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Comparison Between High‐Speed Video Observation of Sprites and Broadband Sferic Measurements

https://doi.org/10.1029/2021GL093094

Ren, Huan ; Lu, Gaopeng ; Cummer, Steven A. ; Peng, Kang‐Ming ; Lyons, Walter A. ; Liu, Feifan ; Li, Xiao ; Wang, Yongping ; Zhang, Shoubao ; Cheng, Zhengwei ( May 2021 , Geophysical Research Letters)

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New World Meteorological Organization Certified Megaflash Lightning Extremes for Flash Distance (709 km) and Duration (16.73 s) Recorded From Space

https://doi.org/10.1029/2020GL088888

Peterson, Michael J. ; Lang, Timothy J. ; Bruning, Eric C. ; Albrecht, Rachel ; Blakeslee, Richard J. ; Lyons, Walter A. ; Pédeboy, Stéphane ; Rison, William ; Zhang, Yijun ; Brunet, Manola ; et al ( August 2020 , Geophysical Research Letters)

Abstract
Identification and validation of atmospheric extremes are essential to monitoring climate change, to addressing engineering and safety concerns, and to promoting technological advancement. An international World Meteorological Organization evaluation committee has critically adjudicated and recommended acceptance of two lightning megaflash events (horizontal mesoscale lightning discharges of >100 km in length) as new global extremes using analysis of Geostationary Lightning Mapper data. The world's greatest extent for an individual lightning flash is a single flash that covered a horizontal distance of 709 ± 8 km (441 ± 5 mi) across parts of southern Brazil on 31 October 2018. The greatest duration for a single lightning flash is 16.730 ± 0.002 s from a flash that developed continuously over northern Argentina on 4 March 2019.

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