Extended Data Fig. 2: Observations of SKKKP and its B-caustic diffractions.
From: Detections of ultralow velocity zones in high-velocity lowermost mantle linked to subducted slabs
a-c, Record sections display vertical component seismograms in the frequency band 0.5–1.2 Hz for three deep-focus events. a, The 20130514 event, magnitude Mb 6.2, depth 611.7 km. b, The 20131001 event, magnitude Mb 6.3, depth 578.4 km. c, The 20140721 event, magnitude Mb 6.4, depth 614.0 km. The dashed blue lines show the theoretical travel time curves of SKKKP and its B-caustic diffractions calculated with the AK135 model using a constant slowness of –4.37 s per deg. The maps above the record sections show the locations of events (orange stars) and stations (grey triangles).
