Geomagnetic storm under laboratory conditions: randomized experiment

Abstract

The influence of the previously recorded geomagnetic storm (GS) on human cardiovascular system and microcirculation has been studied under laboratory conditions. Healthy volunteers in lying position were exposed under two artificially created conditions: quiet (Q) and storm (S). The Q regime playbacks a noise-free magnetic field (MF) which is closed to the natural geomagnetic conditions on Moscow's latitude. The S regime playbacks the initially recorded 6-h geomagnetic storm which is repeated four times sequentially. The cardiovascular response to the GS impact was assessed by measuring capillary blood velocity (CBV) and blood pressure (BP) and by the analysis of the 24-h ECG recording. A storm-to-quiet ratio for the cardio intervals (CI) and the heart rate variability (HRV) was introduced in order to reveal the average over group significant differences of HRV. An individual sensitivity to the GS was estimated using the autocorrelation function analysis of the high-frequency (HF) part of the CI spectrum. The autocorrelation analysis allowed for detection a group of subjects of study which autocorrelation functions (ACF) react differently in the Q and S regimes of exposure.

Low‐Frequency Magnetic Fields in Cars and Office Premises and the Geomagnetic Field Variations

“…The effect of MF variations on the human cardiovascular system in tested subjects has been demonstrated in observational [Alabdulgader et al, 2018] and laboratory studies with a simulation of previously recorded variations of the geomagnetic field [Gurfinkel et al, 2018; Pishchalnikov et al, 2019]. A lowering of the constant MF also affects humans [Sarimov et al, 2008; Binhi and Sarimov, 2009].…”

“…Despite the smallness of the values of geomagnetic disturbances compared with urban MF, when comparing their integral powers over a wide range of 10 −5 –1 Hz, the correlations between magnetic storms and the state of the human organism are reliably established [Breus et al, 2016]. There is evidence of a direct effect of artificial magnetic storms on the human organism [Gurfinkel et al, 2018; Pishchalnikov et al, 2019], as well as on planktonic species [Krylov and Osipova, 2019].…”

“…Borok Geophysical Observatory: power density spectra of MFs during a strong magnetic storm k = (line moderate geomagnetic disturbances k = 5 (line 6), and for a calm geomagnetic environment k 4 (line MF = magnetic field. et al, 2018] and laboratory studies with a simulation of previously recorded variations of the geomagnetic field [Gurfinkel et al, 2018;Pishchalnikov et al, 2019]. A lowering of the constant MF also affects humans [Sarimov et al, 2008;Binhi and Sarimov, 2009].…”

“…Recently, it was found that the laboratory reproduction of magnetic fields (MFs) previously recorded in urban conditions during a medium geomagnetic storm ( k ‐index = 5–6, ΔB ~150 nT) might have a direct effect on the cardiovascular characteristics in several subjects [Gurfinkel et al, 2018; Pishchalnikov et al, 2019]. Changes in the magnetic flux density during geomagnetic storms amount to hundreds of nT and occur within a few hours, that is, in the frequency range 10 −3 –10 −4 Hz.…”

The Influence of Changes in Magnetic Variations and Light–Dark Cycle on Life‐History Traits of Daphnia magna

“…Based on the analysis of experimental data [Krylov et al, 2014; Martinez‐Breton and Mendoza, 2016; Gurfinkel et al, 2018] and the correlations between geomagnetic indices and biological processes [Chernouss et al, 2001; Gmitrov and Gmitrova, 2004; Azcaratea et al, 2016], it was previously suggested that geomagnetic storms could be perceived by organisms as a distortion of diurnal geomagnetic variation [Krylov, 2017; Krylov et al, 2019]. In other words, the inconsistency of circadian biochemical processes synchronized with light regime and diurnal geomagnetic variation may be responsible for the medical and biological effects of geomagnetic storms.…”