Analysis of Electric and Magnetic Lightning-Generated Wave Amplitudes Measured by the Van Allen Probes

J. F. Ripoll, T. Farges, D. M. Malaspina, E. H. Lay, G. S. Cunningham, G. B. Hospodarsky, C. A. Kletzing, J. R. Wygant

Research output: Contribution to journalArticle

Abstract

We provide a statistical analysis of both electric and magnetic field wave amplitudes of very low frequency lightning-generated waves (LGWs) based on the equivalent of 11.5 years of observations made by the Van Allen Probes encompassing ~24.6 × 106 survey mode measurements. We complement this analysis with data from the ground-based World Wide Lightning Location Network to explore differences between satellite and ground-based measurements. LGW mean amplitudes are found to be low compared with other whistler mode waves (1 ± 1.6 pT and 19 ± 59 μV/m). Extreme events (1/5,000) can reach 100 pT and contributes strongly to the mean power below L = 2. We find excellent correlations between World Wide Lightning Location Network-based power and wave amplitudes in space at various longitudes. We reveal strong dayside ionospheric damping of the LGW electric field. LGW amplitudes drop for L < 2, contrary to the Earth's intense equatorial lightning activity. We conclude that it is difficult for equatorial LGW to propagate and remain at L < 2.

Original languageEnglish (US)
Article numbere2020GL087503
JournalGeophysical Research Letters
Volume47
Issue number6
DOIs
StatePublished - Mar 28 2020

Keywords

  • WWLLN database
  • electric wave power
  • lightning-generated waves
  • magnetic wave power
  • radiation belts

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    Ripoll, J. F., Farges, T., Malaspina, D. M., Lay, E. H., Cunningham, G. S., Hospodarsky, G. B., Kletzing, C. A., & Wygant, J. R. (2020). Analysis of Electric and Magnetic Lightning-Generated Wave Amplitudes Measured by the Van Allen Probes. Geophysical Research Letters, 47(6), [e2020GL087503]. https://doi.org/10.1029/2020GL087503