Propagation of Lightning Current Studied by Remanent Magnetization

Sakai, Hideo; Yonezawa, Kaname; Kouno, Yoshihiro; Shindo, Takatoshi

doi:10.1541/ieejpes.133.694

Cited by 4 publications

(1 citation statement)

References 3 publications

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“…In theory, there may be differences in redox states of minerals affected by electric currents and impact shocks, however, the studies of this issue demonstrate that both may lead to reduction (Roberts et al (2019a)) and in general the results are rather inconclusive. The same situation is with magnetization of minerals by impacts and electric currents: it seems that both can lead to magnetization (Sakai et al (2013); Begnini et al (2013); Wasilewski (1973)), as well as demagnetization (Gattacceca et al (2010); Tikoo et al (2015)) -mostly due to intense heat -so the difference between the two is rather hard to pinpoint. The only obvious case where the magnetization could not have been caused by an impact and is most likely produced by electric currents is the sinuous rilles discussed in section 1.2.…”

Section: Mineralogical Evidencementioning

confidence: 96%

Crater Formation under Extreme Space Weather Conditions

Gable¹,

Bagashov²

2023

Preprint

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We consider an alternative hypothesis of crater formation -- through an electric discharge machining (EDM) of the celestial bodies' surfaces. The source of the energy and the current itself may lie in the plasma infalling on a celestial body (from an extremely strong solar outburst or a nearby supernova). This mechanism may have been even more important than impact cratering in the early Solar System, with potential implications to the history of the dynamics of the System itself and solar activity in particular. In this light, the conclusion that shocked and metamorphosed minerals found within crater sites are evidence of hypervelocity impacts might be reconsidered. There are ambiguities that remain among sources of mineralogical formations. This study is ongoing with details of investigations supporting a new approach to crater formation not yet exhausted. Apart from mineralogical analysis and theoretical considerations regarding the large scale crater formation, we present a description of experimental studies of EDM acting at low pressures. Experimental results are made with crude setups and could easily be replicated on a larger scale with valuable research potential, as there is a well understood relation between the crater size and the energy needed for its production.

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Section: Mineralogical Evidencementioning

confidence: 96%

Crater Formation under Extreme Space Weather Conditions

Gable¹,

Bagashov²

2023

Preprint

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Methodology of Measuring Minute Remanence up to Submicron Tesla Level

Minamitani

Wakaura

Yamada

et al. 2015

Journal of the Japan Society of Applied Electromagnetics and Me

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The remanence remaining in a volcanic rock is one of important measurement data in geophysics field. The sample of a rock has the remnant magnetization up to 10-9 T. Generally the remote magnetic fields measured by SQUID gradiometer presume the remanence of a rock as a sample. We propose a new methodology by measuring a magnetic field inside a cylindrical hole in the rotating sample. We could develop the simple measurement without shield system and high sensitivity sensor. The paper described the measurement system and the measured results of the rock. We could measure the remanence of a volcanic stone quarried from the volcanic rocks at Mt.Aso, Japan.

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