Examples of discontinuity events during 2022. The discontinuity was apparent on the nightside lower clouds with 2.26 μm images from IRTF/SpeX taken on February 4, and at the dayside middle clouds as observed in images by amateur observers taken with filters covering wavelengths 700–900 nm from May to July 2022. During June 14, Akatsuki/UVI images at 365 nm suggest that the discontinuity was propagating simultaneously at the upper and middle clouds (last image in upper row). All the images were high-pass filtered to enhance cloud details.