Eifuku

Eifuku
Bathymetic image of NW Eifuku as viewed to the northeast
Location
Coordinates	21°29′06″N 144°02′35″E / 21.485°N 144.043°E / 21.485; 144.043[1]

Eifuku (Japanese: 永福) and NW Eifuku (北西永福) are two seamounts in the Pacific Ocean. The better known one is NW Eifuku, where an unusual hydrothermal vent called "Champagne" produced droplets of liquid CO
₂. Both seamounts are located in the Northern Marianas and are volcanoes, part of the Izu-Bonin-Mariana Arc. NW Eifuku rises to 1,535 metres (5,036 ft) depth below sea level and is a 9 kilometres (5.6 mi) wide volcanic cone.

Both Eifuku seamounts are hydrothermally active, with numerous vent sites found on NW Eifuku including the "Champagne" vent site, where there are a number of white smokers. Diverse ecosystems dominated by mussels live in proximity and around the hydrothermal vent sites.