Figure 2
From: Combining stress transfer and source directivity: the case of the 2012 Emilia seismic sequence
Maps of dominant rupture direction.
Overview of inferences obtained from the inversion of the peak-ground velocities for the main triggering events (black stars) considered in this study. In each panel, the dominant rupture directions (red arrows) and aftershock distributions (gray stars) up-to the next main event in the sequence (green stars), are shown. The orange arrow indicates the secondary rupture direction and its length depends on the ratio between the Pdf at the secondary maximum and the value at the absolute maximum (supplementary Figure S2). The uncertainties of the rupture directions are given in Table 1. The blue arrows indicate strike directions of the principal and auxiliary fault planes deduced from the corresponding focal mechanism3. The black triangles identify the stations at which PGVs data were available. In each panel the origin time and magnitude of the triggering event are specified, as well as the best value of the Mach number α and the available number of PGV data used. The figure was generated by using the Generic Mapping Tools (http://gmt.soest.hawaii.edu/)35.
