Recovering locations and takeoff angles of earthquakes in clusters based on the difference in their S-P intervals
It is demonstrated in [Gnyp & Malytskyy, 2023] that only the difference in the intervals between the first P- and S-waves can be used to relocate a cluster of similar earthquakes. The advantage of using only the difference is that it is measured by cross-correlation within a window containing the corresponding arrivals, eliminating the need to know their exact timing. Another advantage is that relative locations can be recovered regardless of source times and, therefore, of often inaccurate arrival picks or velocity models.