sentence: For the first hour (UTC 10:00–10:59), this phenomenon affects inhabited territories, whereas during the second hour (UTC 11:00–11:59) it only affects an uninhabited maritime time zone twelve hours behind UTC.
modified: fix grammar: For the first hour (UTC 10:00–10:59), this phenomenon affect inhabit territories, whereas during the second hour (UTC 11:00–11:59) it only affect an uninhabited maritime time zone twelve hours behind UTC.