In October 1981, the Office of Outer Continental Shelf Information(OCSI) of the U.S. Geological Survey (USGS) published the initial summary report for the Arctic subregion of Alaska, the Arctic Summary Report, October 1981 (Jackson and others, USGS Open-File Report 81-621). This report is the first update to the initial report. Updates are published approximately every 6 months in order to provide additional and revised information. A revised summary report is published only when a new Outer Continental Shelf (OCS) lease sale is held or if a commercial discovery is announced on the OCS in that region.