using momentary
high-conductivity materials to estimate the hypocenter for earthquakes
in Taiwan. The concept stated above expresses that the
stress (or strain) caused by earthquakes should be related to
the earthquake magnitude and epicentral distance. The signal of
the stress (or strain) can be detected by groundwater variations.
Therefore, this study used a multivariable equation from an analytical
solution based on poroelastic theory to construct the model for
evaluating the extent of stress influence by using earthquake magnitude,
epicentral distance, and magnitude of groundwater level
variation. The extent of stress influence is defined as the distance
over which an earthquake can induce a step change of the groundwater
level