scholarly journals Disturbances of the Natural Electric Field in the Atmosphere Before Technogenic Earthquakes

2018 ◽  
Vol 41 ◽  
pp. 01015
Author(s):  
Dmitry Sirota ◽  
Vadim Ivanov
Keyword(s):  
Electric Field ◽  
Present Article ◽  
Direct Problem ◽  
Convincing Evidence ◽  
Earthquake Forecasting ◽  
Short Term ◽  
The Earth ◽  
Natural Electric Field ◽  
Electric Cables ◽  
Technogenic Earthquake

Modern seismology attaches great importance to the methods of short-term earthquake forecasting. One of these methods is a method based on the registration of disturbances of the atmospheric electric field and the field arising in rocks before earthquakes. Until now, this problem is discussed at the level of hypotheses. The mechanism of perturbations is unclear and the literature does not provide any convincing evidence of the explanation of the observed phenomena – flashes and columns of light, breakdown of electric cables in the earth a few hours before the earthquake and other phenomena. In the present article on the basis of the phenomenon of fast cracks loading discovered in the nineties of the last century [1] the explanation of these phenomena is offered by the solution of a direct problem about an electric field of the hearth of technogenic earthquake in the atmosphere.

Short term earthquake prediction from measurements of the electric field of the earth

1996 ◽  
pp. 139-154
Author(s):  
Panayiotis Varotsos ◽  
Konstantin Alexopoulos ◽  
Maria Lazaridou
Keyword(s):  
Electric Field ◽  
Earthquake Prediction ◽  
Short Term ◽  
The Earth

scholarly journals Magnetospheric response of two types in PSc geomagnetic pulsations to interaction with interplanetary shock waves

2018 ◽  
Vol 4 (3) ◽  
pp. 68-83
Author(s):  
Владимир Пархомов ◽  
Vladimir Parhomov ◽  
Наталия Бородкова ◽  
Natalia Borodkova ◽  
Александр Яхнин ◽  
...  
Keyword(s):  
Shock Wave ◽  
Shock Waves ◽  
Electric Field ◽  
Interplanetary Shock ◽  
Resonance Structure ◽  
Geomagnetic Pulsations ◽  
Short Term ◽  
The Earth ◽  
Interplanetary Shock Wave ◽  
Broadband Pulse

Using the June 22, 2015 event as an example, we present new data confirming the presence of a precursor of the sudden magnetic impulse caused by a powerful interplanetary shock wave (ISW). The precursor in the form of a train of oscillations (broadband pulse) with a falling frequency in the range 0.25÷11 Hz with a duration of ~20 s, which had a spectral resonance structure, was recorded globally by a network of induc-tion magnetometers at 18:33:27 UT. No significant phase delays of the signals were detected in four fre-quency bands at widely spaced observatories. It is sug-gested that the impulse can be excited in the Earth — ionosphere waveguide by a pulsed electric field which occurs in the ionosphere due to the short-term impact of ISW on the magnetosphere.

scholarly journals Magnetospheric response of two types in PSc geomagnetic pulsations to interaction with interplanetary shock waves

2018 ◽  
Vol 4 (3) ◽  
pp. 52-66
Author(s):  
Владимир Пархомов ◽  
Vladimir Parhomov ◽  
Наталия Бородкова ◽  
Natalia Borodkova ◽  
Александр Яхнин ◽  
...  
Keyword(s):  
Shock Wave ◽  
Shock Waves ◽  
Electric Field ◽  
Interplanetary Shock ◽  
Resonance Structure ◽  
Geomagnetic Pulsations ◽  
Short Term ◽  
The Earth ◽  
Interplanetary Shock Wave ◽  
Broadband Pulse

Using the June 22, 2015 event as an example, we present new data confirming the presence of a precursor of the sudden magnetic impulse caused by a powerful interplanetary shock wave (ISW). The precursor in the form of a train of oscillations (broadband pulse) with a falling frequency in the range 0.25÷11 Hz with a duration of ~20 s, which had a spectral resonance structure, was recorded globally by a network of induction magnetometers at 18:33:27 UT. No significant phase delays of the signals were detected in four frequency bands at widely spaced observatories. It is suggested that the impulse can be excited in the Earth – ionosphere waveguide by a pulsed electric field which occurs in the ionosphere due to the short-term impact of ISW on the magnetosphere.

scholarly journals Response to Zöller et al.'s critique on “Potential short‐term earthquake forecasting by farm‐animal monitoring”

Ethology ◽  
2021 ◽  
Vol 127 (3) ◽  
pp. 307-308
Author(s):  
Martin Wikelski ◽  
Uschi Mueller ◽  
Paola Scocco ◽  
Andrea Catorci ◽  
Lev V. Desinov ◽  
...  
Keyword(s):  
Farm Animal ◽  
Earthquake Forecasting ◽  
Short Term ◽  
Animal Monitoring

scholarly journals Improving of electrical channels for magnetotelluric sounding instrumentation

2015 ◽  
Vol 4 (2) ◽  
pp. 149-154 ◽  
Author(s):  
A. M. Prystai ◽  
V. O. Pronenko
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Deep Structure ◽  
Experimental Tests ◽  
Magnetotelluric Sounding ◽  
Earth’S Crust ◽  
Geomagnetic Variations ◽  
The Earth ◽  
Wide Range ◽  
Earth's Crust

Abstract. The study of the deep structure of the Earth's crust is of great interest for both applied (e.g. mineral exploration) and scientific research. For this the electromagnetic (EM) studies which enable one to construct the distribution of electrical conductivity in the Earth's crust are of great use. The most common method of EM exploration is magnetotelluric sounding (MT). This passive method of research uses a wide range of natural geomagnetic variations as a powerful source of electromagnetic induction in the Earth, producing telluric current variations there. It includes the measurements of variations of natural electric and magnetic fields in orthogonal directions at the surface of the Earth. By this, the measurements of electric fields are much more complicated metrological processes, and, namely, they limit the precision of MT prospecting. This is especially complicated at deep sounding when measurements of long periods are of interest. The increase in the accuracy of the electric field measurement can significantly improve the quality of MT data. Because of this, the development of a new version of an instrument for the measurements of electric fields at MT – both electric field sensors and the electrometer – with higher levels relative to the known instrument parameter level – was initiated. The paper deals with the peculiarities of this development and the results of experimental tests of the new sensors and electrometers included as a unit in the long-period magnetotelluric station LEMI-420 are given.

scholarly journals Does Deep-Underground Storage Stimulate the Germination of Canola (Brassica napus L.) Seed?

2020 ◽  
Vol 12 (6) ◽  
pp. 23
Author(s):  
Yuxin He ◽  
Chao Liu ◽  
Heping Xie ◽  
Jingchen Wang ◽  
Yang Wang ◽  
...  
Keyword(s):  
Seed Storage ◽  
Biomass Accumulation ◽  
Underground Storage ◽  
Total Biomass ◽  
Short Term ◽  
Hypocotyl Length ◽  
Brassica Napus L ◽  
The Earth ◽  
Deep Underground ◽  
Compensatory Effect

Agriculture is a crucial area to be considered when exploring and exploiting the use of deep-underground space. We investigated the feasibility of deep-underground seed storage by keeping canola seed in either envelopes or sealed packages at four depths below the Earth’s surface (0, 240, 690, and 1410 m) at a gold mine in northeastern China. We studied the effects of storage depth and duration by conducting germination tests with the stored seed. The results showed that the rate of germination was reduced in seed stored at deeper levels and was also lower at all depths after a more prolonged period of storage. Seeds from sealed packages exhibited better resistance to the deep-underground environment than seeds kept in envelopes. However, measurements of hypocotyl lengths and biomass accumulation revealed that the germination of seeds stored in deep-underground was initially inhibited but recovered well compared with the control as the storage depth increased. The total biomass of the hypocotyl increased as the depth of seed storage deepened, indicating the existence of a compensatory effect on seed germination. The findings suggest that short-term deep-underground storage of seeds in sealed packages would improve the germination performance of cultivated canola in terms of the hypocotyl length and biomass accumulation and might be considered as a pre-sowing strategy.

scholarly journals The Acceleration of Outer-Belt Electrons by Localized Electric Fields

2021 ◽  
Vol 61 (4) ◽  
pp. 477-482
Author(s):  
A. P. Kropotkin
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Relativistic Electrons ◽  
Strong Component ◽  
Short Term ◽  
Energetic Electrons ◽  
Geomagnetic Tail ◽  
Night Side ◽  
Bursty Bulk Flows

Abstract To explain the populations of the outer-belt energetic electrons, including relativistic electrons, that sporadically appear in the magnetosphere, a mechanism was proposed long ago for the acceleration of those electrons by short-term bursts of the electric field, which appear on the night side during substorm disturbances (Kropotkin, 1996). This mechanism can be substantially specified if the modern concepts of bursty bulk flows in the geomagnetic tail, the occurrence of dipolarization fronts, and the excitation of localized field-aligned-resonant poloidal Alfvén oscillations involving a strong component of the electric field in the dawn-dusk direction are taken into account.

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