Statistical study of magnetic disturbances at the Earth's surface

Possibility of Excitation of Magnetospheric Modes by Strong Geomagnetic Storms

“…This value has particularly called our attention because it recovers the same value seen on the work of [14]. This value represents the change of regime of the magnetic component H. On the set of SGS we have, more 10 present defined modes.…”

Statistical properties of global geomagnetic indexes as a potential forecasting tool for strong perturbations

“…Note that in the work by Papa and Sosman (2008) after the selection process a filtering methodology was necessary (Papa et al, 2006), which is unnecessary for the present case; the published SYM-H index is the result of an appropriated filtering and average procedure over several magnetic observatories around the world.…”

“…During the last decades many research efforts of statistical physicists have been devoted to the study of this kind of problems that include, among many others, earthquakes (Sornette, 2004), magnetic storms (Papa et al, 2006;Papa and Sosman, 2008) and geomagnetic reversals (Merrill et al, 1998;Dias et al, 2008). Magnetic storms are periods that last from one to three days during which the geomagnetic field suffers rapid variations.…”

“…The interest in characterizing the variations of the geomagnetic field begun as early as the 18th century (Good, 1988), increased during the following centuries with more elaborated techniques and appropriated equipments (Gauss, 1839;Alldredge et al, 1963) and remains growing in our days (Wanliss, 2005;Bolzan et al, 2005;Papa et al, 2006).…”

Simulation of geomagnetic reversals through magnetic critical models

“…However, it is far from being the unique geophysical subject where statistical physics could bring some light. Let us mention the problems of magnetic storms [2,3] and geomagnetic reversals [4]. We will focus our attention on geomagnetic reversals.…”