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Authors: Carafa, M. M. C.*
Barba, S.*
Title: The stress field in Europe: optimal orientations with confidence limits
Other Titles: Stress in Europe with confidence limits
Title of journal: Geophysical Journal International
Publisher: Wiley-Blackwell
Issue Date: 2013
DOI: 10.1093/gji/ggt024
Keywords: Neotectonics
Seismicity and tectonics
Fractures and faults
Intra-plate processes
Plate motions
Dynamics: gravity and tectonics
Abstract: In this study, we modify and extend a data analysis technique to determine the stress orientations between data clusters by adding an additional constraint governing the probability algorithm. We apply this technique to produce a map of the maximum horizontal compressive stress (S_Hmax) orientations in the greater European region (including Europe, Turkey and Mediterranean Africa). Using the World Stress Map dataset release 2008, we obtain analytical probability distributions of the directional differences as a function of the angular distance, θ. We then multiply the probability distributions that are based on pre-averaged data within θ<3° of the interpolation point and determine the maximum likelihood estimate of the S_Hmax orientation. At a given distance, the probability of obtaining a particular discrepancy decreases exponentially with discrepancy. By exploiting this feature observed in the World Stress Map release 2008 dataset, we increase the robustness of our S_Hmax determinations. For a reliable determination of the most likely S_Hmax orientation, we require that 90% confidence limits be less than ±60° and a minimum of three clusters, which is achieved for 57% of the study area, with small uncertainties of less than ±10° for 7% of the area. When the data density exceeds 0.8×10^-3 data/km2, our method provides a means of reproducing significant local patterns in the stress field. Several mountain ranges in the Mediterranean display 90° changes in the S_Hmax orientation from their crests (which often experience normal faulting) and their foothills (which often experience thrust faulting). This pattern constrains the tectonic stresses to a magnitude similar to that of the topographic stresses.
Description: This article has been accepted for publication in Geophysical Journal International ©: The Authors 2003. Published by Oxford University Press on behalf of The Royal Astronomical Society. All rights reserved.
Appears in Collections:04.04.09. Structural geology
04.07.05. Stress
05.02.99. General or miscellaneous
04.03.01. Crustal deformations
Papers Published / Papers in press

Files in This Item:

File Description SizeFormatVisibility
Geophys. J. Int.-2013-Carafa-Barba_dowloadable.pdfMain article - downloadable final draft3.25 MBAdobe PDFView/Open
Geophys. J. Int.-2013-Carafa-Barba_publisher_pdf.pdfMain article - publisher pdf (restricted access)9.11 MBAdobe PDFView/Open
readme_supplementary_files.txtSupplementary files - readme1.88 kBTextView/Open
Figure_S1.pdfSupplementary files - Figure S1555.89 kBAdobe PDFView/Open
Table_S1.zipSupplementary files - Table S1 (csv zip)743.69 kBZIPView/Open
Table_S1.csv.gzSupplementary files - Table S1 (csv gz)743.57 kBgzipView/Open
CarafaBarba_ggt024_SupplementaryFiles.zipSupplementary files - Figure S1 and Table S12 MBZIPView/Open
CarafaBarba_ggt024_kmz_GoogleEarth.zipSupplementary files - Google Earth kmz2.51 MBkmz (Google Earth)View/Open
CarafaBarba_ggt024_mapinfo.zipSupplementary files - Mapinfo9.94 MBMapinfoView/Open
CarafaBarba_ggt024_Autocad-DXF.zipSupplementary files - Autocad DXF3.94 MBAutocad DXFView/Open
CarafaBarba_ggt024_mif-mid.zipSupplementary files - Mapinfo (mif mid)4.26 MBMapinfo (mif mid)View/Open
CarafaBarba_ggt024_ESRI-shp.zipSupplementary files - Esri Arcgis8.59 MBSHP (ESRI Arcgis)View/Open

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