Amniphon was a Federation colony world located near the Federation-Cardassian border in the Demilitarized Zone. In early 2371, a massive rockslide suspected to have been triggered by Cardassian agents caused thousands of casualties and the destruction of much of the planet's computerized records.
When Starfleet Lieutenant Tuvok began his undercover infiltration into Maquis, his records were altered to indicate he and his family had moved to Amniphon in 2368, and that his mate and their children were killed in this tragedy. (Star Trek novel: The Brave and the Bold)
Logan Celes lived on Amniphon in the 2380s. (Star Trek: Pendragon, Star Trek: Sons of Liberty)