// Workers AI · dad joke modeWhat did Supply Reef say to the ship? "Reef-uel here

Supply Reef
Location within Northern Mariana Islands Location within North Pacific
Summit depth	−8 m (−26 ft)
Location
Location	Northern Mariana Islands
Coordinates	20°08′N 145°6′E
Country	United States
Geology
Type	Submarine volcano
Last eruption	September to December 1989

Supply Reef is a submerged circular reef of volcanic origin in the Northern Mariana Islands chain, about 10 kilometres (6 mi) NW of the Maug Islands. Presently, this igneous seamount is roughly 8 metres (26 ft) below the ocean's surface and about 100 m (300 ft) in diameter. Apparent episodes of submarine volcanism were noted on December 22–24 and 26–27 in 1989.

Volcanic and seismic activity has been noted, as well as hard and soft corals.

Map including Supply Reef (labeled as 'reef') (DMA, 1983)

References

• "Supply Reef". Global Volcanism Program. Smithsonian Institution. Retrieved 2017-03-03.