TY - GEN
T1 - On the continuing current duration of negative downward lightning measured in different regions
AU - Kereszy, Istvan
AU - Kereszy, Tamas
AU - Kern, John
AU - Pedro, Giovanna
AU - Comeau, Caroline
AU - Victorino, Paulo
AU - Fuzy, Dorottya
AU - Pomazi, Krisztian
AU - Bartos, Imre
AU - Guimarães, Miguel
AU - Simões, Listz
AU - Teixeira, Karine
AU - Barbosa, Gustavo
AU - Guimarães, Lucas
AU - Drumond, Matheus
AU - Arcanjo, Marcelo
AU - Bryant, Colleen
AU - Yebra, Marta
AU - Zhao, Li
AU - Cary, Geoff
AU - Boer, Matthias
AU - Nolan, Rachael
AU - Lawrey, Ryan
AU - Milner, Ailish
AU - Leavesley, Adam
AU - Jenkins, Meaghan
N1 - Publisher Copyright:
© 2024 IEEE, © VDE VERLAG GMBH ∙ Berlin ∙ Offenbach.
PY - 2024
Y1 - 2024
N2 - This paper presents a statistical study on the duration of negative downward lightning continuing current, using electric field waveforms recorded by a novel network deployed in three different regions: Central Florida (USA), Australian Capital Territory - ACT (Australia), and Minas Gerais (Brazil). Over 600 waveforms were analyzed, and the mean durations of the continuing current for Florida, ACT, and MG were found to be 142 ms, 122 ms, and 130 ms, respectively. The datasets were successfully fitted with lognormal distributions, and the parameters are detailed throughout the text. This paper highlights the important application of studying long-continuing-current events that are much longer than the 40 ms threshold, since they are the principal causes of lightning-ignited wildfires and lightning-caused power outages. One key finding of this study is that lightning can be classified into two distinct groups: (1) short lightning strikes with return stroke duration on the order of 100 µs that do not contain any continuing current and (2) long-continuing-current lightning with average durations that are a thousand times longer than those in the first group.
AB - This paper presents a statistical study on the duration of negative downward lightning continuing current, using electric field waveforms recorded by a novel network deployed in three different regions: Central Florida (USA), Australian Capital Territory - ACT (Australia), and Minas Gerais (Brazil). Over 600 waveforms were analyzed, and the mean durations of the continuing current for Florida, ACT, and MG were found to be 142 ms, 122 ms, and 130 ms, respectively. The datasets were successfully fitted with lognormal distributions, and the parameters are detailed throughout the text. This paper highlights the important application of studying long-continuing-current events that are much longer than the 40 ms threshold, since they are the principal causes of lightning-ignited wildfires and lightning-caused power outages. One key finding of this study is that lightning can be classified into two distinct groups: (1) short lightning strikes with return stroke duration on the order of 100 µs that do not contain any continuing current and (2) long-continuing-current lightning with average durations that are a thousand times longer than those in the first group.
UR - http://www.scopus.com/inward/record.url?scp=85215682641&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85215682641
T3 - ICLP 2024 - 37th International Conference on Lightning Protection
SP - 230
EP - 235
BT - ICLP 2024 - 37th International Conference on Lightning Protection
PB - VDE VERLAG GMBH
T2 - 37th International Conference on Lightning Protection, ICLP 2024
Y2 - 1 September 2024 through 7 September 2024
ER -