  Sequences of aftershocks following Omori's empirical law are observed after
most major earthquakes, as well as in laboratory-scale fault-mimicking
experiments. Nevertheless, the origin of this memory effect is still unclear.
In this letter, we present an analytical framework for treating labquake and
earthquake catalogs on an equal footing. Using this analysis method, we show
that when memory is considered to be in deformation and not in time, all data
collapse onto a single master curve, showing that the timescale is entirely
fixed by the inverse of the strain rate.
