The human impact on the Pc1 wave activity

On the man-made contamination on ULF measurements: evidence for disturbances related to an electrified DC railway

“…; in addition, the concentration of most activities at the Scuola Ispettori e Sovraintendenti della Guardia di Finanza (i.e., close the geomagnetic observatory) did not influence appreciably the level and characteristics of such contamination. We also found in all components a clear weekly modulation, with minimum power values on Sundays and reduced values on Saturdays: this result conflicts with those ones obtained at higher frequencies (0.2-5 Hz) at L ≈ 2.9 by Guglielmi and Zotov (2007), who found during Saturday-Monday an activity ≈ 10 % larger than through the rest of the week. All these aspects suggest that such a major disturbance is likely related to the influence of the DC electrified RomePescara railway (whose closest segment is located at D min ≈ 33 km from our observatory), which maintained the same train traffic after the earthquake.…”

The phenomenon of synchronism in the magnetosphere-technosphere-lithosphere dynamical system

“…Figures 1, 2, 10, and 11 clearly demonstrate specific hidden periodicities in the industrial activity and, thus, shed light on the origin of the phenomenon of synchronism in the activity of the electromagnetic Pc1 emissions and the earthquakes. More examples can be found in (Guglielmi et al, 1978;2011;Fraser Smith, 1979;Samadani et al, 1981;Guglielmi and Zotov, 2007;2008;Zotov, 2007;Zotov and Guglielmi, 2010). It is instructive that global synchronism in the functioning of the technosphere was discovered in our work by studying the geophysical pro cesses in the magnetosphere and lithosphere.…”

“…The reality of this effect was called into question in a series of publications (see, e.g., Karinen et al, 2002). Therefore, in (Guglielmi and Zotov, Figure 7 clearly demonstrates the weekly cycle in Pc1 activity with the maximum on Sundays (Guglielmi and Zotov, 2007). In this figure, the Pc1 activity is char acterized by the duration of the oscillations in hours; for clarity, we eliminated the linear trend in the graphs.…”

“…Qualitative mechanisms of energy transfer to the ionosphere and magnetosphere through electromag netic and acoustic processes were suggested; however, this question is still under discussion (see, e.g., Guglielmi, 1979;Fraser Smith, 1979;Guglielmi and Zotov, 2007;Zotov and Guglielmi, 2010;Guglielmi et al, 2011 and references therein). The short time delay of the HM effect certainly points to the electromagnetic pulses as a factor responsible for this effect.…”

“…Lately, interest in this phenomenon has increased thanks to the successful application of the method of synchronous detection for analyzing huge volumes of digital data on the Pc1 pulsations in the magnetosphere (Guglielmi, 2007;Guglielmi and Zotov, 2007;2008;Zotov, 2010;Zotov and Guglielmi, 2010b;Guglielmi et al, 2011) and on earthquakes (Zotov, 2007;Dovbnya, Zotov, and Schepetnov, 2008;Zotov and Guglielmi, 2010a).…”