Natural and man-made low-frequency magnetic fields as a potential health hazard

Птицына, Н. Г.; Villoresi, G.; Дорман, Л. И.; Iucci, N.; Tyasto, M. I.

doi:10.1070/pu1998v041n07abeh000419

Cited by 52 publications

(36 citation statements)

References 104 publications

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“…On the basis of statistical data on several million medical events in Moscow and in St. Petersburg a sufficient influence of geomagnetic storms was found, accompanied by CR Forbush-decreases on the frequency of myocardial infarctions, brain strokes and car accident road traumas (Villoresi et al, , 1995. Earlier we found that among all characteristics of geomagnetic activity, Forbush decreases are better related to hazardous effects of solar variability-driven disturbances of the geomagnetic field (Ptitsyna et al, 1998). Figure 1 shows the correlation between cardiovascular diseases, car accidents and different characteristics of geomagnetic activity (planetary index AA, major geomagnetic storms MGS, sudden commencement of geomagnetic storm SSC, occurrence of a downward vertical component of the interplanetary magnetic field B z and also the CR intensity decreasing phase of Forbush decreases (FD)).…”

Section: Per Cycle (130 Days Per Cycle)mentioning

confidence: 99%

Space weather and dangerous phenomena on the Earth: principles of great geomagnetic storms forcasting by online cosmic ray data

Дорман

2005

Ann. Geophys.

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Abstract. According to NOAA space weather scales, geomagnetic storms of scales G5 (3-h index of geomagnetic activity K p =9), G4 (K p =8) and G3 (K p =7) are dangerous for satellites, aircrafts, and even for technology on the ground (influence on power systems, on spacecraft operations, on HF radio-communications and others). We show on the basis of statistical data, that these geomagnetic storms, mostly accompanied by cosmic ray (CR) Forbush-decreases, are also dangerous for people's health on spacecraft and on the ground (increasing the rate of myocardial infarctions, brain strokes and car accident road traumas). To prevent these serious damages it is very important to forecast dangerous geomagnetic storms. Here we consider the principles of using CR measurements for this aim: to forecast at least 10-15 h before the sudden commencement of great geomagnetic storms accompanied by Forbush-decreases, by using neutron monitor muon telescope worldwide network online hourly data. We show that for this forecast one may use the following features of CR intensity variations connected with geomagnetic storms accompanied by Forbush-decreases: 1) CR pre-increase, 2) CR pre-decrease, 3) CR fluctuations, 4) change in the 3-D CR anisotropy.

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Section: Per Cycle (130 Days Per Cycle)mentioning

confidence: 99%

Space weather and dangerous phenomena on the Earth: principles of great geomagnetic storms forcasting by online cosmic ray data

Дорман

2005

Ann. Geophys.

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“…Sudden fluctuations can be observed during large geomagnetic storms for 1 ± 2 days [15]. These are caused by the superimposition of equatorial ring current effects and auroral current effects, and generate field variations as large as 200 ± 300 nT at low latitudes and can exceed 1,000 nT at high latitudes [15]. Partonen et al [7] found a relationship between the smoothed monthly mean index of geomagnetic activity and the relative risk of suicide (n = 27,469) in Finland.…”

Section: Introductionmentioning

confidence: 99%

“…The basis of the K indices is the range of irregular variations in geomagnetic fields, which are measured for the two horizontal geomagnetic components, after eliminating so-called non-K variations [14]. Sudden fluctuations can be observed during large geomagnetic storms for 1 ± 2 days [15]. These are caused by the superimposition of equatorial ring current effects and auroral current effects, and generate field variations as large as 200 ± 300 nT at low latitudes and can exceed 1,000 nT at high latitudes [15].…”

Section: Introductionmentioning

confidence: 99%

Association of geomagnetic disturbances and suicides in Japan, 1999–2010

Tada

Nishimura

Nakatani

et al. 2013

Environ Health Prev Med

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Objectives Previous studies have shown a positive relationship between geomagnetic disturbances and an increased incidence of suicide. The Japanese suicide rate is the ninth highest in the world, but there have been no reports examining the relationship between geomagnetic disturbance and the number of suicides, and, therefore, this paper examines this relationship. Methods The number of Japanese suicides per month from January 1999 to December 2010 was obtained, and it was found that a total of 262,596 males and 102,539 females committed suicide during this period. To adjust the other factors which affect the number of suicides, a multiple linear regression analysis with backward elimination was carried out, with the monthly number of suicides as the response variable and the monthly mean K index value, monthly mean number of sunspots, monthly mean unemployment rate, proportion of elderly people (%), monthly mean air pressure (hPa), monthly mean air temperature (°C), monthly mean humidity (%), and monthly mean day length (h) as the explanatory variables. ResultsIn the multiple linear regression analysis for males, the monthly mean K index value was associated with the monthly number of suicides, but in females, the monthly mean K index value was not associated with the monthly number of suicides. Conclusion In this study, we generated a hypothesis that geomagnetic disturbances may trigger male suicides.

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“…For example, studies of rats exposed to ELF-EMFs have revealed that frequencies of 0.02, 0.5-0.6, 5-6 and 8-11 Hz had the greatest impact on the circulatory system (as described in the Introduction). 21 One hypothesis explaining the results of these previous studies is that humans may be especially physiologically sensitive to ELF-EMFs below 10 Hz, even when low magnetic flux densities are used. If true, this may be beneficial for the future clinical use of ELF-EMFs because the weak field used in our study (6-and 8 Hz, 1 mT, 10 V m À1 ) meets the guidelines of the International Commission on Non-Ionizing Radiation Protection.…”

Section: Discussionmentioning

confidence: 78%

“…Studies of rats exposed to ELF-EMFs in the frequency band of 0.01-100 Hz (with magnitudes of 5, 50 and 5000 nT) have revealed that ELF-EMFs at frequencies of 0.02, 0.5-0.6, 5-6 and 8-11 Hz had the greatest impact on the circulatory system. 21 We previously conducted a self-controlled study of 30 subjects, each of whom was exposed to at least fifteen 10-min sessions of a 6-and 8-Hz 1-mT ELF-EMF, and we found that the ELF-EMF induced a significant decrease in the BP of subjects with hypertension. 22 Based on the results of these previous studies, we considered it possible that ELF-EMFs could represent an alternative approach for controlling hypertension.…”

Section: Introductionmentioning

confidence: 99%

A 1-μT extremely low-frequency electromagnetic field vs. sham control for mild-to-moderate hypertension: a double-blind, randomized study

et al. 2011

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The effects of extremely low-frequency electromagnetic fields (ELF-EMFs) on blood pressure (BP) are controversial. In this double-blind, randomized, sham-controlled study, we examined the effects of repeated exposure to a 1-lT ELF-EMF on BP in 20 humans with mild-to-moderate hypertension. Subjects were randomly assigned to either the ELF-EMF group or the sham group. Subjects in the ELF-EMF group were exposed to an ELF-EMF (6-and 8 Hz, respectively, peak magnetic field 1 lT, peak electric field 10 V m À1 ) for at least two 10-to 15-min sessions per week, over a period of 4 weeks. In the sham group, the EMF-generating apparatus was not active. We obtained systolic and diastolic BP (SBP and DBP, respectively) measurements at registration and before and after each ELF-EMF exposure session. Subjects in the ELF-EMF and sham groups had mean ages of 52.8 and 55.1 years, and were exposed to a mean of 9.9 and 9.0 sessions, respectively. There was a significant difference between the ELF-EMF and sham groups with respect to change in SBP value between baseline and the end of the exposure regimen (P¼0.02), but not with respect to change in DBP (P¼0.21). There were no adverse events other than mild paresthesia of the hands of two subjects in the ELF-EMF group. Our results suggest that repeated exposure to an ELF-EMF has a BP-lowering effect on humans with mild-to-moderate hypertension.

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Natural and man-made low-frequency magnetic fields as a potential health hazard

Cited by 52 publications

References 104 publications

Space weather and dangerous phenomena on the Earth: principles of great geomagnetic storms forcasting by online cosmic ray data

Space weather and dangerous phenomena on the Earth: principles of great geomagnetic storms forcasting by online cosmic ray data

Association of geomagnetic disturbances and suicides in Japan, 1999–2010

A 1-μT extremely low-frequency electromagnetic field vs. sham control for mild-to-moderate hypertension: a double-blind, randomized study

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