Estimation of geomagnetic activity using measure of anomalousness

Main Article Content

Anatoly Soloviev
Sergey Agayan
Shamil Bogoutdinov

Abstract

Herein, we present a newly developed indicator for estimating geomagnetic activity. It is based on the magnitude of measure of anomalousness (MA) of magnetometer recordings at a given time or interval. It is intended for automated estimation of geomagnetic activity level in the area of a specific magnetic station or in a given region using data of a set of stations. It reflects geomagnetic activity level at different observatories in a single scale [-1, 1], regardless of their latitudinal location and consequently typical disturbance amplitudes. To a certain extent MA indicator is an analog of traditional K index. However, a well-known shortcoming of the latter is its long, 3-hour update rate. Moreover, K index calculation requires subtraction of Sq variation that also causes delays. At the same time there is a demand for operational geomagnetic indices that have maximal time resolution and are available in near real-time. The proposed MA indicator aims to address the shortcomings of the traditional K index. The MA calculation may be implemented automatically with the same time resolution as the initial data are recorded.

Article Details

How to Cite
1.
Soloviev A, Agayan S, Bogoutdinov S. Estimation of geomagnetic activity using measure of anomalousness. Ann. Geophys. [Internet]. 2017Jan.7 [cited 2021Oct.22];59(6):G0653. Available from: https://www.annalsofgeophysics.eu/index.php/annals/article/view/7116
Section
Geomagnetism and Paleomagnetism