Extended Data Fig. 5: Map and SEM model set-up for testing the effects of slab structure anomalies.
From: Detections of ultralow velocity zones in high-velocity lowermost mantle linked to subducted slabs
a, The large map shows the locations of the 20070716 event (Mb 6.2, depth 358.2 km, orange star), real stations (grey triangles) and added stations (light-yellow triangles) that were used for the synthetic test. The red lines represent the epicentral distance contours. The small map displays the magnified area of the blue box in the large map. The solid black lines represent the depth contours of the slab. b, The cross-shaped slice (A-A′, B-B′, C-C′ and D-D′ in a) of the 6° (longitude) × 6° (latitude) × 670 km (depth) SEM box (the dashed black box in a). c-e, The depth profiles of P-wave velocity along the slab downdip direction (A-A′ in a). The slab has a thickness of 120 km and the black lines in c-e show the velocity anomaly of the slab. The inset in c shows the location of earthquakes at different depths in synthetic tests that use the same OC LVZ model.
