Advances in Space Environment Research
Volume I
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Article
A Comparative Analysis of Ground, Magnetospheric and Interplanetary Observations of Long Period Magnetic Oscillations
Continuous measurements of the geomagnetic field variations at ground stations are important to investigate several aspects of magnetospheric dynamics related to variations in the solar wind conditions which, ...
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Article
Experimental Aspects of Mid-Frequency Pulsations (f≈10–100 mHz) in the Southern Polar Cap
We review the results obtained in the frequency range of Pc3 (22-100 mHz) and Pc4 (7-22 mHz) pulsations at Italian Antarctic stations in the southern polar cap (“Mario Zucchelli”, at Terra Nova Bay, TNB, 80˚.S; “...
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Some aspects of the low latitude geomagnetic response under different solar wind conditions*
We review some aspects of low latitudes (L≤2) geomagnetic field variations associated with magnetospheric pulsations as well as with continuous and impulsive variations of the solar wind (SW) pressure.
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Chapter
Some Aspects of the Low Latitude Geomagnetic Response under Different Solar Wind Conditions
We review some aspects of low latitudes (L≤2) geomagnetic field variations associated with magnetospheric pulsations as well as with continuous and impulsive variations of the solar wind (SW) pressure.
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Article
An analysis of Pc3 and Pc4 pulsations at Terra Nova Bay (Antarctica)
We conducted a statistical analysis of the physical characteristics of the micropulsation activity (Pc3 and Pc4 range) detected, during the austral summer 1994/95, at Terra Nova Bay (Antarctica, corrected lati...
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Article
The Earth’s passage of the April 11, 1997 coronal ejecta: geomagnetic field fluctuations at high and low latitude during northward interplanetary magnetic field conditions
An analysis of the low frequency geomagnetic field fluctuations at an Antarctic (Terra Nova Bay) and a low latitude (L’Aquila, Italy) station during the Earth’s passage of a coronal ejecta on April 11, 1997 sh...
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Article
Pc3 pulsations during variable IMF conditions
Pc3 geomagnetic field fluctuations detected at low latitude (L’Aquila, Italy) during the passage of a high velocity solar wind stream, characterized by variable interplanetary magnetic field conditions, are an...
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Article
Low frequency geomagnetic field fluctuations at low latitude during the passage of a higher pressure solar wind region
The passage of a higher pressure solar wind region at the Earth’s orbit marked the onset of low latitude (L = 1.6) fluctuations in the frequency range (0.8–5.5 mHz) for both the horizontal geomagnetic field compo...
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Article
Some evidence of ground power enhancements at frequencies of global magnetospheric modes at low latitude
A statistical analysis of the power spectra of the geomagnetic field components H and D for periods ranging between 3 min and 1 h was conducted at a lowlatitude observatory (ĽAquila, L = 1.6) at the minimum and m...
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Article
Low-frequency (1.7–6.7 mHz) geomagnetic-field fluctuations at high southern latitudes
The low-frequency (1.7–6.7 mHz) powers of the horizontal componentsH andD recorded at the Antarctic Italian geomagnetic observatory at Terra Nova Bay (geomagnetic coordinates 77.3S, 279.4 E) during the austral su...
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Article
An analysis of geomagnetic field variations (3 min-2 h) at a low-latitude observatory (L=1.6)
An analysis of the geomagnetic field variations between 3 min and 2 h at L’Aquila (L=1.6) shows that the power level in the low-frequency range (i.e. for periods longer than approximately 10 min) at solar maximum...
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Article
Selected solar wind parameters at 1 AU through two solar activity cycles
In situ measurements of the solar wind largely cover more than two solar magnetic activity cycles, namely 20 and 21. This is a very appealing opportunity to study the influence of the activity cycle on the beh...
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Article
New remarks on the magnetic-field regime in the distant geomagnetic tail: Pioneer 8
The emerging overview of the distant tail suggests to interpret some aspects of the magnetic-field observations obtained during January 1968 by Pioneer 8 in the region of expected tail (∼500R ...
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Article
Solar-wind controlled pulsations at low latitudes
Past observations and present models of the solar-wind controlled dayside Pc 3-Pc 4 pulsations are reviewed. A year-long comparison between solar-wind parameters obtained from IMP-8 and micropulsation measurem...
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Article
A spherical harmonics filter for solar oscillations research
A scheme, based on the expansion of solar oscillations into spherical harmonics, for the identification of sectorial modes of intermediate degree in the interval 3 < l < 20 is presented. In this range, the freque...
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Article
Micropulsation measurements at low latitudes
Measurements of the geomagnetic field variations performed. at L'Aquila in the range of frequency of micropulsations suggest that the most important events mainly perturb, during daytime intervals, the H-compo...
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Article
Spectral analysis of the geomagnetic activity indexAp during different IMF conditions (1947–1978)
The spectral analysis of the geomagnetic activity indexAp (1947–1978) has been conducted for intervals associated respectively with two and four sectors of the interplanetary magnetic fields per solar rotation. A...
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In-situ observations of the latitudinal gradients of the solar wind parameters during 1976 and 1977
Interplanetary observations from Helios 1, Helios 2, and IMP-8 spacecraft during 1976 and 1977, namely the early portion of solar cycle 21, have been used to investigate the latitudinal gradients of the solar ...
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Article
Geomagnetic turbulence at L'Aquila (Italy): Preliminary results of a variance analysis
Some preliminary measurements of the geomagnetic turbulence at L'Aquila, in the range of frequency of micropulsations, have been conducted during November 1983. The 60 s variances of the horizontal components ...
