EW₆₆₁₄ and E(BP–RP) as functions of distance for the Perseus, Taurus, Orion A, and Orion B regions. Gray dots represent stars with detected DIB λ6614. The red and cyan dashed curves show the fitted jumps using Eq. (4), with their central distances indicated in the legend of each subplot. The vertical blue dashed line marks the central distance of the jump, and the vertical orange dashed lines on either side outline the size of the cloud.