Three component magnetometer survey of the hydrothermal deposits in the deep sea of Tonga using ROV in 2012

Abstract

We conducted magnetic survey from 26, Jan. 2012 to 29, Jan. 2012 using R/V SONNE, ROV(Remotely Operated Vehicle) and three component magnetometer.This three component magnetometer sensor(HMR2300 Honeywell) are oriented in orthogonal directions to measure the X, Y and Z vector components of a magnetic field. During the magnetic survey, ROV followed the tracks of the plan with 50 m altitude above seafloor. The data of the magnetometer sensor, the motion sensor and USBL(Ultra Short Base Line) were recorded on a notebook through the optical cable of ROV using logging software. The position data of R/V SONNE and ROV were obtained from GPS and USBL. We simultaneously conducted the multi-beam echo sounder survey during the magnetic suvey. The obtained three component magnetic data are fully utilized by finding possible hydrothermal vents of the survey area.ections to measure the X, Y and Z vector components of a magnetic field. During the magnetic survey, ROV followed the tracks of the plan with 50 m altitude above seafloor. The data of the magnetometer sensor, the motion sensor and USBL(Ultra Short Base Line) were recorded on a notebook through the optical cable of ROV using logging software. The position data of R/V SONNE and ROV were obtained from GPS and USBL. We simultaneously conducted the multi-beam echo sounder survey during the magnetic suvey. The obtained three component magnetic data are fully utilized by finding possible hydrothermal vents of the survey area.