Chatham Standard Time Zone Chatham Standard Time Zone The Chatham Standard Time Zone is a geographic region that keeps time by adding twelve hours and forty-five minutes to Coordinated Universal Time (UTC) resulting in . The Chatham Standard Time Zone is used exclusively in the Chatham Islands, New Zealand, located in the South Pacific Ocean at 43°53′54″S, 176°31′44″W. It is one of only three time zones with a 45-minute offset from UTC, the others being Nepal Time () and the unofficial Australian Central Western Time (). During summer daylight saving time is observed and clocks are advanced one hour. Chatham Daylight Time (CHADT) is
Aleutian subduction zone Aleutian subduction zone The Aleutian subduction zone is a ~2500 mile-long convergence boundary between the North American Plate and the Pacific Plate, that extends from the Alaska Range to the Kamchatka Peninsula. Here, the Pacific Plate is being subducted underneath the North American plate and the rate of subduction changes from west to east from 7.5 cm/yr to 5.1 cm/yr. The Aleutian subduction zone includes two prominent features, the Aleutian arc and the Aleutian trench. The island arc was created via volcanic eruptions from dehydration of the subducting slab at ~100 km depth. The trench is a narrow and deep