The Chandra X-ray Observatory (CXO) observed Jupiter during the period 24–26 February 2003 for ∼40 hours (4 Jupiter rotations), using both the spectroscopy array of the Advanced CCD Imaging Spectrometer (ACIS-S) and the imaging array of the High-Resolution Camera (HRC-I). Two ACIS-S exposures, each ∼8.5 hours long, were separated by an HRC-I exposure of ∼20 hours. The low- to middle-latitude nonauroral disk X-ray emission is much more spatially uniform than the auroral emission. However, the low- to middle-latitude X-ray count rate shows a small but statistically significant hour angle dependence and depends on surface magnetic field strength. In addition, the X-ray spectra from regions corresponding to 3–5 gauss and 5–7 gauss surface fields show significant differences in the energy band 1.26–1.38 keV, perhaps partly due to line emission occurring in the 3–5 gauss region but not the 5–7 gauss region. A similar correlation of surface magnetic field