Figure 2. (a) Stacked radial receiver functions with a
Gaussian value of 2.5 (~ 1.2 Hz). (b)~1.2 Hz CCP image for transect A-B. Note the clear lack
of a low velocity channel at the plate interface (Red = Positive, Blue =
Negative). For reference, earthquakes from the AACSE catalog (black
dots) and the slab depth of Hayes et al. (2018) are plotted as blue
dashes and inferred Moho surface (red dashes) assuming an 8-km thick
oceanic crust. (c) Stacked radial receiver functions with a
Gaussian value of 5.0 (~2.4 Hz). Stack1, Stack2 and
Stack3 show the locations of the receiver functions stacked and plotted
in Figure 4 to compare with synthetics. (d)~2.4 Hz CCP image for transect A-B. Note the clear lack
of a low velocity channel at the plate interface. For reference,
earthquakes from the AACSE catalog (black dots) and the slab depth of
Hayes et al. (2018) are plotted as blue dashes and inferred Moho surface
(red dashes) assuming an 8-km thick oceanic crust. Vertical exaggeration
= 0.135.