Jet value of detected structures against the angular deviation from the direction of movement of Io projected into the plane perpendicular to the local magnetic field at Io. Angles greater than 0° indicate an anti-Jovian direction, whereas angles smaller than 0° indicate a Jovian direction (inside the orbit of Io). Cases marked with a “b” are those for which the structure is well aligned with the expected direction of the banana. Dashed lines indicating the expected orientation of an exactly anti-Jovian (+90°) and Jovian (−90°) structure have been included to guide the eye. Annotation has been applied below those cases displayed in Fig. 5.