Does the lightning current go to zero between ground strokes? Is there a current “cutoff”?
Article first published online: 7 MAY 2014
©2014. American Geophysical Union. All Rights Reserved.
Geophysical Research Letters
Volume 41, Issue 9, pages 3266–3273, 16 May 2014
How to Cite
2014), Does the lightning current go to zero between ground strokes? Is there a current “cutoff”?, Geophys. Res. Lett., 41, 3266–3273, doi:10.1002/2014GL059601., , , , , , and (
- Issue published online: 2 JUN 2014
- Article first published online: 7 MAY 2014
- Accepted manuscript online: 21 APR 2014 06:44PM EST
- Manuscript Accepted: 14 APR 2014
- Manuscript Revised: 10 APR 2014
- Manuscript Received: 11 FEB 2014
- DARPA NIMBUS. Grant Number: HR0011-1-10-1-0061
- NASA. Grant Number: NNK12EA79P
- interstroke current;
- rocket-and-wire triggered lightning
At the end of 120 prereturn stroke intervals in 27 lightning flashes triggered by rocket-and-wire in Florida, residual currents with an arithmetic mean of 5.3 mA (standard derivation 2.8 mA) were recorded. Average time constants of the current decay following return strokes were found to vary between 160 µs and 550 µs, increasing with decreasing current magnitude. These results represent the most sensitive measurements of interstroke lightning current to date, 2 to 3 orders of magnitude more sensitive than previously reported measurements, and contradict the common view found in the literature that there is a no current interval. Possible sources of the residual current are discussed.