Open AccessTidal Strain Enhancement Observed Across a Tunnel
Author(s) -
Itsueli U. J.,
Bilham R. G.,
Goulty N. R.,
King G. C. P.
Publication year - 1975
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1975.tb05878.x
Subject(s) - strain (injury) , noise (video) , seismology , signal (programming language) , geology , medicine , anatomy , artificial intelligence , computer science , image (mathematics) , programming language
Summary Geophysical strainmeters are commonly installed in underground cavities. These cavities can cause considerable modification to the local strain field. Instruments have been installed in Queensbury tunnel, Yorkshire to examine this effect, and there is a good agreement between the predicted effect of a cavity and the observed data. Strainmeters installed across the tunnel show an amplification of the strain tides of slightly more than a factor of three due to the cavity effect, but the noise level is not increased to the same extent. This suggests that the cavity effect may prove a useful means of improving signal to noise ratios for studying low level strain signals.