Geomagnetic (NGK, EYR) and Geoelectric (NGK) Field Measurements

The Niemegk (NGK) geomagnetic and geoelectric field measurements were provided by Juergen Matzka GFZ German Research Centre for Geosciences, Potsdam, Germany. The original Eyrewell (EYR) geomagnetic field measurements were provided by Tanja Petersen (GNS Science, New Zealand), and subsequently processed to MATLAB format by Craig Rodger (University of Otago, New Zealand). File Descriptions: ng0v031029a.dat NGK geomagnetic field measurements are provided in XYZ coordinates at 0.5 s resolution t2003-10-29_302.ngk NGK geoelectric field measurements are provided in geographic coordinates (x=north, y=east) in units of mV at 1s resolution. To get the electric field in mV/km, you have to divide the numbers by 1 km for Ex (electrode spacing is 1000 m) and by 0.95 km for Ey (electrode spacing is 950 m). EYR5sec10292003.mat EYR geomagnetic field measurements (horizontal magnitude of the magnetic field) are provided in units of nT at 5s resolution.