A first modeling of dynamic and static crustal strain field from near-field dilatation measurements: example of the 2013 6.2 Ruisui earthquake, Taiwan

We analyze the high-resolution dilatation data for the October 2013 6.2 Ruisui, Taiwan, earthquake, which occurred at a distance of 15-20 km away from a Sacks-Evertson dilatometer network. Based on well-constrained source parameters (, , ), we propose a simple rupture model that explains the permanent static deformation and the dynamic vibrations at short period (3.5-4.5 s) for most of the four sites with less than 20 % of discrepancies. This study represents a first attempt of modeling simultaneously the dynamic and static crustal strain using dilatation data. The results illustrate the potential for strain recordings of high-frequency seismic waves in the near-field of an earthquake to add constraints on the properties of seismic sources.