Open Access3D monitoring of movements along West Pirin Fault
Author(s) -
Nikolai Dobrev,
Petko M. Ivanov,
V. Nikolov
Publication year - 2018
Publication title -
inženerna geologiâ i hidrogeologiâ
Language(s) - English
Resource type - Journals
eISSN - 2738-6996
pISSN - 0204-7934
DOI - 10.52321/igh.32.1.39
Subject(s) - extensometer , seismology , geology , geodesy , fault (geology) , slip (aerodynamics) , compression (physics) , strike slip tectonics , engineering , structural engineering , materials science , aerospace engineering , composite material
This article presents the initial results of the 3D monitoring of West Pirin Fault in the area of the village of Brezhani, SW Bulgaria. The monitoring equipment – extensometer TM71 was installed in August 2013. The data obtained from the observations until November 2018 were processed. The results show 5 stages in the dynamics of this part of the fault. One of them is associated with a coseismic effect (sharp movements) resulted from a local weak seismic event.The obtained results show that Y-axis movements are most stable, representing right-lateral strike-slip movements with a high correlation of data (coefficient of determination r2=0.866). The most active movements have been established during the last 2 years of the observations. In 2017-2018, the established rate of right-lateral strike-slip (Y axis) is 0.84 mm/a. For whole observation period the results show compression od fault zone 0.07 mm/a, right-lateral strike-slip 0.61 mm/a and reverse movements 0.09 mm/a. These results give us reason to suppose a recent activity along West Pirin Fault.