Extended Data Fig. 10: Migrated synthetic receiver function results.
From: Seismic imaging of a basaltic Lesser Antilles slab from ancient tectonics

Migrated synthetic receiver function results for the LBA case using records from six synthetic seismic events, three angles from the left and three from the right (a), and 14 synthetic events, seven angles from the left and seven from the right (b). The Gt-transition-associated discontinuity, the positive phase below the 660-km discontinuity near the slab, is evident in both results. This suggests that, although the synthetic result with extra events presents a cleaner image, the result based on the six synthetic events remains robust enough for studying the behaviour of the 660-km discontinuity.