Evidence of a plate-wide tectonic pressure pulse provided by extensometric monitoring in the Balkan Mountains (Bulgaria)

0451040 - ÚSMH 2016 RIV SK eng J - Journal Article
Briestenský, Miloš - Rowberry, Matthew David - Stemberk, Josef - Stefanov, P. - Vozár, J. - Šebela, S. - Petro, L. - Bella, P. - Gaal, L. - Ormukov, Ch.
Evidence of a plate-wide tectonic pressure pulse provided by extensometric monitoring in the Balkan Mountains (Bulgaria).
Geologica Carpathica. Roč. 66, č. 5 (2015), s. 427-438. ISSN 1335-0552. E-ISSN 1336-8052
R&D Projects: GA MŠMT LM2010008; GA MŠMT OC 625.10; GA ČR GA205/05/2770; GA ČR GA205/06/1828; GA ČR GA205/09/2024
Institutional support: RVO:67985891
Keywords : Eurasian Plate * Balkan Peninsula * active tectonics research * aseismic transient deformations * slow-slip phenomena
Subject RIV: DC - Siesmology, Volcanology, Earth Structure
Impact factor: 1.523, year: 2015
http://www.geologicacarpathica.com/browse-journal/volumes/66-5/article-780

The EU-TecNet monitoring network uses customised three-dimensional extensometers to record transient deformations across individual faults. This paper presents the first results from two newly established monitoring points in the Balkan Mountains in Bulgaria. The data from Saeva Dupka, recorded across an EEN-WWS striking fault, show sinistral strike-slip along the fault and subsidence of the southern block. Much of the subsidence occurred around the time of the distal MW = 5.6 Pernik Earthquake. An important transient deformation event, which began in autumn 2012, was reflected by significant compression and subsequent extension across the monitored fault. The data from Bacho Kiro, recorded across a NE-SW striking fault, show sinistral strike-slip along the fault and subsidence of the northwestern block. The same important deformation event was reflected by changes in the strike-slip, dip-slip, and horizontal opening/closing trends. These results have been compared to data from other monitoring points in the Western Carpathians, External Dinarides, and Tian Shan. Many of the sites evidence simultaneous displacement anomalies and this observation is interpreted to reflect the widespread propagation of a tectonic pressure pulse towards the end of 2012.
Permanent Link: http://hdl.handle.net/11104/0252244