There are several dozens of islands with the total area of , mostly in the western part of the sea and in the river deltas. Storms and currents due to the ice thawing significantly erode the islands, so the Semenovsky and Vasilievsky islands (74°12"N, 133°E) which were discovered in 1815 have already disappeared. The most significant groups of islands are Severnaya Zemlya, Komsomolskaya Pravda, Vilkitsky and Faddey, and the largest individual islands are Bolshoy Begichev (1764 km2), Belkovsky (500 km2), Maly Taymyr (250 km2), Stolbovoy (170 km2), Starokadomsky (110 km2), and Peschanyy (17 km2). (see Islands of the Laptev Sea)