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Authors: Carafa, M. M. C.* 
Barba, S.* 
Bird, P.* 
Title: Neotectonics and long-term seismicity in Europe and the Mediterranean region
Issue Date: 2015
Series/Report no.: 7/120 (2015)
DOI: 10.1002/2014JB011751
Keywords: Tectonics
Earthquake rates
Subject Classification04. Solid Earth::04.02. Exploration geophysics::04.02.03. Heat flow 
04. Solid Earth::04.03. Geodesy::04.03.01. Crustal deformations 
04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology 
04. Solid Earth::04.04. Geology::04.04.06. Rheology, friction, and structure of fault zones 
04. Solid Earth::04.06. Seismology::04.06.01. Earthquake faults: properties and evolution 
04. Solid Earth::04.06. Seismology::04.06.02. Earthquake interactions and probability 
04. Solid Earth::04.07. Tectonophysics::04.07.01. Continents 
04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics 
04. Solid Earth::04.07. Tectonophysics::04.07.04. Plate boundaries, motion, and tectonics 
04. Solid Earth::04.07. Tectonophysics::04.07.05. Stress 
04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonics 
Abstract: We present a neotectonic model of ongoing lithosphere deformation and a corresponding estimate of long-term shallow seismicity across the Africa-Eurasia plate boundary, including the eastern Atlantic, Mediterranean region, and continental Europe. GPS and stress data are absent or inadequate for the part of the study area covered by water. Thus, we opt for a dynamic model based on the stress-equilibrium equation; this approach allows us to estimate the long-term behavior of the lithosphere (given certain assumptions about its structure and physics) for both land and sea areas. We first update the existing plate model by adding five quasi-rigid plates (the Ionian Sea, Adria, Northern Greece, Central Greece, and Marmara) to constrain the deformation pattern of the study area. We use the most recent datasets to estimate the lithospheric structure. The models are evaluated in comparison with updated datasets of geodetic velocities and the most compressive horizontal principal stress azimuths. We find that the side and basal strengths drive the present-day motion of the Adria and Aegean Sea plates, whereas lithostatic pressure plays a key role in driving Anatolia. These findings provide new insights into the neotectonics of the greater Mediterranean region. Finally, the preferred model is used to estimate long-term shallow seismicity, which we retrospectively test against historical seismicity. As an alternative to reliance on incomplete geologic data or historical seismic catalogs, these neotectonic models help to forecast long-term seismicity, although requiring additional tuning before seismicity rates are used for seismic hazard purposes.
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File Description SizeFormat 
2014JB011751RR-Manuscript.pdfManuscript580.03 kBAdobe PDFView/Open
All_figures.pdfFigures10.48 MBAdobe PDFView/Open
2014JB011751RR-Supporting-Information_template.pdfSupporting Information File4.6 MBAdobe PDFView/Open
2014JB011751RR-ds01.txtSupporting Information File - Plate boundaries341.46 kBTextView/Open
2014JB011751RR-ds02.txtSupporting Information File - Grid817.98 kBTextView/Open
2014JB011751RR-ds03.txtSupporting Information File - Heat Flow390.26 kBTextView/Open
2014JB011751RR-ds04.txtSupporting Information File - Velocity Output242.5 kBTextView/Open
2014JB011751RR-ds05.txtSupporting Information File - Earthquake rates Mw>6247.53 kBTextView/Open
2014JB011751RR-ds06.txtSupporting Information File - Earthquake rates Mw>6.5247.53 kBTextView/Open
2014JB011751RR-ds07.txtSupporting Information File - Earthquake rates Mw>7247.53 kBTextView/Open
2014JB011751RR-ds08.txtSupporting Information File - Earthquake rates Mw>8247.53 kBTextView/Open
2014JB011751RR-ds09.txtSupporting Information File - Outline areas4.92 kBTextView/Open
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