oa Moving Audio Magnetotelluric (AMT) Test Measurement

This study is to test the idea of the developed Audio Magnetotelluric (AMT) method by placing the magnetic sensors in the air instead of burying in the gound. Five channels electric and magnetic fields are measured. The data acquistion time for each station is around 15 minutes and is enough to cover the frequency range from 30 to 300 Hz. Normal MT processing techniques are used for the data collected by the developed method to yield frequency domain transfer functions. The data quality from the test measurement is rather good with smooth apparent resistivity and phase. The developed method is proved to have several supriorites than the normal AMT measurement, and is applicable to shallow depth investigation efficiently in the future.