Data Collection Technology and Application Research for N-MT Magnetoelectricity Observation System

In this paper, we first introduce data collection and data conversion methods in N-MT electromagnetic observation system, so that they can be easier written into the oracle precursor database. Second, we research application methods of these data in earthquake prediction, and compute the second value of the N-MT electromagnetic field observation system and FHDZ-M15 geomagnetic field integrative observation system with the vertical component Z, the horizontal component H and the magnetic declination D by the MT method, and gain 18 cycles' apparent resistivity and impedance phase changing curve with time. The results show that some cycles' s the continuous time series curve of apparent resistivity and impedance phase of MT one-dimensional inversion have showed the abnormal changes before Lulong M
_L
4.2 earthquake at March 11, 2008. For the pre-earthquake prediction, it has an important application research value.