Skip to main content
Fig. 4 | Earth, Planets and Space

Fig. 4

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

Fig. 4

a Models used in synthetic tests of RMT. Compared to PREM (gray line), the test model (black line) has either a P-wave velocity decrease from 0 to 8% (low velocity model) or an increase from 0 to 6% (high-velocity model) in a 60-km layer atop the CMB. b Synthetic seismograms calculated using DSM for a 500-km-depth event based on the low velocity model in a. The seismograms are band-pass filtered with the same frequency band as the observed data. The black lines denote the travel times of PKKPbc and PKKPab diffraction waves, respectively. c Radon transform image of synthetic seismograms in b. The normalized amplitudes (shown in different color) are energy of seismogram summations along their corresponding ray parameters

Back to article page