Results 31 to 40 of about 7,402 (230)

Initiation processes of return strokes in rocket‐triggered lightning [PDF]

Journal of Geophysical Research: Atmospheres, 2013
AbstractUsing a high speed optical imaging system operated at a time resolution of either 10 ns or 100 ns, we have documented the initiation process of 14 return strokes in four rocket‐triggered lightning flashes. Of the 14 strokes, nine occurred following dart leaders and five following dart‐stepped leaders. The return strokes are found to initiate at
D. Wang, N. Takagi, W. R. Gamerota, M. A. Uman, J. D. Hill, D. M. Jordan   +5 more
openaire   +1 more source

Measurements of x‐ray emission from rocket‐triggered lightning [PDF]

Geophysical Research Letters, 2004
We report measurements of the x‐ray emission from rocket‐triggered lightning, made during the summer of 2003, using four instruments placed between 15 and 40 m from the lightning channels. X‐rays were measured 0–80 μs just prior to and at the beginning of 73% of the 26 return strokes observed. The emission was composed of multiple, very brief bursts of
J. R. Dwyer, H. K. Rassoul, M. Al‐Dayeh, L. Caraway, B. Wright, A. Chrest, M. A. Uman, V. A. Rakov, K. J. Rambo, D. M. Jordan, J. Jerauld, C. Smyth   +11 more
openaire   +1 more source

TETRA Observation of Gamma Rays at Ground Level Associated with Nearby Thunderstorms [PDF]

, 2013
Terrestrial Gamma ray Flashes (TGFs) -- very short, intense bursts of electrons, positrons, and energetic photons originating from terrestrial thunderstorms -- have been detected with satellite instruments.
Case, Gary L., Cherry, Michael L., Granger, Douglas, Guzik, T. Gregory, Ringuette, Rebecca, Stewart, Michael, Wefel, John P.   +6 more
core   +1 more source

Observations on Electromagnetic and X-ray Radiations from Leader-return-stroke Process in Rocket-triggered Lightning

应用气象学报
The negative dart leader-return-stroke process, accompanied by broadband electromagnetic radiation and high-energy emissions, represents a key focus in lightning physics. During the summer of 2023, collaborative observations of rocket-triggered lightning
Li Xiao, Zhang Xiong, Li Peng, Fan Yanfeng, Wang Yuan, Li Xiaoqiang, Cao Baofeng, Lü Weitao   +7 more
doaj   +1 more source

Downward Positive Leader Propagation Modes and Their Effects in Positive Cloud‐to‐Ground Lightning Characteristics

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 9, 16 May 2026.
Abstract The return stroke in a cloud‐to‐ground (CG) flash is initiated when the downward leader either reaches the ground or connects with an upward leader from a grounded structure. Unlike negative downward leaders, which typically propagate in a highly branched manner, downward positive leaders (DPLs) can propagate either in a branched or unbranched
Marcelo M. F. Saba, Diego R. R. da Silva, Ivan T. Cruz, Tagianne P. da Silva, Paola B. Lauria, José Claudio O. Silva, Gabriel S. Diniz, Tom A. Warner, Rasha U. Abbasi, João Carlos M. Alves, Giovane B. Suss, Miguel B. Guimarães Neto, Listz S. Araujo, Ny T. Kieu   +13 more
wiley   +1 more source

Upgraded Low-Frequency 3D Lightning Mapping System in North China and Observations on Lightning Initiation Processes

Remote Sensing
The three-dimensional (3D) low-frequency lightning mapping system (LF-LMS) in north China has been updated. The lightning electric field derivative (dE/dt) sensor and continuous acquisition mode has been newly designed to ensure a capability of entire ...
Mingyuan Liu, Xiushu Qie, Zhuling Sun, Rubin Jiang, Hongbo Zhang, Ruiling Chen, Shanfeng Yuan, Yu Wang, Xiangke Liu   +8 more
doaj   +1 more source

Characteristics of broadband lightning emissions associated with terrestrial gamma ray flashes [PDF]

, 2011
To characterize lightning processes that produce terrestrial gamma ray flashes (TGFs), we have analyzed broadband (
Cummer, Steven A., Grefenstette, Brian W., Han, Feng, Li, Jingbo, Lu, Gaopeng, Smith, David M.   +5 more
core   +2 more sources

Microspherules formed by lightning strikes

Meteoritics &Planetary Science, Volume 61, Issue 5, Page 743-767, May 2026.
Abstract Natural microspherules are formed by high‐temperature processes and are present throughout the geologic record to the present day. We report the discovery of large numbers of microspherules recovered from a rock pavement in the Pilbara region, Western Australia.
M. R. Boyd, M. J. Genge, A. G. Tomkins
wiley   +1 more source

Barriers to Indigenous Fire Stewardship on Karuk Lands

Ecology and Evolution, Volume 16, Issue 4, April 2026.
This paper examines the Karuk Tribe's experiences with settler colonialism and their efforts to restore cultural fire stewardship in the wake of the 2020 Slater Fire, which burned 157,000 acres of Karuk ancestral territory. Through a collaborative, community‐engaged case study approach, we conducted 13 interviews with Karuk Tribal members and staff to ...
Caitlyn Cruz, Kathy McCovey, Gregory Russell, Dominique David‐Chavez, Lindsey Schneider, Courtney Schultz   +5 more
wiley   +1 more source

Damage to metallic samples produced by measured lightning currents [PDF]

, 1991
A total of 10 sample disks of 2024-T3 aluminum and 4130 ferrous steel were exposed to rocket-triggered lightning currents at the Kennedy Space Center test site.
Fisher, Richard J., Schnetzer, George H.
core   +1 more source