Map shows stress transferred to beachballs by the magnitude-7.4 (left panel) and the magnitude-8.1 earthquakes (right panel). The orientation of each beachball provides information on the orientation of the fault (or fault section) to which the stress is transferred, and the direction of the potential slip if an earthquake is triggered. Color represents the amount of stress transferred. Inset shows the stress resolved on the future plane of the magnitude-8.1 caused by the magnitude-7.4 earthquake.