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The effect of a gamma ray flare on Schumann resonances

A. P. Nickolaenko, I. G. Kudintseva, O. Pechony, M. Hayakawa, Y. Hobara, Y. T. Tanaka
2012 Annales Geophysicae  
The gamma rays lowered the ionosphere over the dayside of the globe and modified the Schumann resonance spectra.  ...  We describe the ionospheric modification by the SGR 1806-20 gamma flare (27 December 2004) seen in the global electromagnetic (Schumann) resonance.  ...  We used the CATERPILLAR algorithm accomplishing the singular spectral analysis (SSA) (Danilov and Zhiglyavsky, 1997; Marple, 1987) , and Fig. 7 shows the stages of its application.  ... 
doi:10.5194/angeo-30-1321-2012 fatcat:f672j5uh3jf2db2c5yn2gvmeqm

Similar Spectral Power Densities Within the Schumann Resonance and a Large Population of Quantitative Electroencephalographic Profiles: Supportive Evidence for Koenig and Pobachenko

Kevin S. Saroka, David E. Vares, Michael A. Persinger, Lawrence M Ward
2016 PLoS ONE  
The intensity of the endogenous Schumann resonance was related to the 'best-of-fitness' of the traditional 4-class microstate model.  ...  Additional measurements demonstrated real-time coherence for durations approximating microstates in spectral power density variations between Schumann frequencies measured in Sudbury, Canada and Cumiana  ...  at the same time as direct measurements were taken for the Schumann Resonance locally and within 1 meter of the person are shown in Fig 7.  ... 
doi:10.1371/journal.pone.0146595 pmid:26785376 pmcid:PMC4718669 fatcat:cbiqqt77xjfd5n4baj37t5a424

Observation of 2nd Schumann eigenmode on Titan's surface

C. Béghin, G. Wattieaux, R. Grard, M. Hamelin, J. P. Lebreton
2013 Geoscientific Instrumentation Methods and Data Systems Discussions  
until the end of the measurements.  ...  with a much smaller amplitude compared to that measured before and 20 a few seconds after the impact, because the electric dipole is thought to have been stabilized ten seconds later almost horizontally  ...  The authors are grateful to the two anonymous reviewers who have pro-  ... 
doi:10.5194/gid-3-157-2013 fatcat:iol22lb6bbfbzb2rzdczhybis4

Hungarian national report on IAGA 2007–2010

L. Szarka, G. Sátori
2011 Acta Geodaetica et Geophysica Hungarica  
The research work covered the following topics: Connection of photospheric features with irradiance variations, spatial and temporal distribution of sunspot Coriolis motions, a new long-term variation  ...  position measurements.  ...  in the variation of Schumann resonance peak frequencies -Theory versus experiment.  ... 
doi:10.1556/ageod.46.2011.2.4 fatcat:yfn2bxfphbhe5ogowkg5wu43ha

Multifractal Characteristics of Cloud-to-Ground Lightning Intensity Observed in AMMA-CATCH Station (Northern Benin)

M. Agbazo, G. Koto N'Gobi, A. J. Adéchinan, B. Kounouhewa, B. E. Houngninou, A. Afouda
2020 Bulletin of Atmospheric Science and Technology  
Cloud-to-Ground (CG) lightning intensity time series recorded in northern Benin, during days of monsoon season (summer 2006), has been deeply explored using multifractal framework.  ...  These findings have allowed us to understand and characterize the complexity of lightning intensity structure in the network.  ...  Acknowledgments The authors would like to thank the African Monsoon Multidisciplinary Analysis (AMMA) project campaign for providing lightning data.  ... 
doi:10.1007/s42865-020-00004-7 fatcat:jmykkvtorjfrvgu4keigi6m4hi

1998 International Conference on Mathematical Methods in Electromagnetic Theory - MMET '98

1998 MMET Conference Proceedings. 1998 International Conference on Mathematical Methods in Electromagnetic Theory. MMET 98 (Cat. No.98EX114)  
the collaction of information.  ...  VA 22202-4302. end to the Office of Management and Budget, Paperwork Reduction Project (0704-0108), the dote needed, and completing and Headquarters Services, Directorate for DC 20503.  ...  This work was done with the help of Contract TH 606/96 of the National Science Foundation. Acknowledgment The authors would like to express our gratitude to Prof. B. Bhat and Prof. S. K.  ... 
doi:10.1109/mmet.1998.709792 fatcat:7bqb6g7rdvfxxjo2kmhjqivb2u

Observation of 2nd Schumann eigenmode on Titan's surface

C. Béghin, G. Wattieaux, R. Grard, M. Hamelin, J. P. Lebreton
2013 Geoscientific Instrumentation, Methods and Data Systems  
until the end of the measurements.  ...  with a much smaller amplitude compared to that measured before and a few seconds after the impact, because the electric dipole is thought to have been stabilized ten seconds later almost horizontally  ...  The authors want to acknowledge the many recognized as well as lowly HASI-PWA team members who made possible the successful achievement of this experiment. Edited by: L.  ... 
doi:10.5194/gi-2-237-2013 fatcat:csedhd6c6na2jolmlj7uypns7y

Thunderstorms, Lightning, Sprites and Magnetospheric Whistler-Mode Radio Waves

Devendraa Siingh, A. K. Singh, R. P. Patel, Rajesh Singh, R. P. Singh, B. Veenadhari, Madhuparna Mukherjee
2008 Surveys in geophysics  
The wide spectrum of electromagnetic waves generated during lightning discharges couple the lower atmosphere with the ionosphere/magnetosphere.  ...  Recent observations of optical phenomena above an active lightning discharge along with the availability of modern technology both for data collection and data analysis have renewed interest in the field  ...  The amplitude of the Schumann modes is similar at all places.  ... 
doi:10.1007/s10712-008-9053-z fatcat:54xz2qtyvvdjvhss4bgskhqpqu

Thunderstorms, lightning, sprites and magnetospheric whistler-mode radio waves [article]

Devendraa Siingh, A.K. Singh, R.P. Patel, Rajesh Singh, R.P. Singh, B. Veenadhari, M. Mukherjee
2009 arXiv   pre-print
The wide spectrum of electromagnetic waves generated during lightning discharges couple the lower atmosphere with the ionosphere/magnetosphere.  ...  Recent observations of optical phenomena above an active lightning discharge along with the availability of modern technology both for data collection and data analysis have renewed interest in the field  ...  The amplitude of the Schumann modes is similar at all places.  ... 
arXiv:0906.0429v1 fatcat:ullbheydxfh65jfxw2cdolad6m

Non-normality and nonlinearity in thermoacoustic instabilities

RI Sujith, MP Juniper, PJ Schmid
2016 International Journal of Spray and Combustion Dynamics  
The applicability of the tools from non-modal stability analysis are demonstrated with the help of a simple model of a Rjike tube.  ...  Recent progress in nonmodal stability analysis allows us to study the problem from a different perspective, by quantitatively describing the short-term behavior of disturbances.  ...  We thank the IAS, TUM for its generous and flexible support of this work. We are also grateful to Wolfgang Polifke for welcoming us to TUM and for his kind support.  ... 
doi:10.1177/1756827716651571 fatcat:o44suyurpfbmzfp2jf2bvylwne

Infrasound, human health, and adaptation: an integrative overview of recondite hazards in a complex environment

Michael A. Persinger
2013 Natural Hazards  
The typical amplitudes of the oscillations are within 1-50 lm, which is equivalent to the pressures of about 1 Pa and energies in the order of 10 -11 W m -2 .  ...  Infrasound displays a special capacity to affect human health and adaptation because its frequencies and amplitudes converge with those generated by the human body.  ...  The phenomena sometimes display diurnal variations; at other time, the amplitudes diminish or increase without the evidence of classical periodicities.  ... 
doi:10.1007/s11069-013-0827-3 fatcat:4mqxploocbfizdq6qhpa4yqvmi

Magnetohydrodynamic Oscillations in the Solar Corona and Earth's Magnetosphere: Towards Consolidated Understanding

V. M. Nakariakov, V. Pilipenko, B. Heilig, P. Jelínek, M. Karlický, D. Y. Klimushkin, D. Y. Kolotkov, D.-H. Lee, G. Nisticò, T. Van Doorsselaere, G. Verth, I. V. Zimovets
2016 Space Science Reviews  
and RHESSI) makes it very timely to survey the breadth of observations giving evidence for MHD oscillatory processes in solar and space plasmas, and state-of-the-art theoretical modelling.  ...  The successful commissioning within the past ten years of SDO, Hinode, STEREO and THEMIS spacecraft, in combination with matured analysis of data from earlier spacecraft (Wind, SOHO, ACE, Cluster, TRACE  ...  Precise measurements of the gradients of the spectral amplitude and phase along a small baseline allow one to exclude the influence of the source spectrum form and to reveal even relatively weak resonant  ... 
doi:10.1007/s11214-015-0233-0 fatcat:wvhyq67wkrd4piaohpdvgapf4q

Past, Present and Future of Active Radio Frequency Experiments in Space

A. V. Streltsov, J.-J. Berthelier, A. A. Chernyshov, V. L. Frolov, F. Honary, M. J. Kosch, R. P. McCoy, E. V. Mishin, M. T. Rietveld
2018 Space Science Reviews  
; optical instruments observe the visible-spectrum of optical emissions produced via suprathermal electron collisions with neutrals; radio receivers and spectrum analysers monitor the stimulated electromagnetic  ...  By modulating the transmitted power in time, space or frequency, the ionosphere can effectively become an antenna for the generation of lower frequency waves.  ...  127 Acknowledgements We This work was made possible by the ISSI funding of the international scince team "Past, Present and Future of Active Experiments in Space" and supported in part through CNES grant  ... 
doi:10.1007/s11214-018-0549-7 fatcat:zclepocmjvazvgbsj7mwpfckr4

Ionospheric D Region Remote Sensing Using ELF Sferic Group Velocity

M. Gołkowski, S. R. Sarker, C. Renick, R. C. Moore, M. B. Cohen, A. Kułak, J. Młynarczyk, J. Kubisz
2018 Geophysical Research Letters  
Unfortunately, this layer of the atmosphere is very difficult to measure directly. It is too high for airplanes and balloons, too low for satellites, and not dense enough for direct radio sounding.  ...  Applying the technique to sudden ionospheric disturbances shows that the group velocity increases in response to incidence of solar X-ray flux .  ...  Acknowledgments This work was supported by the National Science Foundation with awards AGS 1451210 and AGS 1254365 (CAREER) to the University of Colorado Denver and award AGS 1451142 to the Georgia Institute  ... 
doi:10.1029/2018gl080108 fatcat:o3meacrcurhlzkmin6bx2m67ym

A practical guide to event generation for prompt photon production with Sherpa

Frank Siegert
2017 Journal of Physics G: Nuclear and Particle Physics  
As a novel application a merged simulation of γγ and γγ+jet production at NLO accuracy is presented and compared to measurements from the ATLAS experiment.  ...  This article will give an overview of the different approaches used to simulate prompt photon production in the Sherpa event generator framework.  ...  Acknowledgements We are grateful to Stefan Höche and Steffen Schumann for many fruitful discussions on the subject and manuscript.  ... 
doi:10.1088/1361-6471/aa5f29 fatcat:6dyal7guh5divgpjoym7mmum2u
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