These photons are proposed as the source of terrestrial gamma-ray flashes.

Scientists have also detected energetic positrons and electrons produced by terrestrial gamma-ray flashes.

These terrestrial gamma-ray flashes (TGFs) are believed to occur all over the world at a rate of about 500 per day.

It is suggested that the antimatter positrons are formed in terrestrial gamma-ray flashes (TGF).

Rare terrestrial natural sources produce gamma rays that are not of a nuclear origin, such as lightning strikes and terrestrial gamma-ray flashes.

Terrestrial gamma-ray flashes (TGFs) are bursts of gamma rays in the Earth's atmosphere.

Dwyer has written and/or co-authored over 100 scientific research papers, more than 40 of them on lightning, terrestrial gamma-ray flashes, and x-rays from lightning.

A number of observations by space-based telescopes have revealed even higher energy gamma ray emissions, the so-called terrestrial gamma-ray flashes (TGFs).

Terrestrial gamma-ray flashes pose a challenge to current theories of lightning, especially with the discovery of the clear signatures of antimatter produced in lightning.

RREA has been hypothesized to be related to lightning initiation, terrestrial gamma-ray flashes, sprite lightning, and to spark development.

A two-day workshop covering the science of Terrestrial Gamma-ray Flashes (TGFs) will be held this summer in Huntsville.

Fermi telescope has observed and detected numerous terrestrial gamma-ray flashes and discovered that such flashes can produce 100 trillion positrons, far more than scientists had previously expected.

BATSE was the first instrument to detect Terrestrial Gamma-ray Flashes (TGFs), intense gamma-radiation from thunderstorms.

Terrestrial gamma-ray flashes were first discovered in 1991 by BATSE, or Burst and Transient Source Experiment, on the Compton Gamma-Ray Observatory, a NASA spacecraft.

GBM scientist Michael Briggs presented results from observations of Terrestrial Gamma-ray Flashes (TGFs) that show a signature of the annihilation of antimatter in the form of positrons hitting the spacecraft.

In 2003, he introduced the Relativistic Feedback Mechanism of Relativistic-runaway-electron avalanches, a new discharge mechanism in air, which explains how thunderclouds may generate very large flashes of gamma-rays called terrestrial gamma-ray flashes (TGFs).