In March 2009, structures resembling lava flows were announced in a region of Titan called Hotei Arcus, which appears to fluctuate in brightness over several months.
Pada Maret 2009, struktur yang mirip dengan aliran lava diumumkan ditemukan di wilayah yang disebut Hotei Arcus, yang berfluktuasi kecerahannya selama beberapa bulan.