Borehole Tilt Results from Charlevoix, Quebec

Abstract

Results from the analysis of recordings from the Charlevoix borehole tilt experiment are presented and discussed. Time variations in the tilt tidal admittance are shown to be related to the time variations in the marine loading from the nearby St. Lawrence estuary. Most of the variability in the sub-tidal tilts is associated with groundwater fluctuations at the Charlevoix site, the residual drift rates varying between 0.01 and 1.0 microrad/yr depending on the tiltmeter. The detectability of coherent regional signals is 2 microrad/yr in the south direction and 0.25 microrad/yr in the east.

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Document Details

Document Type
Technical Report
Publication Date
Apr 23, 1987
Accession Number
ADA205824

Entities

People

  • Christopher Beaumont
  • J. K. L. Peters
  • Jochen Kumpel

Organizations

  • Dalhousie University

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Air Force
  • Amplitude
  • Boreholes
  • California
  • Classification
  • Earth Tides
  • Frequency Domain
  • Geophysics
  • Groundwater
  • Identification
  • Measurement
  • Monitoring
  • Recognition
  • Regression Analysis
  • Security
  • United States
  • Universities

Fields of Study

  • Environmental science

Readers

  • Coastal Oceanography
  • Seismology