The gravity signal contains information regarding changes in density at all depths and
can be used as a proxy for the strain accumulation in fault networks. A stress evolution
time-dependent model was used to create simulated slip histories over the San Andreas
Fault network in California. Using a linear sum of the gravity signals from each fault
segment in the model, via coseismic gravity Green's functions, a time-dependent gravity
model was created. The steady state gravity from the long-term plate motion generates
a signal over 5 years with magnitudes of ±~2 μGal; the current limit of portable
instrument observations. Moderate to large events generate signal magnitudes in the
range of ~10 to ~80 μGal, well within the range of ground-based observations. The
complex fault network geometry of California significantly affects the spatial extent of the
gravity signal from the three events studied.Peer reviewe