Authors: Felix N. Minta (UT- San Antonio, SwRI), George C. Ho (SwRi, UT- San Antonio), Heather A. Elliott (

We present a multi-diagnostic study of a band-splitting type II solar radio burst observed on 2025 December 04 with the Mingantu Ultrawide Spectral Radioheliograph (MUSER). The imaging analysis shows that lower-frequency band (LFB) and upper-frequency band (UFB) are separated by ~127.7 ± 47.7 Mm, suggesting that the sub lanes do not follow the simple upstream-downstream mechanism. The separation vector is dominated by the tangential component, with a mean offset of 169.3 arcsec compared with a radial offset of 11.2 arcsec. We also observed disturbances in LFB spanning 0.017 R_☉ (8,199 km), above a 1.5σ noise level due to perpendicular deflection of 86.2° ± 0.7° at a heliocentric height of 1.32 R_☉, suggesting a compact region with changes in density. The radial velocity decreases from ∼792 km/s before the deflection to ∼168 km/s after, consistent with localized magnetic structure in an inhomogeneous coronal environment. Overall, these measurements are consistent with a spatially offset and strongly non-radial source geometry and may reflect a curved shock flank or an inhomogeneous coronal environment.