Terrestrial gamma ray flash production by lightning current pulses
نویسندگان
چکیده
منابع مشابه
Lightning mapping observation of a terrestrial gamma‐ray flash
[1] We report the observation with the North Alabama Lightning Mapping Array (LMA) related to a terrestrial gamma‐ray flash (TGF) detected by RHESSI on 26 July 2008. The LMA data explicitly show the TGF was produced during the initial development of a compact intracloud (IC) lightning flash between a negative charge region centered at about 8.5 km above sea level (−22°C temperature level) a hig...
متن کاملConstraints on terrestrial gamma ray flash production from satellite observation
[1] Terrestrial gamma-ray flash (TGF) production has been modeled by several emission mechanisms. In spite of extensive studies of these mechanisms and the existing satellite data, significant uncertainties exist about the nature of the source. In this paper, we present a method to develop approximate product ion-mechanism-independent constraints on TGF production on the basis of Monte Carlo si...
متن کاملObservations of Terrestrial Gamma-Ray Flash Electrons
Terrestrial gamma-ray flash (TGF) emissions are predicted to be accompanied by energetic electron emissions. These electrons have been suggested to explain several anomalous TGF observations by the RHESSI and BATSE spacecraft. These electrons additionally provide a new window for study of TGFs as they carry additional information about the source through their pitch angle / arrival time distrib...
متن کاملSimultaneous observations of optical lightning and terrestrial gamma ray flash from space
[1] We present the very first simultaneous detection from space of a terrestrial gamma ray flash (TGF) and the optical signal from lightning. By fortuitous coincidence, two independent satellites passed less than 300 km from the thunderstorm system that produced a TGF that lasted 70 s. Together with two independent measurements of radio emissions, we have an unprecedented coverage of the event....
متن کاملProduction of terrestrial gamma-ray flashes by an electromagnetic pulse from a lightning return stroke
[1] Recent observations of terrestrial gamma-ray flashes (TGFs) (Smith et al., 2005) suggest the need for a new mechanism of TGF production. Consideration of relativistic runaway electron (RRE) avalanche driven by electromagnetic impulses (EMP) radiated by rapidly moving lightning return strokes indicates that TGFs can be produced by discharges with peak return stroke currents Ip > 450–700 kA w...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Space Physics
سال: 2009
ISSN: 0148-0227
DOI: 10.1029/2009ja014531