Long recovery VLF perturbations associated with lightning discharges

M. M. Salut, Mardina Abdullah, K. L. Graf, M. B. Cohen, B. R T Cotts, Sushil Kumar

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Long D-region ionospheric recovery perturbations are a recently discovered and poorly understood subcategory of early VLF events, distinguished by exceptionally long ionospheric recovery times of up to 20min (compared to more typical ∼1 min recovery times). Characteristics and occurrence rates of long ionospheric recovery events on the NWC transmitter signal recorded at Malaysia are presented. 48 long recovery events were observed. The location of the causative lightning discharge for each event is determined from GLD360 and WWLLN data, and each discharge is categorized as being over land or sea. Results provide strong evidence that long recovery events are attributed predominately to lightning discharges occurring over the sea, despite the fact that lightning activity in the region is more prevalent over land. Of the 48 long recovery events, 42 were attributed to lightning activity over water. Analysis of the causative lightning of long recovery events in comparison to all early VLF events reveals that these long recovery events are detectable for lighting discharges at larger distances from the signal path, indicating a different scattering pattern for long recovery events.

Original languageEnglish
Article numberA08311
JournalJournal of Geophysical Research: Space Physics
Volume117
Issue number8
DOIs
Publication statusPublished - 2012

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lightning
Lightning
recovery
perturbation
Recovery
ionospherics
Malaysia
lighting
D region
illuminating
transmitters
Transmitters
Lighting
water
scattering
occurrences
Scattering

ASJC Scopus subject areas

  • Space and Planetary Science
  • Geophysics

Cite this

Long recovery VLF perturbations associated with lightning discharges. / Salut, M. M.; Abdullah, Mardina; Graf, K. L.; Cohen, M. B.; Cotts, B. R T; Kumar, Sushil.

In: Journal of Geophysical Research: Space Physics, Vol. 117, No. 8, A08311, 2012.

Research output: Contribution to journalArticle

Salut, M. M. ; Abdullah, Mardina ; Graf, K. L. ; Cohen, M. B. ; Cotts, B. R T ; Kumar, Sushil. / Long recovery VLF perturbations associated with lightning discharges. In: Journal of Geophysical Research: Space Physics. 2012 ; Vol. 117, No. 8.
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