The second stage of the 2019 exploration program consists of a caldera-wide geophysical survey utilizing the Controlled Source Audio-frequency
Magnetotellurics (CSAMT) method, capable of obtaining high resolution subsurface 3D map imagery to depths of 1,000m below surface.
In terms of technology, the market has been classified into magnetic, gradiometry, gravity, electromagnetics, LIDAR, hyperspectral, ground penetrating, resistivity, and others (induced polarization and
magnetotellurics).
It involves a technique called
magnetotellurics, or MT for short, that will see scientists collecting geophysical data in four of the Te Arawa/Rotorua lakes to help build a picture of the sub-surface.
Hughes, "Controlled source audio-frequency
magnetotellurics," in Electromagnetic methods in applied geophysics, M.
"The thing that is remarkable about Emily and made her the perfect person to do this study is that, because of her two very disparate scientific interests in experimental petrology and
magnetotellurics, she was able to put these different results together and say, "They're telling us the mantle's hotter than we thought.' Working separately, Rob (Evans) and I wouldn't have been able to do that," Gaetani said.
Keywords: Eastern margin of Qinghai--Tibet Plateau, Bouguer gravity, Long period
magnetotellurics, Crustal fluid, Apparent density
In 2016 the partners plan to drill the
magnetotellurics anomaly comprising the core of the Evening Star prospect.
Sheen, "On the existence and uniqueness of solutions to Maxwell's equations in bounded domains with application to
magnetotellurics," Mathematical Models and Methods in Applied Sciences, vol.
The geometry of the subduction zone was studied by Lucke (2012) by means of a synoptic model which takes into account three-dimensional data (local earthquake seismic tomographies), two-dimensional cross sections (refraction and reflection seismic,
magnetotellurics) and onedimensional data (receiver functions, earthquake hypocenters) to constrain a three-dimensional density model from gravity data interpretation.
Muography in this study can be compared with previous studies of the subsurface structure of Usu volcano such as
magnetotellurics carried out by Ogawa et al.
Since that time dozens of different geophysical tools have been developed for measuring resistivity, including
magnetotellurics, electromagnetics, laser magnetometers and ultra-high-resolution (UHR) aeromagnetics.
and Matsuo, K.: 1994, Effects of regional noise on
magnetotellurics and their removal by far remote reference method.
