A new record has been captured for the longest distance of lightning, the UN’s weather agency said. A news agency reported that the single lightning flash stretched more than 700 kilometres across Brazil last year which is equivalent to the distance between Boston and Washington DC. The agency quoted the World Meteorological Organisation (WMO) committee of experts as saying that two new world records for the longest reported distance and the longest reported duration for a single lightning flash were set in Brazil and Argentina respectively.
The new record is double the size and duration of the previous record flashes. A lightning flash that developed continuously over northern Argentina on March 4, 2019 lasted for 16.73 seconds. Another one stretched more than 700 kilometres across southern Brazil on October 31 in 2019. This was equivalent to the distance between Boston and Washington in the US, or between London and Basel in Switzerland.
The previous megaflash distance record was 321 km in June 2007 across the US state of Oklahoma, and the previous continuous duration record was 7.74 seconds, in August 2012 in southern France, the agency was quoted as saying.