  We introduce the first fully self-consistent model combining the seismic
micro-ruptures occurring within a generalized Burridge-Knopoff spring-block
model with the nucleation and propagation of electric charge pulses within a
coupled mechano-electrokinetic system. This model provides a general
theoretical framework for modeling and analyzing geoelectric precursors to
earthquakes. In particular, it can reproduce the unipolar pulses that have
often been reported before large seismic events, as well as various observed
anomalies in the statistical moments of the ambient electric fields and the
power-law exponent transition of the power spectra of electric fields.
