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| Titel |
1D crustal structure from quality seismological data for the Cyprus subduction zone |
| VerfasserIn |
Şükran Perk, Ali Değer Özbakır, Hayrullah Karabulut |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250072025
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| Zusammenfassung |
| The eastern Mediterranean is a tectonically complex region, where long-term subduction and
accretion processes have shaped the overall evolution. Recently, many seismic tomography
studies have shown subducted slabs of the Neo-Tethyan lithosphere, continuing its
subduction in the Hellenic trench, stalled in the Cyprus trench and being torn near the
intersection between them. Antalya bay is a key region located on the western flank of the
Cyprus Subduction Zone (CSZ), close to the junction between the Hellenic and Cyprus Arcs.
Here deep earthquakes are nucleated, which otherwise cannot be seen anywhere else along
the CSZ. For this reason, we focus our attention specifically to the Antalya Bay area but also
the remaining parts of the CSZ. Several regional studies have been carried out to
define the velocity structure beneath the region but none have been able to locate
the CSZ. One of the main reasons for this was the lack of incorporation of a wide
seismic network in those regional studies. We compile a large catalog of seismicity
and relocate earthquakes to infer 1D local crustal structure using the clusters of
seismicity.
We used seismic data between 2005 – 2011 which are recorded at more than
335 seismic stations operated by several agencies and portable deployments. The
data-set is composed of over 10,000 events and earthquakes can be grouped in
several distinct clusters. We defined five of these clusters, where the total number of
events is more than 4500, among which we selected over 2000 events with the
highest data quality. 1-D local P-wave velocity models are developed using this
high quality data-set and the earthquakes are relocated using the local velocity
models.
The compiled and reanalyzed data will contribute to perform local earthquake
tomography. Moreover, obtained local velocity models represent a fundamental step towards
an improved seismic tomography studies in a very crucial region in the eastern
Mediterranean. |
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