Методика ускоренного изучения локальных аномалий векового хода геомагнитного поля Ямала

• Main Author: Овчаренко, А. В.
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: УГЛТУ 2017
• Subjects: POINTS OF THE SECULAR VARIATION OF A MAGNETIC FIELD; ANOMALY; HIGH LATITUDES; IGRF-2011-2015; ПУНКТЫ ВЕКОВОГО ХОДА МАГНИТНОГО ПОЛЯ; АНОМАЛИИ; ВЫСОКИЕ ШИРОТЫ; Arctic; Ust’-Yuribey
• Online Access: https://elar.usfeu.ru/handle/123456789/6654

The technique of fast studying of local anomalies of the century course of the geo-magnetic field is offered. Traditional techniques provide repeated long-term measurements on a network of magnetic observatories and points of repeated measurements. Map development at the same time lasts for many years. Sufficient material for an express assessment of local anomalies of the century course even on a network of single measurements is saved up. On the territory of the USSR the card of the absolute module of magnetic induction of HT of an era 1964.0 is published. According to satellite data models of the geomagnetic field for eras 1900-2015 with a possibility of extrapolation to 2025 are created. Application of these information sources gives the chance to exclude the continental anomalies of the secular variation and static anomalies caused by sources in crust from measurements. The assessment of accuracy of the card of local anomalies of the secular variation can traditionally be carried out, by repeated measurements and calculations of local anomalies. By such technique geomagnetic measurements in the Arctic zone of Yamal in 10 new points of studying of local anomalies of the secular variation are executed. Points are reliably fixed on the district for performance of repeated supervision in the future, provided with a satellite geodetic binding of decimeter accuracy, the photosketch map and the electronic catalog of measurements are made. Heteroge-neity of the vulgar field on each point on platforms of 50х50 m is studied. Presentability of the field for the area in a radius of 1-2 km is estimated. Results of measurements are com-pared with the international satellite IGRF11 model, and also with the card of a magnetic field of NT USSR, the Epoch 1964.0. According to previously processed data extensive positive anomaly of the local secular variation around a trading station Ust-Yuribey which most likely reflects modern geodynamic activity of the region is revealed. In the southern direction anomaly adjoins to the ...