  Slow-slip phenomena, including afterslips and silent earthquakes, are studied
using a one-dimensional Burridge--Knopoff model that obeys the rate-and-state
dependent friction law. By varying only a few model parameters, this simple
model allows reproducing a variety of seismic slips within a single framework,
including main shocks, precursory nucleation processes, afterslips, and silent
earthquakes.
