Fermi Gamma-ray Burst Monitor (GBM) Detects Gamma-ray Flash from Tropical Storm Julio
The Fermi GBM instrument detected a Terrestrial Gamma-ray Flash (TGF) from Tropical Storm Julio, approximately two days before Julio became a hurricane. A TGF is a gamma-ray burst that is produced by the electric fields within thunderstorms. While there are an estimated over 1,000 TGF’s on any given day worldwide, members of the MSFC GBM Team are excited about this particular occurrence, as TGF detections from tropical storms are almost non-existent. Fortuitously, the orbit of the Fermi spacecraft passed almost directly over the center of Julio at the time of the detection. The full story is available at: http://phys.org/news/2014-08-nasa-hurricane-julio-emit-gamma-ray.html.
(Image credit: Michael Briggs/UAH)