scholarly journals Influence of a single lightning on the intensity of an air electric field and acoustic emission of near surface rocks

2012 ◽  
Vol 4 (1) ◽  
pp. 627-640
Author(s):  
S. E. Smirnov ◽  
Y. V. Marapulets
Keyword(s):  
Acoustic Emission ◽  
Electric Field ◽  
Characteristic Time ◽  
Electric Field Intensity ◽  
Lightning Discharge ◽  
Field Potential ◽  
Potential Gradient ◽  
Frequency Range ◽  
Near Surface ◽  
Electric Field Potential

Abstract. The effect of a single lightning discharge on electric field intensity in the near ground atmosphere was investigated. The effect appeared as a sharp fall of electric field potential gradient from 80 V m−1 up to −21 V m−1. The process of intensity recovery is described by flat capacitor model with characteristic time of recovery of 17 c. Simultaneously with electric field, the acoustic emission response in the near surface rocks on lightning discharge was registered in the frequency range of 6.5–11 kHz.

scholarly journals Influence of a single lightning discharge on the intensity of an air electric field and acoustic emission of near-surface rocks

Solid Earth ◽  
2012 ◽  
Vol 3 (2) ◽  
pp. 307-311 ◽  
Author(s):  
S. E. Smirnov ◽  
Y. V. Marapulets
Keyword(s):  
Acoustic Emission ◽  
Electric Field ◽  
Normal Level ◽  
Electric Potential ◽  
Characteristic Time ◽  
Lightning Discharge ◽  
Potential Gradient ◽  
Capacitor Discharge ◽  
Near Surface ◽  
Sharp Fall

Abstract. The effect was observed as a sharp fall of the electric potential gradient from +80 V m−1 down to –21 V m−1. After that the field returned to its normal level according to the formula of the capacitor discharge with 17 s characteristic time. Simultaneously, the response of the acoustic emission of surface rocks in the range of frequencies between 6.5 kHz and 11 kHz was evaluated.

scholarly journals Effects of the March 2015 solar eclipse on near-surface atmospheric electricity

2016 ◽  
Vol 374 (2077) ◽  
pp. 20150215 ◽  
Author(s):  
A. J. Bennett
Keyword(s):  
Cosmic Rays ◽  
Solar Eclipse ◽  
Atmospheric Electricity ◽  
Geomagnetic Latitude ◽  
Field Potential ◽  
Potential Gradient ◽  
Time Of Day ◽  
Atmospheric Effects ◽  
Near Surface ◽  
Electric Field Potential

Measurements of atmospheric electrical and standard meteorological parameters were made at coastal and inland sites in southern England during the 20 March 2015 partial solar eclipse. Clear evidence of a reduction in air temperature resulting from the eclipse was found at both locations, despite one of them being overcast during the entire eclipse. The reduction in temperature was expected to affect the near-surface electric field (potential gradient (PG)) through a reduction in turbulent transfer of space charge. No such effect could be unambiguously confirmed, however, with variability in PG and air–Earth current during the eclipse being comparable to pre- and post-eclipse conditions. The already low solar radiation for this latitude, season and time of day was likely to have contributed to the reduced effect of the eclipse on atmospheric electricity through boundary layer stability. The absence of a reduction in mean PG shortly after time of maximum solar obscuration, as observed during eclipses at lower geomagnetic latitude, implied that there was no significant change in atmospheric ionization from cosmic rays above background variability. This finding was suggested to be due to the relative importance of cosmic rays of solar and galactic origin at geomagnetic mid-latitudes. This article is part of the themed issue ‘Atmospheric effects of solar eclipses stimulated by the 2015 UK eclipse’.

scholarly journals Earth electric field negative anomalies as earthquake precursors

2020 ◽  
Vol 196 ◽  
pp. 01004
Author(s):  
Sergey Smirnov
Keyword(s):  
Electric Field ◽  
Field Potential ◽  
Potential Gradient ◽  
Cosmic Ray ◽  
Weather Conditions ◽  
Fair Weather ◽  
Earthquake Forecast ◽  
Electric Field Potential ◽  
Galactic Cosmic Ray ◽  
Cosmic Ray Flux

In fair weather conditions, electric field potential gradient in the near-ground air takes positive values. Negative anomalies occur under the influence of different ionizing processes such as galactic cosmic ray flux and radioactive gas emanation from the ground. In the conditions of calm geomagnetic state and fair weather, anomalies can be used for earthquake forecast. In the paper, the efficiency of earthquake forecast based on negative anomalies is under the study. It was obtained that the efficiency of such a forecast during any weather conditions is 10%.

scholarly journals Annual variation of atmospheric electricity diurnal variation maximum in Kamchatka

2021 ◽  
Vol 254 ◽  
pp. 01001
Author(s):  
Sergey Smirnov
Keyword(s):  
Electric Field ◽  
Diurnal Variation ◽  
Annual Variation ◽  
Atmospheric Electricity ◽  
Field Potential ◽  
Potential Gradient ◽  
Weather Conditions ◽  
Fair Weather ◽  
Local Conditions ◽  
Electric Field Potential

Atmospheric electric field diurnal variation measured in fair weather conditions over the ocean surface has a typical form which is called a unitary variation. It is associated with the global time and occurs simultaneously all over the planet. However, the diurnal variation, measured over the ground, depends on many local factors. The diurnal variation maximum of the electric field potential gradient, measured at Paratunka observatory, has the maximum close in time to the unitary variation maximum. In the paper we show that this maximum is determined by local conditions and is associated in time with the sunrise. The diurnal variation maximum of the electric field potential gradient, measured at Paratunka observatory in fair weather conditions, has annual variation coinciding with the annual variation of local sunrise.

scholarly journals Specific variations of the atmospheric electric field potential gradient as a possible precursor of Caucasus earthquakes

2009 ◽  
Vol 9 (4) ◽  
pp. 1221-1226 ◽  
Author(s):  
N. Kachakhidze ◽  
M. Kachakhidze ◽  
Z. Kereselidze ◽  
G. Ramishvili
Keyword(s):  
Electric Field ◽  
Field Potential ◽  
Potential Gradient ◽  
Original Method ◽  
Atmospheric Electric Field ◽  
The Caucasus ◽  
Caucasus Region ◽  
Electric Field Potential ◽  
The Subject ◽  
Precursors Of Earthquakes

Abstract. The subject of the research is the study of anomalous disturbances of the gradient of electric field potential of the atmosphere as possible precursors of earthquakes. In order to reveal such precursor Dusheti observatory (φ=42.05; λ=44.42) records of electric field potential's gradient (EFPG) of the atmosphere are considered for 41 earthquakes (M≥5.0) occurrence moments in the Caucasus region. Seasonal variations of atmospheric electric field potential gradient and inter overlapping influence of meteorological parameters upon this parameter are studied. Original method of "filtration" is devised and used in order to identify the effect of EFPG "clear" anomalies. The so-called "clear" anomalies are revealed from (−148.9 V/m) to 188.5 V/m limits and they are connected with occurrence moments of 29 earthquakes out of 41 discussed earthquakes (about 71%). "clear" anomalies manifest themselves in 11-day precursor window. Duration of anomalies is from 40 to 90 min.

scholarly journals Negative Anomalies of the Earth’s Electric Field as Earthquake Precursors

Geosciences ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 10
Author(s):  
Sergey Smirnov
Keyword(s):  
Electric Field ◽  
Field Potential ◽  
Potential Gradient ◽  
Earthquake Precursors ◽  
Electric Field Potential ◽  
The World ◽  
Air Ionization ◽  
The Impact

Anomalies of the electric field potential gradient have been observed in the near-ground air before earthquakes in different regions of the world. Such anomalies are likely caused by radon air ionization. In this study, the impact of this precursor was estimated according to continuous observations of the electric field in Kamchatka in 1997–2002.

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