<Tr> <Th> Diameter </Th> <Td> 2,592 km (1,611 mi) </Td> </Tr> <Tr> <Th> Eponym </Th> <Td> Ocean of Storms </Td> </Tr> <P> Oceanus Procellarum (/ oʊ ˈsiːənəs ˌprɒsɪˈleɪrəm /; Latin for "Ocean of Storms") is a vast lunar mare on the western edge of the near side of the Moon . It is the only one of the lunar maria to be called an "Oceanus" (ocean), due to its size: Oceanus Procellarum is the largest of the maria, stretching more than 2,500 km (1,600 mi) across its north - south axis and covering roughly 4,000,000 km (1,500,000 sq mi). </P> <P> Like all lunar maria, Oceanus Procellarum was formed by ancient basaltic flood volcanic eruptions that covered the region in a thick, nearly flat layer of solidified magma . Unlike the other lunar maria, however, Oceanus Procellarum may or may not be contained within a single well - defined impact basin . Around its edges lie many minor bays and seas, including Mare Nubium and Mare Humorum to the south . To the northeast, Oceanus Procellarum is separated from Mare Imbrium by the Carpathian Mountains . On its north - west edge lies the 32 km wide Aristarchus ray crater, which is considered as the brightest feature on the Near side of the Moon . Also, the more - prominent ray - crater Copernicus lies within the eastern edge of the mare, distinctly with its bright ray materials sprawling over the darker material . On the northern edge of Oceanus Procellarum lies Sinus Roris . </P>

Where would you find the ocean of storms