthquake occurred on October 25, 2018, 35 km offshore from the southwest coastlines of Zakynthos Island. The aftershock sequence appeared remarkably productive with six aftershocks of
M
≥ 5.0 in the first 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 first 200 days. Time series analysis constructed from the aftershock frequency and seismic moment release and manifested significant correlation among the eight seismicity clusters.</description><identifier>ISSN: 1895-6572</identifier><identifier>EISSN: 1895-7455</identifier><identifier>DOI: 10.1007/s11600-020-00483-4</identifier><language>eng</language><publisher>Cham: Springer International Publishing</publisher><subject>Aftershocks ; Clusters ; Earth and Environmental Science ; Earth Sciences ; Earthquakes ; Geological faults ; Geophysics/Geodesy ; Geotechnical Engineering & Applied Earth Sciences ; Relocation ; Research Article - Solid Earth Sciences ; Seismic activity ; Seismicity ; Statistical analysis ; Stress transfer ; Structural Geology ; Subduction (geology) ; Time series</subject><ispartof>Acta geophysica, 2020-10, Vol.68 (5), p.1263-1294</ispartof><rights>Institute of Geophysics, Polish Academy of Sciences & Polish Academy of Sciences 2020</rights><rights>Institute of Geophysics, Polish Academy of Sciences & Polish Academy of Sciences 2020.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a342t-d784a175b9feb70d06efa664e837493cf86cba4bbe955f01e4d2ca42f77b37863</citedby><cites>FETCH-LOGICAL-a342t-d784a175b9feb70d06efa664e837493cf86cba4bbe955f01e4d2ca42f77b37863</cites><orcidid>0000-0003-3574-2787</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27922,27923</link.rule.ids></links><search><creatorcontrib>Karakostas, V.</creatorcontrib><creatorcontrib>Kostoglou, A.</creatorcontrib><creatorcontrib>Chorozoglou, D.</creatorcontrib><creatorcontrib>Papadimitriou, E.</creatorcontrib><title>Relocation of the 2018 Zakynthos, Greece, aftershock sequence: spatiotemporal analysis deciphering mechanism diversity and aftershock statistics</title><title>Acta geophysica</title><addtitle>Acta Geophys</addtitle><description>An
M
w
6.8 earthquake occurred on October 25, 2018, 35 km offshore from the southwest coastlines of Zakynthos Island. The aftershock sequence appeared remarkably productive with six aftershocks of
M
≥ 5.0 in the first 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 first 200 days. Time series analysis constructed from the aftershock frequency and seismic moment release and manifested significant correlation among the eight seismicity clusters.</description><subject>Aftershocks</subject><subject>Clusters</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Earthquakes</subject><subject>Geological faults</subject><subject>Geophysics/Geodesy</subject><subject>Geotechnical Engineering & Applied Earth Sciences</subject><subject>Relocation</subject><subject>Research Article - Solid Earth Sciences</subject><subject>Seismic activity</subject><subject>Seismicity</subject><subject>Statistical analysis</subject><subject>Stress transfer</subject><subject>Structural Geology</subject><subject>Subduction (geology)</subject><subject>Time series</subject><issn>1895-6572</issn><issn>1895-7455</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9kM1qHDEQhAcTgzfrvIBPAl89jn5Hs76ZJd4EDIFgX3IRGk3Lo_0ZjdXawL5FHtnarCHkkkPTfaj66KqqumL0llGqPyNjDaU15WWobEUtz6oZaxeq1lKpD-93ozS_qD4iriltJGV8Vv3-AdvobA5xJNGTPADhlLXkp90cxjxEvCGrBODghlifIeEQ3YYgvO5hdHBHcDp6M-ymmOyW2NFuDxiQ9ODCNEAK4wvZgRvsGHBH-vCrIEI-FGH_DzAXDObg8LI693aL8Ol9z6vnhy9Py6_14_fVt-X9Y22F5LnudSst06pbeOg07WkD3jaNhFZouRDOt43rrOw6WCjlKQPZc2cl91p3QreNmFfXJ-6UYgmD2azjPpX30XCpKBdccVFU_KRyKSIm8GZKYWfTwTBqjs2bU_OmNG_-NG9kMYmTCadjfkh_0f9xvQFiLImK</recordid><startdate>20201001</startdate><enddate>20201001</enddate><creator>Karakostas, V.</creator><creator>Kostoglou, A.</creator><creator>Chorozoglou, D.</creator><creator>Papadimitriou, E.</creator><general>Springer International Publishing</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KL.</scope><scope>KR7</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0003-3574-2787</orcidid></search><sort><creationdate>20201001</creationdate><title>Relocation of the 2018 Zakynthos, Greece, aftershock sequence: spatiotemporal analysis deciphering mechanism diversity and aftershock statistics</title><author>Karakostas, V. ; Kostoglou, A. ; Chorozoglou, D. ; Papadimitriou, E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a342t-d784a175b9feb70d06efa664e837493cf86cba4bbe955f01e4d2ca42f77b37863</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Aftershocks</topic><topic>Clusters</topic><topic>Earth and Environmental Science</topic><topic>Earth Sciences</topic><topic>Earthquakes</topic><topic>Geological faults</topic><topic>Geophysics/Geodesy</topic><topic>Geotechnical Engineering & Applied Earth Sciences</topic><topic>Relocation</topic><topic>Research Article - Solid Earth Sciences</topic><topic>Seismic activity</topic><topic>Seismicity</topic><topic>Statistical analysis</topic><topic>Stress transfer</topic><topic>Structural Geology</topic><topic>Subduction (geology)</topic><topic>Time series</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Karakostas, V.</creatorcontrib><creatorcontrib>Kostoglou, A.</creatorcontrib><creatorcontrib>Chorozoglou, D.</creatorcontrib><creatorcontrib>Papadimitriou, E.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Acta geophysica</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Karakostas, V.</au><au>Kostoglou, A.</au><au>Chorozoglou, D.</au><au>Papadimitriou, E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Relocation of the 2018 Zakynthos, Greece, aftershock sequence: spatiotemporal analysis deciphering mechanism diversity and aftershock statistics</atitle><jtitle>Acta geophysica</jtitle><stitle>Acta Geophys</stitle><date>2020-10-01</date><risdate>2020</risdate><volume>68</volume><issue>5</issue><spage>1263</spage><epage>1294</epage><pages>1263-1294</pages><issn>1895-6572</issn><eissn>1895-7455</eissn><abstract>An
M
w
6.8 earthquake occurred on October 25, 2018, 35 km offshore from the southwest coastlines of Zakynthos Island. The aftershock sequence appeared remarkably productive with six aftershocks of
M
≥ 5.0 in the first 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 first 200 days. Time series analysis constructed from the aftershock frequency and seismic moment release and manifested significant correlation among the eight seismicity clusters.</abstract><cop>Cham</cop><pub>Springer International Publishing</pub><doi>10.1007/s11600-020-00483-4</doi><tpages>32</tpages><orcidid>https://orcid.org/0000-0003-3574-2787</orcidid></addata></record> |
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| language | eng |
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| subjects | Aftershocks Clusters Earth and Environmental Science Earth Sciences Earthquakes Geological faults Geophysics/Geodesy Geotechnical Engineering & Applied Earth Sciences Relocation Research Article - Solid Earth Sciences Seismic activity Seismicity Statistical analysis Stress transfer Structural Geology Subduction (geology) Time series |
| title | Relocation of the 2018 Zakynthos, Greece, aftershock sequence: spatiotemporal analysis deciphering mechanism diversity and aftershock statistics |
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