A lightning bolt that shot across the sky from East Texas to near Kansas City, Mo., during a 2017 thunderstorm has officially been named the longest ever recorded on Earth.

A lightning megaflash that spanned 515 miles from Dallas to Kansas City, Missouri, has set a new world record for the longest bolt. The Oct. 22, 2017, lightning bolt was part of a large cluster of thunderstorms that produced an impressive number of lightning strikes.

A megaflash is a lightning discharge of very long distance and/or duration that satellites can detect. A reanalysis of a megaflash from October 2017 has been deemed a new world record.