It is located 150 km southwest of the main island of Pohnpei in the Eastern Caroline Islands and consists of 10 individual islands on the reef. The largest and only inhabited island is Ngatik, at the western end.
The atoll is 22.5 km long and up to 9.6 km wide. The lagoon measures 78.56 km² in area, and the total area is 114 km². The aggregate land area of the 10 islands is 1.75 km², of which the main island Ngatik is 0.91 km², or more than half. While Ngatik is the only inhabited island, the six larger of the remaining islands are used by the population for harvesting coconuts and growing taro, and animal husbandry (pigs and chicken). There is a total of 12 buildings for temporary shelter on those islands.
The islands clockwise, starting at Ngatik in the west:
|Pikepe (Piken Mategan)||0.009||east|
|Sapwuahfik (Atoll)||1.551||fringing reef|
The local creole, Ngatik Men's Creole, developed as a result of the 1837 Ngatik massacre, during which the island's male population was wiped out by the crew of Australian captain C.H. Hart and Pohnpeian warriors. Some of the Europeans and Pohnpeians settled and repopulated the island, taking the local women as wives. The island formed a new culture and language, a mixture of English and the Sapwuahfik dialect of Ponapean. In addition to the creole, which is only spoken by men, all of the residents speak Ngatikese, a Ponapeic language closely related to the Pohnpeian language.
The atoll was first discovered by Westerners on 6 April 1773 by the Spanish naval officer Felipe Tompson when sailing from Manila to San Blas in New Spain on board of the vessel Nuestra Señora de la Consolación also called in short Buen Fin. Tompson charted the island as Los Valientes (the island of the bold in Spanish).
- Kitti (municipality)
- U, Pohnpei
- Poyer, Lin (1990). "6. Being Sapwuahfik: Cultural and Ethnic Identity in a Micronesian Society". In Jocelyn Linnekin, Lin Poyer. Cultural Identity and Ethnicity in the Pacific. University of Hawaii Press. p. 127. ISBN 0824818911. Retrieved 2012-12-15.
- Donald W. Buden: The Reptiles of Sapwuahfik Atoll, Federated States of Micronesia
- Poyer, Lin (1993). The Ngatik massacre: history and identity on a Micronesian atoll. Smithsonian Institution Press. pp. 1–3, 146. ISBN 1560982624. Retrieved 2012-12-15.
- Riesenberg, Saul H. "Six Pacific island discoveries" The American neptune Vol. 34; Salem, Mass. 1974, p.250
- Sapwuahfik - Oceandots at the Wayback Machine (archived December 23, 2010)
- Deutsches Koloniallexikon (German)
- Statoids.com, retrieved December 8, 2010
- POHNPEI (Islas Carolinas orientales). 3º parte. (Spanish)