Seismicity at the convergent plate boundary offshore Crete, Greece, observed by an amphibian network

Becker, Dirk; Meier, Thomas; Bohnhoff, Marco; Harjes, Hans-Peter

doi:10.1007/s10950-009-9170-2

Cited by 37 publications

(55 citation statements)

References 52 publications

(44 reference statements)

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“…Dense seismic sampling obtained from these stations enables us to create a high-resolution image of the Aegean plate and the descending African plate in the southern and central Aegean. We combine our results with hypocentre locations of the EHB-ISC catalogue for the western Hellenic subduction zone and with new accurate hypocentre locations recorded by the temporary CYCNET and EGELADOS networks (Brüstle, 2012;Brüs-tle et al, 2014) as well as hypocentre locations by the temporary LIBNET network (Becker et al, 2009) for the eastern Hellenic subduction zone and particularly discuss the correlation of P receiver function images and the hypocentre distribution.…”

mentioning

confidence: 76%

“…1) was taken from catalogues of manually picked hypocentre locations of temporary networks. This data set consists of about 3000 hypocentre locations (Brüstle, 2012;Brüstle et al, 2014) observed by the temporary EGELADOS network, of about 4000 relocated hypocentre locations (Brüstle et al, 2014) obtained by the temporary CYCNET network covering the central subduction zone from (Bohnhoff et al, 2004, and of about 2000 hypocentre locations of the temporary LIBNET network (Becker et al, 2009) …”

Section: Methodsmentioning

confidence: 99%

“…The seismicity of the plate contact is only incompletely recorded due to the limited station coverage by permanent and temporary networks. In this study, only south of eastern Crete is the plate contact resolved in detail by the dense temporary on-shore/off-shore LIBNET network (Becker et al, 2009). Other temporary networks covering western and central Crete located the seismogenic zone of the plate interface south of Crete with a lateral extent of 40-100 km and at 20-40 km depth .…”

Section: Observationsmentioning

confidence: 98%

“…In the regions of transtensional 138 F. Sodoudi et al: Receiver function images of the Hellenic subduction zone structures in the forearc that have been identified as nearly vertical margins of forearc slivers the seismicity extends down to the subduction interface (Meier et al, 2007;Becker et al, 2009;Brüstle et al, 2014). The seismicity of the plate contact is only incompletely recorded due to the limited station coverage by permanent and temporary networks.…”

Section: Observationsmentioning

confidence: 99%

“…5b), whereas the high seismicity occurs just above or below it. From profile 5 -where accurate locations of seismic events at the seismogenic interface are available (Becker et al, 2009) -it becomes evident that the plate contact between the serpentinized mantle and the subducting plate is mainly aseismic. Thus, the serpentinized mantle wedge is deforming mainly aseismically.…”

Section: Migrationmentioning

confidence: 99%

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Receiver function images of the Hellenic subduction zone and comparison to microseismicity

et al. 2015

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mentioning

confidence: 76%

Section: Methodsmentioning

confidence: 99%

Section: Observationsmentioning

confidence: 98%

Section: Observationsmentioning

confidence: 99%

Section: Migrationmentioning

confidence: 99%

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Receiver function images of the Hellenic subduction zone and comparison to microseismicity

et al. 2015

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Clusters of megaearthquakes on upper plate faults control the Eastern Mediterranean hazard

Mouslopoulou

Nicol

Begg

et al. 2015

Geophysical Research Letters

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The Hellenic subduction margin in the Eastern Mediterranean has generated devastating historical earthquakes and tsunamis with poorly known recurrence intervals. Here stranded paleoshorelines indicate strong uplift transients (0–7 mm/yr) along the island of Crete during the last ~50 kyr due to earthquake clustering. We identify the highest uplift rates in western Crete since the demise of the Minoan civilization and along the entire island between ~10 and 20 kyr B.P., with the absence of uplifted Late Holocene paleoshorelines in the east being due to seismic quiescence. Numerical models show that uplift along the Hellenic margin is primarily achieved by great earthquakes on major reverse faults in the upper plate with little contribution from plate‐interface slip. These earthquakes were strongly clustered with recurrence intervals ranging from hundreds to thousands of years and primarily being achieved by fault interactions. Future great earthquakes will rupture seismically quiet areas in eastern Crete, elevating both seismic and tsunami hazards.

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Present‐day crustal stress field in Greece inferred from regional‐scale damped inversion of earthquake focal mechanisms

et al. 2017

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In this study we utilize regional and teleseismic earthquake moment tensor solutions in order to infer the contemporary crustal stress in the Greek region. We focus on crustal earthquakes and select only solutions with good waveform fits and well‐resolved nodal planes. A data set of 1614 focal mechanisms is used as input to a regional‐scale damped stress inversion algorithm over a grid whose node spacing is 0.35°. Several resolution and sensitivity tests are performed in order to ascertain the robustness of our results. Our findings show that for most of the Greek region the largest principal stress σ1 is vertically oriented and that the minimum principal stress axis σ3 are subhorizontal with a predominant N‐S orientation. In the SW Peloponnese the orientation of σ3 axes rotates clockwise and in SE Aegean counterclockwise. These results are in agreement with the generally accepted model that slab rollback combined with gravitational spreading of the Aegean lithosphere are the main causes of the extension. Transitions between different faulting types in NW Greece or in the Aegean occur within narrow zones in the order of tens of kilometers. A visual comparison of the principal horizontal stress axes and the principal strain axes derived from GPS observations shows good agreement, suggesting that the crust in the Greek region behaves largely in an elastic manner.

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Seismicity at the convergent plate boundary offshore Crete, Greece, observed by an amphibian network

Cited by 37 publications

References 52 publications

Receiver function images of the Hellenic subduction zone and comparison to microseismicity

Receiver function images of the Hellenic subduction zone and comparison to microseismicity

Clusters of megaearthquakes on upper plate faults control the Eastern Mediterranean hazard

Present‐day crustal stress field in Greece inferred from regional‐scale damped inversion of earthquake focal mechanisms

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