MAGNETICS SEISMIC DATA ACQUISITION & INTERPRETATION MAGNETICS is the study of the Earth's magnetic field and how it interacts with the local surroundings. It is also a good method to incorporated to existing seismic reflection data and gravity data for a better interpretation of the sub-subface geology. Saudi Geophysical Consulting, can conduct magnetic seismic survey either AIR, LAND or MARINE. In our application it also includes the study of worldwide geomagnetic disturbances (geomagnetic storms) caused by the solar wind and disturbances caused by natural events such as earthquakes and possibly volcanic activity nearby. A geomagnetometer, or just magnetometer, is an instrument used to measure the magnetic field. The elements which are actually measured when determining the value of the earth's field are usually the declination, the dip and the horizontal component. For the instruments and methods used in measuring the dip. It remains to consider the measurement of the declination and the horizontal component, these two elements being generally measured with the same instrument, which is called a unifilar magnetometer. Magnetometry if performed from the air, it measures variations in the magnetic field. This gives an idea of the depth distribution of crystalline terrains which have no chance of containing any oil. Saudi Geophysical while acquiring seismic magnetic data, considers the following: Line Spacing: Indicates the distance between magnetic profile lines. The profile lines run east-west, so this distance specifies the north-south density of the observation points. No matter what is specified here, one survey line will be generated at y=0. Other survey lines will then be generated filling the 500 meter-wide survey area at the requested spacing. Station Spacing: This specifies the spacing of magnetic observation points within each line. Therefore, this distance gives the east-west density of observations. Measurements per Station: Number of magnetic readings taken at each station. Reported magnetic field strength will represent the average of the readings taken at each station. Multiple readings per station can be used to reduce the level of random noise associated with each measurment. The time required to complete the survey and the associated cost, however, increase as the number of readings increases. X-Coordinate of Base Station Location: Indicates the x position of your magnetic base station. Y-Coordinate of Base Station Location: Indicates the y position of your magnetic base station. Magnetometry can detect buried ferrous objects such as underground tanks and drums, or geologic structures such as igneous dikes, that cause local disturbances in the earth's magnetic field. 1. The shape of these magnetic "anomalies" indicates the location and approximate burial depth of the anomaly sources 2. Can be hampered by above-ground metal objects and overhead power lines which interfere with data collection Figure 01. Marine magnetometer sensor G-882 from GEOMETRICS. The G-882 is flexible for operation in small boat, shallow water surveys as well as deep tow applications (4,000 psi rating, telemetry over steel coax available to 10Km). Being small and lightweight (40 lbs net, no extra weights) it is easily deployed and operated by one person.. Please contact us for further details about our MAGNETICS services.