At the OCEEMlab Ocean and Earth ElectroMagnetic laboratory at the University of Texas Institute for Geophysics, pushing the envelope of geoscience knowledge is our goal! We strive to unveil Earth’s complex processes to advance a human-sustainable environment.

2020年1月13日 · EM noise is caused by seawater current EM induction and by rocking of the instrument. It is well known that mechanical motion of an induction coil in the Earth’s magnetic field will generate an additional magnetic field, and hence correlated noise, but this should not affect the electrical field unless v × B is comparable to the ambient field.

Even though acoustic waves can travel long distances in the sea with little attenuation, ocean electromagnetics has important applications in the areas of geophysical surveys and searches of the seafloor and sub-bottom, communications across the sea–air boundary, and high data transfer rate at short ranges.

2019年5月22日 · Ocean circulation’s magnetic signals contribute to the total magnetic field observed at the Earth’s surface or by low-orbit satellite missions. In this paper, we concentrate on accurate numerical modelling of the OIMF employing various approaches.

2011年6月30日 · This review provides an overview of these recent developments, covering industrial and academic use of marine EM for resource exploration and tectonic investigations, ranging from acquisition technology and modeling approaches to new physical and geological insights learned from recent data sets.

2024年9月27日 · Electromagnetic (EM) waves are one of the important carriers for information exchange in seawater. The EM parameters of seawater are important factors that affect the...

Starting in 2006, new marine electromagnetic instruments have been developed at GEOMAR. These OBEM (ocean bottom electromagnetic) systems are used to measure the horizontal components of the electrical field with two orthogonal, 10m long dipole arms as well as the three components of the magnetic field using a high-precision fluxgate magnetometer.

2016年12月1日 · Results from eight microstructure EM-APEX floats deployed in the Sargasso Sea are presented here. The slow profiling speed of EM-APEX floats enables them to resolve the higher wavenumber regime of the microscale temperature …

Ocean-bottom electromagnetic (EM) receivers are used to record EM signals for marine magnetotelluric and controlled-source EM offshore data acquisition. These marine EM data are used for offshore gas hydrate and petroleum exploration.

An OBEM (ocean bottom EM) receiver is mainly composed of a pressure chamber, glass spheres, data logger, electric field and magnetic field sensor, attitude measuring device, acoustic release device, USBL positioning beacon, measuring arms, and anchor, and can achieve high-precision acquisition of marine weak electromagnetic field signal.