6:15 PM - 7:30 PM
[SEM33-P04] Broad-band telluric and magnetotelluric measurements in Oita prefecture, Kyushu, Japan
For MT impedance calculations, it is not necessary to record the magnetic field in all sites. Alternatively, the MT impedance can also be calculated by using the magnetic field of other sites. Indeed, such kind of impedances has been used to deduce the high-resolution resistivity structure (e.g., Unsworth et al., 1997). In an extreme case, it is possible to deduce the 3-D resistivity structure with single magnetic field site (e.g., Hata et al., 2015). Considering that omitting of magnetic field measurements leads to reduce the effort in the field, we developed a new telluric measurement apparatus with low power consumption (1.8W). In the presentation, we will show the result of the field test that is performed by using the new telluric apparatus and the MT apparatus. The broad-band (200~0.001 Hz) MT impedances obtained in the Oita prefecture, Kyushu, Japan, will also be shown.