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Fig. 1 | Earth, Planets and Space

Fig. 1

From: Ultra-low velocity zone heterogeneities at the core–mantle boundary from diffracted PKKPab waves

Fig. 1

Raypaths for different PKKP branches. PKKPdf and PKKPbc raypaths are denoted as solid lines, and PKKPcd as well as PKKPab diffraction paths are denoted as thinner and thicker dashed lines, respectively. The ray paths are generated for an event (gray star) with a focal depth of 500 km, and the minor epicenter distance to the station (gray inverted triangle) is 95°. The diffracted portions along the core–mantle boundary on the two sides are about 9.0° in total. The inserted box shows one-sided diffraction of PKKPab waves along the CMB

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