Global Volcanism Program | Image GVP-10332
Axial volcano lies along the central Juan de Fuca Ridge crest about 480 km west of the Oregon coast. The summit reaches about 1.4 km below the ocean surface and is marked by a 3 x 8 km caldera (center). The caldera opens to the SE and has caldera walls up to 150 m high. Hydrothermal vents colonized with biological communities are located near the caldera boundary or along rift zones to the NE and S. In 1998 a lava flow was erupted from a fissure at the southern end of the caldera.
Image courtesy of National Oceanic and Atmospheric Administration (http://www.pmel.noaa.gov/vents/home.html).
Keywords: submarine volcano