2D Surface Structure Modeling in Bengkulu City using Geomagnet Method

Research on 2D modeling of the subsurface structure Bengkulu city area was carried out using geomagnetic method. In this study, we collected data from 130 measurement points a set Proton Procession Magnetometers (PPM) to obtain total magnetic field value. The were processed by making corrections daily variations and IGRF (International Geomagnetic Reference Field). We conducted correction contour anomaly. After that, anomaly used for reduction poles. This research results show pair positive negative closures. Cross-sections made closure pairs determine 2-dimensional (2D) model Mag2DC software. interpretation shows that three rock layers are continuously arranged. average susceptibility value first layer is 0.00001 cgs which sandstone at depth 0-400 meters; second has an 0.002 dominated clay 400-700 meters, and; third 0.006 basalt 700-1000 meters.