Despite being one of the most familiar and widely recognized natural phenomena, lightning
remains relatively poorly understood. Even the most basic questions of how lightning is …

A new data mode and new analysis methods are used to detect Terrestrial Gamma‐ray
Flashes (TGFs) with the Fermi Gamma‐ray Burst Monitor (GBM) 10 times more frequently …

Lightning and thunderclouds are natural particle accelerators. Avalanches of relativistic
runaway electrons, which develop in electric fields within thunderclouds,, emit …

In this paper we report the first close, high‐resolution observations of downward‐directed
terrestrial gamma‐ray flashes (TGFs) detected by the large‐area Telescope Array cosmic …

Two types of high-energy events have been detected from thunderstorms. One is “terrestrial
gamma-ray flashes”(TGFs), sub-millisecond emissions coinciding with lightning discharges …

We report on a terrestrial gamma ray flash (TGF) that occurred on 15 August 2014 coincident
with an altitude‐triggered lightning at the International Center for Lightning Research and …

We investigate the development of metre long negative discharges and focus on their x-ray
emissions. We describe appearance, timing and spatial distribution of the x-rays. They …

Bursts of gamma ray showers have been observed in coincidence with downward
propagating negative leaders in lightning flashes by the Telescope Array Surface Detector …

In 2015, the Gamma-Ray Observation of Winter Thunderstorms (GROWTH) collaboration
launched a mapping observation campaign for high-energy atmospheric phenomena …

We present the first Fermi Space Telescope Gamma Ray Burst Monitor (GBM) catalog of
4,144 terrestrial gamma ray flashes (TGFs), detected since launch in 11 July 2008 through …