HR: 14:10h
AN: AE13A-03    [Abstracts]
TI: Measurements of Current and Charge Transfer in Lightning Associated with RHESSI-Detected Terrestrial Gamma Ray Flashes
AU: Zhai, Y
EM: zhaiyh@ee.duke.edu
AF: Electrical and Computer Engineering Department, Duke University, Durham, NC 27708 United States
AU: * Cummer, S A
EM: cummer@ee.duke.edu
AF: Electrical and Computer Engineering Department, Duke University, Durham, NC 27708 United States
AU: Smith, D M
EM: dsmith@scipp.ucsc.edu
AF: Physics Department, University of California, Santa Cruz, CA 95064 United States
AU: Lopez, L I
EM: astrolili@ssl.berkeley.edu
AF: Department of Physics and Astronomy, San Francisco State University, San Francisco, CA 94132 United States
AB: We report observations and analysis of <30 kHz radio emissions (sferics) from lightning discharges associated with terrestrial gamma ray flashes (TGFs) recorded by the RHESSI satellite over the Caribbean and Americas during the summers of 2004 and 2005. Magnetic field sensors covering the bandwidth from 0.1 Hz to 30 kHz were operated continuously at Duke University during the summer of 2004, and 26 TGFs occurred in this region (between 1500 and 4000 km from the sensors) during system operation. Results from an analysis of event timing and lightning strength for these 2004 events are described [ Cummer et al., GRL, 32, 2005]. In the summer of 2005 the same sensors were operated at Duke University and a similar set of sensors were operated at Yucca Ridge, Colorado. This multisensor configuration enables determination of lightning location for these events and provides redundancy in the remote lightning parameter measurement. A summary of the general findings concerning the connection of TGFs to lightning events and the implications of the quantitative measurements is presented.
DE: 3304 Atmospheric electricity
DE: 3324 Lightning
DE: 6964 Radio wave propagation
SC: Atmospheric and Space Electricity [AE]
MN: Fall Meeting 2005