Whistler echo trains triggered by energetic winter lightning.

ABSTRACT: Lightning generated electromagnetic impulses propagating in the magnetospheric plasma disperse into whistlers - several seconds long radio wave signals with decreasing frequency. Sometimes, multiple reflections form long echo trains containing many whistlers with increasing dispersion. On January 3, 2017, two necessary prerequisites - a pronounced lightning activity and a magnetospheric plasma duct - allowed for observations of a large number of whistler echo trains by the high-latitude station in Kannuslehto, Finland. Our investigation reveals that the duct existed for nearly eight hours. We show that causative lightning sferics arrived to the duct entry from three different winter thunderstorms: a small storm at the Norwegian coast, which produced energetic lightning capable to trigger e

SUBMITTER: Kolmasova I 

PROVIDER: S-EPMC11339424 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature