scholarly journals Low-Frequency Electromagnetic Signals Observed before Strong Earthquakes

2019 ◽  
Author(s):  
Igor I. Rokityansky ◽  
Valeriia I. Babak ◽  
Artem V. Tereshyn
Keyword(s):  
Low Frequency ◽  
Strong Earthquakes ◽  
Electromagnetic Signals

PEMANFAATAN RADIASI ENERGI TEGANGAN 150 KV UNTUK LAMPU LED PENERANGAN JALAN

Jurnal Teknik ◽  
2018 ◽  
Vol 7 (1) ◽  
Author(s):  
Mauludi Manfaluthy
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
High Voltage ◽  
Low Frequency ◽  
Energy Utilization ◽  
World Health ◽  
Electromagnetic Signals ◽  
Health Organization ◽  
The Magnetic Field ◽  
Low Frequency Waves

WHO (World Health Organization) concludes that not much effect is caused by electric field up to 20 kV / m in humans. WHO standard also mentions that humans will not be affected by the magnetic field under  100 micro tesla and that the electric field will affect the human body with a maximum standard of 5,000 volts per meter. In this study did not discuss about the effect of high voltage radiation SUTT (High Voltage Air Channel) with human health. The research will focus on energy utilization of SUTT radiation. The combination of electric field and magnetic field on SUTT (70-150KV) can generate electromagnetic (EM) and radiation waves, which are expected to be converted to turn on street lights around the location of high voltage areas or into other forms. The design of this prototype works like an antenna in general that captures electromagnetic signals and converts them into AC waves. With a capacitor that can store the potential energy of AC and Schottky diode waves created specifically for low frequency waves, make the current into one direction (DC). From the research results obtained the current generated from the radiation is very small even though the voltage is big enough.Keywords : Radiance Energy, Joule Thief, and  LED Module.

scholarly journals Strong earthquakes can be predicted: a multidisciplinary method for strong earthquake prediction

2003 ◽  
Vol 3 (6) ◽  
pp. 703-712 ◽  
Author(s):  
J. Z. Li ◽  
Z. Q. Bai ◽  
W. S. Chen ◽  
Y. Q. Xia ◽  
Y. R. Liu ◽  
...  
Keyword(s):  
Earthquake Prediction ◽  
Strong Earthquake ◽  
Low Frequency ◽  
Abnormal Behavior ◽  
Frequency Range ◽  
Strong Earthquakes ◽  
Physical Mechanisms ◽  
Innovative Methods ◽  
The World ◽  
Infrasonic Wave

Abstract. The imminent prediction on a group of strong earthquakes that occurred in Xinjiang, China in April 1997 is introduced in detail. The prediction was made on the basis of comprehensive analyses on the results obtained by multiple innovative methods including measurements of crustal stress, observation of infrasonic wave in an ultra low frequency range, and recording of abnormal behavior of certain animals. Other successful examples of prediction are also enumerated. The statistics shows that above 40% of 20 total predictions jointly presented by J. Z. Li, Z. Q. Ren and others since 1995 can be regarded as effective. With the above methods, precursors of almost every strong earthquake around the world that occurred in recent years were recorded in our laboratory. However, the physical mechanisms of the observed precursors are yet impossible to explain at this stage.

scholarly journals Low frequency signal spectrum analysis for strong earthquakes

2012 ◽  
Vol 55 (1) ◽  
Author(s):  
Alexander Rozhnoi ◽  
Maria Solovieva ◽  
Pier Francesco Biagi ◽  
Konrad Schwingenschuh ◽  
Masashi Hayakawa
Keyword(s):  
Spectrum Analysis ◽  
Low Frequency ◽  
Signal Spectrum ◽  
Frequency Signal ◽  
Strong Earthquakes

scholarly journals Mesoscale convective systems as a source of electromagnetic signals registered by ground-based system and DEMETER (Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions) satellite

2021 ◽  
Vol 39 (2) ◽  
pp. 321-326
Author(s):  
Karol Martynski ◽  
Jan Blecki ◽  
Roman Wronowski ◽  
Andrzej Kulak ◽  
Janusz Mlynarczyk ◽  
...  
Keyword(s):  
Low Frequency ◽  
Field Measurements ◽  
Mesoscale Convective Systems ◽  
Atmospheric Conditions ◽  
Very High Frequency ◽  
Convective Systems ◽  
Mesoscale Convective ◽  
Electromagnetic Signals ◽  
Electro Magnetic ◽  
Atmospheric Discharges

Abstract. Mesoscale convective systems (MCSs) are especially visible in the summertime when there is an advection of warm maritime air from the west. Advection of air masses is enriched by water vapour, the source of which can be found over the Mediterranean Sea. In propitious atmospheric conditions, and thus significant convection, atmospheric instability or strong vertical thermal gradient leads to the development of strong thunderstorm systems. In this paper, we discuss one case of MCSs, which generated a significant amount of +CG (cloud-to-ground), −CG and intracloud (IC) discharges. We have focused on the ELF (extremely low frequency; < 1 kHz) electromagnetic field measurements, since they allow us to compute the charge moments of atmospheric discharges. Identification of the MCSs is a complex process, due to many variables which have to be taken into account. For our research, we took into consideration a few tools, such as cloud reflectivity, atmospheric soundings and data provided by PERUN (Polish system of the discharge localisation system), which operates in a very high frequency (VHF) range (113.5–114.5 MHz). Combining the above-described measurement systems and tools, we identified a MCS which occurred in Poland on 23 July 2009. Furthermore, it fulfilled our requirements since the thunderstorm crossed the path of the DEMETER (Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions) overpass.

scholarly journals Medicine detection with Low Frequency Electromagnetic Signals

2020 ◽  
Vol 17 ◽  
Keyword(s):  
Low Frequency ◽  
Molecular Structures ◽  
New Method ◽  
Pain Reliever ◽  
Non Invasive ◽  
Reliever Medication ◽  
Invasive Method ◽  
Electromagnetic Signals ◽  
Magnet Resonance

This paper presents a new, non-invasive method to detect molecular structures inside materials . There have been different methods to detect molecular structures such as Chromatography, Spectroscopy and Nuclear Magnet Resonance. A brief description of these methods is presented and how they are used. Then the new method is presented using an apparatus emitting low frequency electromagnetic signals. This paper presents how the frequencies are found, that are used to detect molecular structures. The method was applied for finding the frequencies of four pain-reliever medication. Discussion follows on the results. Conclusions are drawn and further work is proposed

scholarly journals PEMANFAATAN RADIASI ENERGI TEGANGAN 150 KV UNTUK LAMPU LED PENERANGAN JALAN

Kilat ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 51-55
Author(s):  
Redaksi Tim Jurnal
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
High Voltage ◽  
Low Frequency ◽  
Energy Utilization ◽  
World Health ◽  
Electromagnetic Signals ◽  
Health Organization ◽  
The Magnetic Field ◽  
Low Frequency Waves

WHO (World Health Organization) concludes that not much effect is caused by electric field up to 20 kV / m in humans. WHO standard also mentions that humans will not be affected by the magnetic field under 100 micro tesla and that the electric field will affect the human body with a maximum standard of 5,000 volts per meter. In this study did not discuss about the effect of high voltage radiation SUTT (High Voltage Air Channel) with human health. The research will focus on energy utilization of SUTT radiation. The combination of electric field and magnetic field on SUTT (70-150KV) can generate electromagnetic (EM) and radiation waves, which are expected to be converted to turn on street lights around the location of high voltage areas or into other forms.The design of this prototype works like an antenna in general that captures electromagnetic signals and converts them into AC waves. With a capacitor that can store the potential energy of AC and Schottky diode waves created specifically for low frequency waves, make the current into one direction (DC). From the research results obtained the current generated from the radiation is very small even though the voltage is big enough.

On the Possibility of Using ULF/ELF Electromagnetic Waves from Undersea Cables to Detect Airplanes Submerged in the Ocean

2021 ◽  
Vol 36 (5) ◽  
pp. 486-495
Author(s):  
Dallin Smith ◽  
Jamesina Simpson
Keyword(s):  
Electromagnetic Waves ◽  
Sensor Array ◽  
Detection System ◽  
Three Dimensional ◽  
Low Frequency ◽  
Background Level ◽  
Ocean Water ◽  
Electromagnetic Signals ◽  
Undersea Cables ◽  
Difference Time

The loss of Malaysian Flight on March 8, 2014, and the subsequent lengthy search for the aircraft highlights the need for an effective detection system for locating airplanes that have crashed into the ocean. The goal of this paper is to test the feasibility of detecting submerged airplanes using ultra-low frequency and/or extremely-low frequency electromagnetic signals generated by undersea cables located along the bottom of the ocean. The proposed detection system is tested using three-dimensional finite-difference time-domain (FDTD) modeling of the cable source, ocean water, ground, and submerged object (aircraft). The perturbation caused by the object is obtained for different positions of the object relative to the cable source. The magnitude of the perturbation is compared to the expected background level for a depth of 3 km into the ocean. A sensor array is proposed for detecting objects within several km of the cable.

Comparison of ultra-low frequency electromagnetic signals with aftershock activity during the 1989 Loma Prieta earthquake sequence

1993 ◽  
Vol 83 (2) ◽  
pp. 347-357 ◽  
Author(s):  
M. A. Fenoglio ◽  
A. C. Fraser-Smith ◽  
G. C. Beroza ◽  
M. J. S. Johnston
Keyword(s):  
Failure Process ◽  
Low Frequency ◽  
Background Level ◽  
Magnetic Activity ◽  
Aftershock Activity ◽  
Loma Prieta Earthquake ◽  
Negative Results ◽  
Field Fluctuations ◽  
Loma Prieta ◽  
Electromagnetic Signals

Abstract Ultra-low frequency (0.01 to 10.0 Hz) magnetic field fluctuations near the epicenter of the 1989 Loma Prieta earthquake rose sharply immediately before the earthquake following indications of increased disturbance during the previous 12 days. The magnetic activity remained much higher than the pre-earthquake background level for 6 weeks following the mainshock. These observations suggest a causal relationship between the earthquake failure process and the magnetic signals. A search for similar precursory electromagnetic signals associated with aftershocks of this earthquake yields negative results. Specifically, no correlation appears to exist between the amplitude of the electromagnetic activity and the frequency or magnitude of aftershocks following the mainshock. Either a “threshold” earthquake magnitude larger, in this case, than ML 5.5, may be necessary to generate precursory electromagnetic signals or the continued generation of magnetic signals related to the mainshock may have masked signals generated by the larger aftershocks.

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