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A comparison of tiltmeters at tidal frequencies
Author(s) -
Wyatt F.,
Cabaniss G.,
Agnew D. C.
Publication year - 1982
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl009i007p00743
Subject(s) - tiltmeter , borehole , geology , observatory , seismology , geodesy , noise (video) , geophysics , geotechnical engineering , physics , amplitude , artificial intelligence , astrophysics , computer science , image (mathematics) , quantum mechanics
Different techniques for measuring crustal deformation are now being tested at Piñon Flat Geophysical Observatory in southern California. As a part of this comparison, we have analyzed five months of data from four different tiltmeters: three borehole instruments, two 4.5 m and one 26 m deep; and a long‐base (535 m) instrument at the surface. For periods from 1 hour to 10 days, the signals from the deep borehole and long‐base instruments show comparable noise levels; the shallow instruments are much noisier. Tidal analyses give results for the different sensors which agree to within the errors, which are several percent.