『Abstract
　Water level fluctuations induced by tidal strains can be analyzed to estimate the elastic properties, porosity, and transmissivity of the surrounding aquifer materials. We review underutilized methods for estimating aquifer properties from the confined response to earth tides. The earth tide analyses are applied to an open well penetrating a confined carbonate aquifer. The resulting range of elastic and hydraulic aquifer properties are in general agreement with that determined by other investigators for the area of the well. The analyses indicate that passive monitoring data from wells completed in sufficiently stiff, low porosity formation can provide useful information on the properties of the surrounding formation.』

Introduction
Well BLM-1
Application
　Estimating specific storage from the theoretical tidal potential
　Estimating porosity from barometric effects
　Estimating specific storage and porosity from areal tidal strain
　Estimating transmissivity
Discussion
Conclusion
Acknowledgments
Notations
References