Bathymetric map of the NeMO Observatory at Axial Volcano. Depths are color-coded from red=shallow to purple=deep (depths in meters by color are shown on the legend in the lower left). Hydrothermal vent locations are indicated with large crosses (high-temperature) and blue stars (diffuse-low temperature); major vent fields are Ashes, Casm and Sonne. Stippled black lines represent north and south rift zones.
Other symbols represent scientific instrumentation in place or planned for future deployment.
MTR/CM: Current meter moorings to detect water flow direction at depth
SIO OBH: Scripps Institution of Oceanography's Ocean Bottom Hydrophones to detect small earthquakes
Rumbleometers: bottom mounted instrument to detect earthquakes and ground tilt
Extensometer: array of instrument to detect plate movement/stretching
HOBOS: high temperature probes to detect long term changes in temperature
Osmos: time-series information gatherer of changes in seawater
Time Lapse Camera: long-term deployed camera to image changes on seafloor