Arctic Ocean gas reserves, and the Chukchi shelf forms the border between Russian and the United States as stated in the USSR–USA Maritime Boundary Agreement. The whole area is subject to international territorial claims. An underwater ridge, the Lomonosov Ridge, divides the deep sea North Polar Basin into two oceanic basins: the Eurasian Basin, which is between deep, and the Amerasian Basin (sometimes called the North American, or Hyperborean Basin), which is about deep. The bathymetry of the ocean bottom is marked by fault block ridges, abyssal plains, ocean deeps, and basins. The average depth of the Arctic Ocean is . The
Timeline of the 2008 North Indian Ocean cyclone season depressions, 4 Cyclonic storms and 1 Severe Cyclonic storm formed. The scope of this basin is north of the Equator and west of the Malaysian Peninsula. The India Meteorological Department (IMD) and Joint Typhoon Warning Center (JTWC) monitor tropical cyclones in this basin. This basin is divided into two different seas by the IMD; the Arabian Sea to the west of India, which is abbreviated as ARB by the IMD, and the Bay of Bengal to the east of India, which is abbreviated as BOB by the IMD. Timeline of the 2008 North Indian Ocean cyclone season The 2008 North