HR: 16:45h
AN: AE14A-04    [Abstracts]
TI: Terrestrial Gamma-Ray Flashes: Statistical and Individual Properties from RHESSI
AU: * Smith, D M
EM: dsmith@scipp.ucsc.edu
AF: Physics Department and Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, 1156 High St, Santa Cruz, CA 95060 United States
AU: Grefenstette, B W
EM: brian@physics.ucsc.edu
AF: Physics Department and Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, 1156 High St, Santa Cruz, CA 95060 United States
AU: Lopez, L I
EM: astrolili@ssl.berkeley.edu
AF: Department of Physics and Astronomy, San Francisco State University, 1600 Holloway Ave, San Francisco, CA 94132
AU: Lin, R P
EM: rlin@ssl.berkeley.edu
AF: Physics Departmenta and Space Sciences Laboratory, University of California, Berkeley, 7 Gauss Wy, Berkeley, CA 94720 United States
AU: Cummer, S A
EM: cummer@ee.duke.edu
AF: Department of Electrical and Computer Engineering, Duke University, Box 90291, Durham, NC 27708 United States
AU: Holzworth, R H
EM: bobholz@washington.edu
AF: Department of Earth and Space Sciences, University of Washington, Room 230 Condon Hall, Seattle, WA 98195 United States
AU: Lay, E H
EM: erinlay@u.washington.edu
AF: Department of Earth and Space Sciences, University of Washington, Room 230 Condon Hall, Seattle, WA 98195 United States
AB: Over 500 terrestrial gamma-ray flashes (TGFs) have been found in data from the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) since its launch in February 2002. Each flash contains on the order of 30 photon counts, usually ranging from 20 keV to 20 MeV, lasts on the order of a millisecond, and is localized to approximately 1000 km. We will report on correlations (or lack thereof) between the intrinsic properties of the flashes (spectrum, duration, intensity) and contextual properties such as geographic latitude, magnetic latitude, local time, distance from the spacecraft (where accurate positions can be obtained from radio atmospherics), and terrain (inland, coastal, or deep ocean). A new exposure-corrected map will be presented, and compared with lightning data. Unusual or extreme cases of TGF activity will be individually examined.
UR: http://scipp.ucsc.edu/(tilde)dsmith/tgf/
DE: 2451 Particle acceleration
DE: 3304 Atmospheric electricity
DE: 3324 Lightning
SC: Atmospheric and Space Electricity [AE]
MN: Fall Meeting 2005