Panels (a)–(h) follow the same format as Figure 1, but for the IP shock observed by SolO on 2022 March 8 at 14:45:54 UT. Panel (i) shows a 1-minute pre-shock zoom, indicating high-frequency whistlers near 2 Hz lasting ∼30 s. Panel (j) shows the PSD of the magnetic field trace and magnitude for the upstream 5-minute interval, revealing two peaks: a higher-frequency narrowband enhancement near 2 Hz, and a lower-frequency broadband enhancement near the proton cyclotron frequency.