scholarly journals Magnetic anomalies possibly linked to local low seismicity

2009 ◽  
Vol 9 (5) ◽  
pp. 1567-1572 ◽  
Author(s):  
F. Masci ◽  
P. Palangio ◽  
M. Di Persio
Keyword(s):  
Geomagnetic Field ◽  
Central Italy ◽  
Low Frequency ◽  
Magnetic Anomalies ◽  
Tectonic Activity ◽  
The Past ◽  
Tectonic Events ◽  
The City ◽  
Network Station ◽  
The Magnetic Field

Abstract. During the last twenty years a time-synchronized network of magnetometers has operated in Central Italy along the Apennine chain to monitor the magnetic field anomalies eventually related to the tectonic activity. At present time the network consists of five stations. In the past only few anomalies in the local geomagnetic field, possibly associated to earthquakes, has been observed, not least because the network area has shown a low-moderate seismic activity with the epicentres of the few events with Ml≥5 located away from the network station. During 2007 two Ml≈4 earthquakes occurred in proximity of two stations of the network. Here we report the magnetic anomalies in the geomagnetic field that could be related with these tectonic events. To better investigate these two events a study of ULF (ultra-low-frequency) emissions has been carried out on the geomagnetic field components H, D, and Z measured in L'Aquila Observatory during the period from January 2006 to December 2008. We want to stress that this paper refers to the period before the 2009 L'Aquila seismic sequence which main shock (Ml=5.8) of 6 April heavily damaged the medieval centre of the city and surroundings. At present time the analysis of the 2009 data is in progress.

scholarly journals A tectonomagnetic effect detected in Central Italy

1994 ◽  
Vol 37 (1) ◽  
Author(s):  
G. Mele ◽  
A. Meloni ◽  
P. Palangio
Keyword(s):  
Field Intensity ◽  
Geomagnetic Field ◽  
Central Italy ◽  
Volcanic Eruptions ◽  
Intensity Data ◽  
Absolute Level ◽  
Tectonic Events ◽  
Railway System ◽  
The Absolute ◽  
Geomagnetic Intensity

Significant variations in the absolute value of the geomagnetic field intensity related to tectonic events, as earthquakes and volcanic eruptions, have been observed in several cases. To detect such a tectonomagnetic effect related to seismic activity, a seismomagnetic network was installed by the Istituto Nazionale di Geofisica (ING) in the Abruzzi region (CentraI Italy), in July 1989. This area is being uplifting since the Pliocene. A logistic compromise between geophysical requirements and the electrified railway system tracks distribution led to the installation of five total magnetic field intensity data acquisition sites. From July 1989 to September 1992 geomagnetic intensity data were simultaneously recorded at all stations and compared to that recorded at the L'Aquila Observatory, located in the same area. A variation of about 10 nT in the absolute level of the geomagnetic field was measured at two stations located on the eastern side of the network. We suggest that the detected magnetic anomaly could resuIt from aseismic-changes in crustal stress during this time.

7. The Earth’s magnetic field

2018 ◽  
pp. 106-126
Author(s):  
William Lowrie
Keyword(s):  
Magnetic Field ◽  
Geomagnetic Field ◽  
Plate Tectonics ◽  
Magnetic Anomalies ◽  
Earth’S Magnetic Field ◽  
The Earth ◽  
Earth's Magnetic Field ◽  
Reversed Polarity ◽  
Harmful Radiation ◽  
The Magnetic Field

The Earth is surrounded by a magnetic field, which originates inside its molten core, and which for centuries has helped travellers to navigate safely across uncharted regions. The magnetic field protects life on the Earth by acting as a shield against harmful radiation from space, especially from the Sun. ‘The Earth’s magnetic field’ explains that the magnetic field at the Earth’s surface is dominantly that of an inclined dipole. The Sun’s deforming effect on the magnetic field outside the Earth is described, as are the magnetic fields of other planets. The magnetism of rocks forms the basis of palaeomagnetism, which explains how plate tectonics displaced the continents and produced oceanic magnetic anomalies whenever the geomagnetic field reversed polarity.

scholarly journals The Effect of Extremely Low Frequency Alternating Magnetic Field on the Behavior of Animals in the Presence of the Geomagnetic Field

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Natalia A. Belova ◽  
Daniel Acosta-Avalos
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Geomagnetic Field ◽  
Low Frequency ◽  
Alternating Magnetic Field ◽  
Magnetic Alignment ◽  
Resonance Model ◽  
Transduction Mechanisms ◽  
Alternating Magnetic Fields ◽  
The Magnetic Field

It is known that the geomagnetic field can influence animal migration and homing. The magnetic field detection by animals is known as magnetoreception and it is possible due to two different transduction mechanisms: the first one through magnetic nanoparticles able to respond to the geomagnetic field and the second one through chemical reactions influenced by magnetic fields. Another behavior is the magnetic alignment where animals align their bodies to the geomagnetic field. It has been observed that magnetic alignment of cattle can be disrupted near electric power lines around the world. Experimentally, it is known that alternating magnetic fields can influence living beings, but the exact mechanism is unknown. The parametric resonance model proposes a mechanism to explain that effect on living beings and establishes that, in the presence of a constant magnetic field, molecules associated with biochemical reactions inside cells can absorb resonantly alternating magnetic fields with specific frequencies. In the present paper, a review is made about animal magnetoreception and the effects of alternating magnetic fields in living beings. It is suggested how alternating magnetic fields can interfere in the magnetic alignment of animals and a general conclusion is obtained: alternating magnetic field pollution can affect the magnetic sensibility of animals.

scholarly journals Effect of Magnetic Anomalies on Very Low Frequency Discrete Emissions

1963 ◽  
Vol 16 (4) ◽  
pp. 588
Author(s):  
RL Dowden
Keyword(s):  
Field Line ◽  
Geomagnetic Field ◽  
Low Frequency ◽  
Magnetic Anomalies ◽  
Emission Frequency ◽  
Geomagnetic Field Line ◽  
Very Low Frequency ◽  
Cyclotron Radiation

The author has suggested (Dowden 1962) that. the spectrogram (frequency v. time) shapes of V.L.F. discrete emissions can be explained as Doppler-shifted cyclotron radiation from electrons spiralling along a geomagnetic field line away from the observer. The emission frequency is given by Eidman (1958),

scholarly journals La nave di pietra: The stone ship

2013 ◽  
Vol 5 (3) ◽  
pp. 75-89
Author(s):  
Zoran Lazović
Keyword(s):  
Architectural Design ◽  
Low Frequency ◽  
Many Worlds ◽  
The Third ◽  
The Past ◽  
The World ◽  
Time Trace ◽  
Earthly Paradise ◽  
The City ◽  
Urban Utopia

The World is permanently constructed and deconstructed. Is there an essential paradox of deconstructionism in creative works of architects? What does architectural design correspond to? Diary of a story where the narrator is his own interpreter: From an uncertain reminiscence and faded copies to the multiple new originals. Where was the architect's Babylon? The Group Portrait. Kriegs Insel in Plannen. The Expulsion from the Earthly Paradise. Block 24. The Culture Center of the Third Millennia. The Futuristic Approach to the Sava Amphitheatre of the Third Millennia. Urban Utopia: Homage to the City of Vukovar. The City of Hope. Cauchemare. Night work. Imago Mundi. Observatory of the Future? Wandering and the life at the low frequency. Belgrade Necrosis and the Death of Serbia. The Parallel of introspection, or the death of many worlds in front of us. Those who cannot see that dying will see some other worlds disappearing: their decay, dissolution, disappearance. Look into abyss of the past: for some trace, or for some more traces comparatively. The Architecture. Images. Fragments. Hybrids. Testimony of preserved images, objects, architectural compositions, iconographic fragments, montages, assemblages, art collages, menthol bricolages. The Reflection of major events and ideas: constantly changing and disappearing Context. Context of the big movements. Fashion. Trends. Mainstreams. Wars. Creative priorities and visions. The Anatomy Lesson: confronting your own designs and constructs, bonding, parsing, deconstruction, reminiscence and reconstruction, re-membering. Some trace of already obliterated existence and the inevitable disappearance. Is there an anticipation and a prediction of the events and disintegration, departure and return? What sorts of frames have had the images that were invisible at the time? Trace through the Specter of Derrida.

scholarly journals Radon and magnetic anomalies in the territory of the city Kyiv: environmental aspect

2021 ◽  
Vol 43 (1) ◽  
pp. 227-250
Author(s):  
M.I. Orlyuk ◽  
І.І. Onyshchuk ◽  
А.О. Romenets ◽  
A.V. Marchenko ◽  
P.O. Yatsevsky ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Low Frequency ◽  
Magnetic Anomalies ◽  
Radon Emanation ◽  
Dynamic Activity ◽  
Frequency Spectra ◽  
Environmental Aspect ◽  
Urgent Task ◽  
Orthogonal Systems ◽  
The City

Magnetic and radon anomalous fields are essential geophysical entities of environment which determine to a considerable degree its ecological state. Revelation of magnetic and radon anomalous zones is an urgent task for the studies of geo-environmental state of the territory and appraisal of its ecological safety. The greatest danger is produced by the areas where the faults are localized with radon anomalies related in the upper part of the Earth crust. For the territory of Kyiv geological characteristics of the studied area has been reviewd, schemes of regional and accompanying faults have been adjusted and completed, maps of module and anomalies of module of geomagnetic field induction as well as a scheme of radon anomalies in water and subsoil air have been elaborated. Connection between radon anomalies with faults and natural magnetic fields has been shown which consisted in correlation of radon anomalies with negative and small positive values of anomalous magnetic field and related to thick zones of fracturing with active fluidal-dynamic activity and the faults of diagonal and orthogonal systems being the zones of radon emanation into atmosphere. Radon anomalies in subsoil air are mainly controlled by Irpin-Borshchagivka, Pushcha-Vodytsya, Kyiv and Darnytsya faults of northwestern-northern strike and Petrivka-Pukhivka and Glevakha-Brovary faults of northwestern strike. For some stations of Kyiv metro the excess of environmental norms of magnetic field and radon anomalies has been determined which can be explained by constructive features of metro compartments and their location in fault zones. It has been shown that radon anomalies are spatially and temporally stabile and magnetic anomalies, especially in metro, are characterized by considerable changes of magnetic field in both low-frequency and high-frequency spectra of their variation. Combined analysis of the fault tectonic scheme, magnetic and radon anomalies will permit to find out environmentally hazardous zones in the territory of Kyiv and out of it more reasonably.

Possible Interactions Between Stent and Electromagnetic Field

2018 ◽  
Vol 3 (2) ◽  
pp. 48-51
Author(s):  
Cristian Barz ◽  
Marek Petters ◽  
Adam Dorsz ◽  
Przemysław Syrek
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Field ◽  
Bone Fractures ◽  
Electrical Power ◽  
Three Dimensional ◽  
Low Frequency ◽  
The Past ◽  
Magnetic Coils ◽  
The Impact ◽  
The Magnetic Field

Over the past years, an increase in the amount of the electromagnetic sources could be observed. Model presented in this article is limited to the impact of low frequency fields generated by the e.g. electrical power lines or magnetic coils in a bone fractures therapy. Particularly, the effect of the magnetic component of the electromagnetic field on stents will be evaluated. The conductivity of human tissues will be investigated. Yielded results will be used to simplify complicated, three-dimensional problem of the current distribution in stent branches, to one-dimensional one. The merits of the paper is proposing, implementing and using for analysis a numerical model of the stent in magnetic field. The impact of frequency and positioning of stent in the magnetic field will be investigated and current distributions found.

scholarly journals Modelling Secular Variation in the Southwest Pacific

2019 ◽  
pp. 1-20
Author(s):  
Maha Ali Alfheid ◽  
Mohana Faroug Attia
Keyword(s):  
Magnetic Field ◽  
Geomagnetic Field ◽  
Regional Model ◽  
Pacific Region ◽  
Spherical Cap ◽  
Southwest Pacific ◽  
The Past ◽  
Self Consistent ◽  
Spherical Cap Harmonic Analysis ◽  
The Magnetic Field

A spherical cap harmonic analysis (SCHA) model has been used to derive a high resolution regional model of the geomagnetic field in the southwest Pacific region over the past 400 years. Two different methods, a self-consistent and the gufm1 dipole method, have been used to fill in gaps in the available data. The data used in the analysis were largely measurements of the magnetic field recorded in ships logs on voyages of exploration in the region.  The method chosen for the investigation used a spherical cap of radius

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