90 Degrees East, also known as 90°E Lake, is a lake in Antarctica. With a surface area of about 2,000 square kilometres (770 sq mi), it is the second-largest known subglacial lake in Antarctica, after Lake Vostok. 90 Degrees East was discovered in January 2006, along with Sovetskaya.[1] It is named after the 90th meridian east, on which it lies.