Articles | Volume 12, issue 1
Nonlin. Processes Geophys., 12, 83–88, 2005
https://doi.org/10.5194/npg-12-83-2005

Special issue: Seismicity pattern dynamics

Nonlin. Processes Geophys., 12, 83–88, 2005
https://doi.org/10.5194/npg-12-83-2005

  25 Jan 2005

25 Jan 2005

On the separation of timescales in spring-block earthquake models

S. Hergarten and F. Jansen S. Hergarten and F. Jansen
  • Institute of Geology, University of Bonn, Germany

Abstract. One of the most widespread spring-block earthquake models, the Olami-Feder-Christensen model, is investigated without making the assumption that the duration of individual earthquakes is negligible. While the Gutenberg-Richter law for the size distribution of earthquakes is preserved qualitatively for earthquakes of finite duration, the b-value decreases with increasing earthquake duration. The effect decreases with increasing lattice size, although it is not clear whether it completely vanishes in the limit of infinite grid size. For realistic values of earthquake duration, the effect is negligible, so that the original model with zero earthquake duration is appropriate for most applications.