[DOC] [TLE] Lightning - Wikipedia [PAR] Lightning is a sudden electrostatic discharge that occurs during an electrical 
storm. ... The science of lightning is called fulminology, and the fear of lightning is 
called .... When a stepped leader approaches the ground, the presence of 
opposite .... Ball lightning may be an atmospheric electrical phenomenon, the 
physical... [DOC] [TLE] Lightning - Electricalfun.com [PAR] Lightning's abrupt electric discharge is accompanied by the emission of visible ... 
usually begins when an invisible negatively charged stepped leader stroke is 
sent .... research produced a wealth of new information about lightning 
phenomena, ... An initial discharge, (or path of ionized air), called a "stepped 
leader", starts... [DOC] [TLE] Lightning, Sprites - Crystalinks [PAR] The science of lightning is called fulminology, and the fear of lightning is called ... 
usually begins when an invisible negatively charged stepped leader stroke is ... 
When the leader and streamer meet, the electrical discharge takes place up the 
... It occurs when the stepped leader forms at the positively charged cloud tops,... [DOC] [TLE] Check and uncheck as needed to select sections to print. Then ... [PAR] Lightning is a natural, short-lived, high-current electrical discharge in the 
atmosphere. Its path length is normally ... They include phenomena called red 
sprites, sprite halos, blue jets, gigantic jets, and elves. Blue jets, in ... They start 
near the base of a cloud as an invisible discharge called the stepped leader. The 
leader... [DOC] [TLE] Thunderstorm - Dictionary definition of Thunderstorm | Encyclopedia ... [PAR] Severe thunderstorms and their related phenomena produce significant human 
.... that is produced by a 100 million-volt electrical discharge in the atmosphere. 
..... It begins when an invisible stream of electrons, called a stepped leader, 
surges... [DOC] [TLE] Lightning Vocabulary - Storm Highway [PAR] Arc- A channel of ionized air with electric current flowing through it, usually used 
to ... Ball Lightning- A rare phenomenon described as a floating, illuminated 
sphere ... Branches- The parts of the stepped leader paths that are not part of the 
main ... Flash- Referring to an entire lightning discharge event from beginning to 
end. [DOC] [TLE] Lightning Sequence - HyperPhysics [PAR] Uman "The usual cloud-to- ground discharge probably begins as a local ... from 
the cloud to the ground is called a stepped leader... it moves to the ground in 
rapid, ... photographically obvserved diameter is due to a luminous electrical 
corona... [DOC] [TLE] Lightning - Van Nostrand's Scientific Encyclopedia - Wiley Online ... [PAR] Nov 17, 2006 ... Although lightning is an extremely common phenomenon of the lower ... lightning 
event, the phenomenon commences with what is called a stepped leader. ... 
Stepped leader and return stroke in cloud-to-earth lightning event. .... Sprites are 
now well-documented electrical discharges that occur high above... [DOC] [TLE] lightning & ball lighting - Agriculture Defense Coalition [PAR] When the leader and streamer meet, the electrical discharge takes place up the 
streamer into the cloud. ... It occurs when the stepped leader forms at the ... 
special type of intracloud lightning is commonly called an anvil crawler. ... 
Reports by scientists of strange lightning phenomena above storms date back to 
at least 1886,... [DOC] [TLE] ..      402 ..  ... [PAR] PHENOMENON OF LIGHTNING: NATURE, FORMATION AND TYPES. Historical 
... lightning was a discharge of static electricity, there was little improvement in 
theoretical ... the lightning discharge begins is not well known. Electric field .... 
lightning forms when negatively charged ions called the stepped leader rise up 
from. [DOC] [TLE] Lightning - Phenomenology [PAR] Lightning: A transient electrical discharge (ms), with high electrical current. (tens 
of kA), covering distances of ... Start and stop steps as the stepped leader 
progresses toward ground. Stepped Leader ... Essentially invisible to the human 
eye.  Produces an ... This luminous pulse of electrical energy is called the return 
stroke. [DOC] [TLE] Lightning - encyclopedia article - Citizendium [PAR] Oct 18, 2013 ... This abrupt electric discharge is accompanied by the emission of visible ... An 
initial discharge, or path of

Question: This phenomenon begins with an invisible electric discharge called a stepped leader
Answer: Lightning