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Lightning at Jupiter pulsates with a similar rhythm as in-cloud lightning at Earth
Journal article   Open access   Peer reviewed

Lightning at Jupiter pulsates with a similar rhythm as in-cloud lightning at Earth

Ivana Kolmašová, Ondřej Santolík, Masafumi Imai, William S Kurth, George B Hospodarsky, John E P Connerney, Scott J Bolton and Radek Lán
Nature communications, Vol.14(1), pp.2707-2707
05/23/2023
DOI: 10.1038/s41467-023-38351-6
PMCID: PMC10205726
PMID: 37221170
url
https://doi.org/10.1038/s41467-023-38351-6View
Published (Version of record) Open Access

Abstract

Our knowledge about the fine structure of lightning processes at Jupiter was substantially limited by the time resolution of previous measurements. Recent observations of the Juno mission revealed electromagnetic signals of Jovian rapid whistlers at a cadence of a few lightning discharges per second, comparable to observations of return strokes at Earth. The duration of these discharges was below a few milliseconds and below one millisecond in the case of Jovian dispersed pulses, which were also discovered by Juno. However, it was still uncertain if Jovian lightning processes have the fine structure of steps corresponding to phenomena known from thunderstorms at Earth. Here we show results collected by the Juno Waves instrument during 5 years of measurements at 125-microsecond resolution. We identify radio pulses with typical time separations of one millisecond, which suggest step-like extensions of lightning channels and indicate that Jovian lightning initiation processes are similar to the initiation of intracloud lightning at Earth.

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