Fig. 2From: Seawater motion-induced electromagnetic noise reduction in marine magnetotelluric data using current metersAn ocean bottom electromagnetic receiver (OBEM) recovery during the EM survey in the Shenhu area. The current meter is installed at the top of the vertical electrode arm, which floats freely via buoyant forces when the OBEM is deployed on the seafloor and measures current velocity using the tilt of the current meterBack to article page