Fig. 5

Detrended space–time plot of the primary aftershocks. Epicenter locations and space–time plots of the detected aftershocks in the near-real-time PDE catalog (upper triangle array panels) and the ANSS catalog (lower triangle array panels) against transformed time for the period between the main shock and the M7.3 event. The respective transformed times are obtained using the Omori–Utsu function that is fitted their detected aftershock data throughout the entire period from the main shock until the M7.3 event. Epicenters of the located aftershocks (top left panel and bottom right panel), epicenter latitude against transformed time (top right panel and bottom left panel), and transformed time against epicenter longitude (middle row panels). The sizes of the circles indicate the magnitude. The large circles mark the epicenters of the M7.8 main shock, the M7.3 largest aftershock, and the M6.7 aftershock of April 26, 2015