The wall imprint of outer-layer motions in wall turbulence is inherently intermittent, yet most attached-eddy coherence analyses are ensemble averaged. Here we develop a time-resolved coherence framework to track the intermittent wall imprint of logarithmic-region motions, using the near-wall velocity record as an operational wall-signature proxy. The method diagnoses scale-local linear common variance between the near-wall and logarithmic-region velocity records; it does not identify individual eddy boundaries or imply a one-to-one geometrical correspondence between motions at the two heights. Synchronized two-point hot-wire measurements in a high-Reynolds-number, nominally zero-pressure-gradient turbulent boundary layer are analyzed (E2-type Melbourne dataset), with a near-wall reference $u(z_R,t)$ and a logarithmic-region signal $u(z,t)$. A time-varying squared linear coherence ${\gamma }_L^2(t,f)$ is obtained from wavelet coherence. Upon averaging, the wavelet estimator reproduces the classical coherence behavior: ${\langle {\gamma }_L^2\rangle }_t$ matches short-time Fourier estimates over the energetic band and collapses with established similarity trends when expressed versus ${\lambda }_x/\mathrm{\Delta }z$. To summarize event persistence, we define a critical streamwise scale ${\lambda }_s\left(t\right)$ from the first down-crossing of a windowed autocorrelation of the large-scale component of $u(z,t)$. Across heights, $\overline{{\lambda }_s}\left(z\right)/\delta$ increases, while ${\gamma }_L^2({\lambda }_s\left(t\right),t)$ decreases within the logarithmic region, consistent with a weakening wall imprint with wall-normal separation. We then couple ${\gamma }_L^2(t,f)$ to a third-order-increment energy-flux surrogate $\mathrm{\Pi }({\lambda }_x/\delta ,t)$ to form coherence-conditioned cascade measures. Conditioning on a strong wall imprint yields a systematic wall-normal dependence: The high-coherence conditional flux weakens with increasing $z/\delta$ for ${\lambda }_x/\delta \lesssim O\left(1\right)$ and approaches zero at the largest scales. Finally, collocated wavelet energy-coherence statistics quantify how outer-layer energy is redistributed across coherence levels and reveal a peak in high-coherence conditional mean energy within the logarithmic region.

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• Boundary layers
• Intermittency
• Shear layer turbulence
• Turbulent boundary layers