Human Physiological Parameters Related to Solar and Geomagnetic Disturbances: Data from Different Geographic Regions

It is well known that the various manifestations of space weather can influence a wide range of human activities, from technological systems to human health. Various earlier, as well as more recent multi-disciplinary heliobiological and biometeorological studies have revealed that the human organism is sensitive to environmental physical activity changes and reacts to them through variations of the physiological parameters of the human body. This paper constitutes an overview of the National and Kapodistrian University of Athens investigations in regard to the possible effect of solar, geomagnetic, and cosmic ray activity on human physiological parameters. The Athens Cosmic Ray and Solar Physics Groups collaborated with scientific teams from different countries, statistically processing and analyzing data related to human physiological parameters (such as mean heart rate, arterial systolic, and diastolic pressure), or the number of incidents of different types of cardiac arrhythmias and so forth, in relation to data concerning and describing geomagnetic activity (geomagnetic indices Ap and Dst) and variations in cosmic ray intensity (Forbush decreases and cosmic ray intensity enhancements). In total, four projects were carried out concerning data from different geographical regions (Baku, Azerbaijan; Kosice, Slovakia; Tbilisi, Georgia; Piraeus, Greece), covering different time periods and time scales (daily data or yearly data), and referring to different groups of individuals (selected healthy persons or random persons). The studies concluded with interesting results concerning the possible influence of geomagnetic and cosmic ray activity on the human physiological state.

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The effect of cosmic ray intensity variations and geomagnetic disturbances on the physiological state of aviators

Astrophysics and Space Sciences Transactions ◽

10.5194/astra-7-373-2011 ◽

2011 ◽

Vol 7 (3) ◽

pp. 373-377 ◽

Cited By ~ 7

Author(s):

M. Papailiou ◽

H. Mavromichalaki ◽

K. Kudela ◽

J. Stetiarova ◽

S. Dimitrova ◽

...

Keyword(s):

Physiological State ◽

Cosmic Ray ◽

Geomagnetic Disturbances ◽

Cosmic Ray Intensity

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Responses and Periodic Variations of Cosmic Ray Intensity and Solar Wind Speed to Sunspot Numbers

Advances in Astronomy ◽

10.1155/2020/3527570 ◽

2020 ◽

Vol 2020 ◽

pp. 1-10 ◽

Cited By ~ 1

Author(s):

Jacob Oloketuyi ◽

Yu Liu ◽

Amobichukwu Chukwudi Amanambu ◽

Mingyu Zhao

Keyword(s):

Solar Wind ◽

Wind Speed ◽

Solar Wind Speed ◽

Phase Relationship ◽

Cosmic Ray ◽

Strong Negative Correlation ◽

Cosmic Ray Intensity ◽

Sunspot Numbers ◽

Daily Data ◽

Wide Range

To investigate the periodic behaviour and relationship of sunspot numbers with cosmic ray intensity and solar wind speed, we present analysis from daily data generated from 1995 January to 2018 December. Cross-correlation and wavelet transform tools were employed to carry out the investigation. The analyses confirmed that the cosmic ray intensity correlates negatively with the sunspot numbers, exhibiting an asynchronous phase relationship with a strong negative correlation. The trend in cosmic ray intensity indicates that it undergoes the 11-year modulation that mainly depends on the solar activity in the heliosphere. On the other hand, the solar wind speed neither shows a clear phase relationship nor correlates with the sunspot numbers but shows a wide range of periodicities that could possibly be connected to the pattern of coronal hole configuration. A number of short and midterm variations were also observed from the wavelet analysis, i.e., 64–128 and 128–256 days for the cosmic ray intensity, 4–8, 32–64, 128–256, and 256–512 days for the solar wind speed, and 16–32, 32–64, 128–256, and 256–512 days for the sunspot numbers.

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STUDY OF FORBUSH DECREASE EVENT AND ASSOCIATED GEOMAGNETIC FIELD AND COSMIC RAY INTENSITY VARIATION

International Journal of Modern Physics A ◽

10.1142/s0217751x05029915 ◽

2005 ◽

Vol 20 (29) ◽

pp. 6717-6719 ◽

Cited By ~ 2

Author(s):

S. K. MISHRA ◽

D. P. TIWARI ◽

S. C. KAUSHIK

Keyword(s):

Forbush Decrease ◽

Intensity Variation ◽

Cosmic Ray ◽

Strong Relationship ◽

Geomagnetic Disturbances ◽

Slow Recovery ◽

Short Term ◽

Cosmic Ray Intensity ◽

Transient Disturbances ◽

Term Basis

Transient decrease in cosmic ray intensity following by a slow recovery typically lasting for several days is identified as Forbush decrease (Fd) event. As a result the geomagnetic index (Dst) decreased up to 300 nT, indicating a large geomagnetic storm and the percentage Fd decrease has gone to 16% giving rise a cosmic ray storm. Both events coincided with interplanetary conditions. Therefore, a systematic study has been performed to investigate the variation of cosmic ray intensity along with the interplanetary and geomagnetic disturbances. Results indicate a strong relationship between geomagnetic activity and Forbush decrease on short-term basis. Two types of interplanetary transient disturbances, namely magnetic cloud events and bidirectional events are analyzed to study the short-term changes in the solar wind (SW) plasma components as well as in cosmic ray intensity.

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Anomalous Forbush effects from sources far from Sun center

Proceedings of the International Astronomical Union ◽

10.1017/s1743921309029688 ◽

2008 ◽

Vol 4 (S257) ◽

pp. 451-456

Author(s):

E. Eroshenko ◽

A. Belov ◽

H. Mavromichalaki ◽

V. Oleneva ◽

A. Papaioannou ◽

...

Keyword(s):

Solar Wind ◽

Cosmic Ray ◽

The Sun ◽

Geomagnetic Disturbances ◽

Cosmic Ray Intensity ◽

The Earth ◽

The Common ◽

Solar Wind Parameters ◽

Significant Disturbance ◽

Forbush Effect

AbstractThe Forbush effects associated with far western and eastern powerful sources on the Sun that occurred on the background of unsettled and moderate interplanetary and geomagnetic disturbances have been studied by data from neutron monitor networks and relevant measurements of the solar wind parameters. These Forbush effects may be referred to a special sub-class of events, with the characteristics like the event in July 2005, and incorporated by the common conditions: absence of a significant disturbance in the Earth vicinity; absence of a strong geomagnetic storm; slow decrease of cosmic ray intensity during the main phase of the Forbush effect. General features and separate properties in behavior of density and anisotropy of 10 GV cosmic rays for this subclass are investigated.

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Impacts on Cosmic-Ray Intensity Observed During Geomagnetic Disturbances

Solar Physics ◽

10.1007/s11207-017-1183-3 ◽

2017 ◽

Vol 292 (10) ◽

Cited By ~ 3

Author(s):

Binod Adhikari ◽

Nirakar Sapkota ◽

Prashrit Baruwal ◽

Narayan P. Chapagain ◽

Carlos Roberto Braga

Keyword(s):

Cosmic Ray ◽

Geomagnetic Disturbances ◽

Cosmic Ray Intensity

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THE ONSET TIMES OF FORBUSH-TYPE COSMIC RAY INTENSITY DECREASES

Canadian Journal of Physics ◽

10.1139/p59-108 ◽

1959 ◽

Vol 37 (9) ◽

pp. 970-982 ◽

Cited By ~ 37

Author(s):

A. G. Fenton ◽

K. G. McCracken ◽

D. C. Rose ◽

B. G. Wilson

Keyword(s):

Daily Variation ◽

Cosmic Ray ◽

Consistent Pattern ◽

Maximum Sensitivity ◽

Geomagnetic Disturbances ◽

Cosmic Ray Intensity ◽

Early Stages ◽

The Earth ◽

Directional Anisotropy ◽

Quiet Day

The onset times of a number of Forbush-type decreases observed at four widely spaced stations are compared, and it is shown that appreciable differences occur. The stations selected were Hobart, Mawson, Ottawa, and Sulphur Mountain. It was found that a consistent pattern is obtained for the events studied when the onset times are plotted as a function of the direction of maximum sensitivity of the recorders relative to the earth-sun line. This is interpreted as being due to a directional anisotropy that exists in the mechanism producing the decreases, at least in the early stages. The depression occurs first for particles arriving from directions between 30° and 120° west of the earth–sun line. The relation between these observations and geomagnetic disturbances and the quiet-day daily variation is discussed.

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GLOBAL COSMIC RAY INTENSITY CHANGES, SOLAR ACTIVITY VARIATIONS AND GEOMAGNETIC DISTURBANCES AS NORTH ATLANTIC HURRICANE PRECURSORS

International Journal of Modern Physics A ◽

10.1142/s0217751x0502985x ◽

2005 ◽

Vol 20 (29) ◽

pp. 6699-6701 ◽

Cited By ~ 4

Author(s):

S. P. KAVLAKOV

Keyword(s):

Solar Activity ◽

North Atlantic ◽

Cosmic Ray ◽

Geomagnetic Disturbances ◽

Cosmic Ray Intensity ◽

The North ◽

Intensity Changes ◽

Major Hurricane ◽

The North Atlantic ◽

Activity Indices

It was shown that specific changes of the sunspots (SS) number, cosmic ray (CR) intensity and geomagnetic activity indices AP and KP were statistically noticeable in the interval of 30 days before the appearance of a cyclonic rotational system over the North Atlantic, developing gradually in a major hurricane.

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CRITERIA FOR THE ASSOCIATION OF SOLAR FLARES WITH GEOMAGNETIC DISTURBANCES

Canadian Journal of Physics ◽

10.1139/p63-111 ◽

1963 ◽

Vol 41 (7) ◽

pp. 1056-1075 ◽

Cited By ~ 9

Author(s):

R. W. Jenkins ◽

Irvine Paghis

Keyword(s):

Solar Flares ◽

Maximum Concentration ◽

Cosmic Ray ◽

Ground Level ◽

Detailed Examination ◽

Sudden Commencement ◽

Strong Positive Correlation ◽

Geomagnetic Disturbances ◽

Wide Range ◽

East West

The statistical relation between solar flares of importance [Formula: see text] and the onset of geomagnetic disturbances was studied for 1949–61. Disturbances were defined as an increase in ap[Formula: see text], occurring within 12 hours or less, and these disturbances include both gradual and sudden commencement events. Associated radio noise bursts at frequencies below 300 Mc were used to select 240 major-burst flares, and the effects of flare importance, time of solar epoch, and associated polar-cap-absorption (PCA) events were considered in turn. A detailed examination was made of the effect of flare heliographic location. There is a strong positive correlation between the occurrence of major-burst flares and geomagnetic disturbances 1 to 3 days afterwards. The degree of correlation is approximately doubled when the major-burst flare is associated with a PCA event. The most probable time delay between flares and disturbances is 1.5 to 2.0 days, and this timing is relatively constant over a wide range of conditions.The dominance of northern storm-flares (Bell 1961) was confirmed for 1949–61. Detailed analysis shows that the effect is strongest for heliographic latitudes above 15 °N. In addition to this effect, there was a consistent western bias of the storm-flares in both the northern and southern hemispheres, for flares associated with either gradual or sudden commencement (SC) events, with maximum concentration occurring at 10 °W. to 15 °W. Major-burst flares associated with PCA events also show this western bias; the data suggest that there is a systematic increase in east–west asymmetry in going from major-burst storm-flares to major-burst PCA flares to PCA flares accompanied by ground-level cosmic-ray increases. The corresponding longitudes of maximum concentration of the associated flares are about 10 °– 15 °W., 45 °W., and 75 °W.

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