Investigating Dunedin whistlers using volcanic lightning

Antel, C.; Collier, A. B.; Lichtenberger, János; Rodger, Craig J.

doi:10.1002/2014gl060332

Cited by 8 publications

(5 citation statements)

References 25 publications

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“…In addition, the time of the daily peak of the whistler rate at Dunedin is in disagreement with the peak of lightning activity at the conjugate point (Rodger, Lichtenberger, et al, ). The results of Collier et al () suggest tropical Mexico, over 7,000 km from the conjugate point, as the source region, which, however, seem to contradict our understanding of the fundamental physics and also other observations (Antel et al, ; Morgan & Allcock, ).…”

Section: Introductionmentioning

confidence: 85%

The Source Regions of Whistlers

et al. 2019

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We present a new method for identifying the source regions of lightning‐generated whistlers observed at a fixed location. In addition to the spatial distribution of causative lightning discharges, we calculate the ratio of lightning discharges transmitted into ground detectable whistlers as a function of location. Our method relies on the time of the whistlers and the time and source location of spherics from a global lightning database. We apply this method to whistlers recorded at 15 ground‐based stations in the Automatic Whistler Detector and Analyzer Network operating between 2007 and 2018 and to located lightning strokes from the World Wide Lightning Location Network database. We present the obtained maps of causative lightning and transmission rates. Our results show that the source region of whistlers corresponding to each ground station is around the magnetic conjugate point of the respective station. The size of the source region is typically less than 2,000 km in radius with a small fraction of sources extending to up to 3,500 km. The transmission ratio is maximal at the conjugate point and decreases with increasing distance from it. This conforms to the theory that whistlers detected on the ground propagated in a ducted mode through the plasmasphere, and thus, the lightning strokes of their causative spherics must cluster around the footprint of the ducts in the other hemisphere. Our method applied resolves the whistler excitation region mystery that resulted from correlation‐based analysis methods, concerning the source region of whistlers detected in Dunedin, New Zealand.

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Section: Introductionmentioning

confidence: 85%

The Source Regions of Whistlers

et al. 2019

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“…Ezen kívül a whistlergyakoriság napi eloszlása is eltér a konjugált pont villámtevékenységének eloszlásától [Rodger et al, 2009b]. Collier et al [2010] szerint a konjugált ponttól több, mint 7000 kilométerre fekvő trópusi Mexikó a források helye, ez azonban ellentmond a terjedésről alkotott képünknek, valamint más megfigyeléseknek [Morgan & Allcock, 1956;Antel et al, 2014].…”

Section: Bevezetésunclassified

A plazmaszféra vizsgálata VLF elektromágneses hullámokkal

Koronczay¹

2019

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“…An impulsive current flowing in a lightning channel within a long ash plume can generate electromagnetic signals in the VLF range. It was found that electromagnetic signals originating in volcanic lightning discharges produced during the eruption of Mount Okmok volcano (Aleutian Islands) in 2008 traveled along the connecting magnetic field line to the opposite hemisphere and were recorded as whistlers at the conjugated point in Dunedin, New Zealand [Antel et al, 2014].…”

Section: Possibility Of Atmospheric Discharges On Marsmentioning

confidence: 99%

Anticipated plasma wave measurement onboard ExoMars 2020 surface platform

Kolmašová¹,

Santolı́k²,

Skalsky³

2018

Planetary Radio Emissions Viii

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The ExoMars 2020 Surface Platform will conduct environmental and geophysical measurements with the aim of studying the Martian surface and subsurface environment at the landing location. The Surface Platform instrumentation will include the Wave Analyzer Module (WAM) as a European contribution to the Russian-led Martian ground electromagnetic tool (MAIGRET) instrument. The wave analyzer module will be dedicated to measurements of magnetic field fluctuations in the frequency band from 100 Hz to 20 kHz. The scientific questions which we plan to address by measurements of the WAM have never been answered by direct measurements of the fluctuating magnetic fields in the appropriate range of frequencies directly on the surface of the planet. The immediate questions related to these targets are: 1. Can we observe electromagnetic radiation from electric discharges in the Martian dust storms? 2. Can we observe electromagnetic radiation propagating from the interplanetary space down to the surface of the planet?

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Investigating Dunedin whistlers using volcanic lightning

Cited by 8 publications

References 25 publications

The Source Regions of Whistlers

The Source Regions of Whistlers

A plazmaszféra vizsgálata VLF elektromágneses hullámokkal

Anticipated plasma wave measurement onboard ExoMars 2020 surface platform

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