Active tectonic fault microdisplacement analyses : a comparison of results from surface and underground monitoring in western Slovakia.

Autor:	Briestenský, Miloš
Další autoři:	Košťák, Blahoslav Stemberk, Josef Petro, Ľubomír Vozár, Jozef, 1939- Fojtíková, Lucia
Jazyk:	angličtina
Předmět:	zemětřesení jeskyně tenzometrie earthquake caves extensometry články journal articles active faulting microdisplacements rock massif dilation
Druh dokumentu:	Non-fiction
ISSN:	1214-9705
Abstrakt:	Abstract: This paper examines the results of fault microdisplacement analyses obtained from sites located both at the surface and underground in western Slovakia. The results of surface monitoring showed significant annual climatic effects on the various displacement components. In contrast, the results of underground monitoring in caves showed minimal climatic effects. It is seen that the influence of climate decreases markedly with depth. The yearly peak-to-peak amplitude of climatic variations may be as high as 1 mm at the surface but only 0.1 mm underground. The amount of tectonic displacement can be determined once such climatic considerations have been taken into account. Our fault displacement measurements show horizontal strike-slip rates of tenths of mm or hundredths of mm per year. In addition, vertical displacements have been recorded at Prekážka Quarry, Driny Cave, and Slopy Cave. The network is sufficiently dense to identify changes in displacement activity recorded during recent, significant, earthquake events. Furthermore, three gauges have also helped to determine the local stress orientation in Driny Cave.
Databáze:	Katalog Knihovny AV ČR
Externí odkaz:	Plný text