When the return-stroke current ceases, the flash, including various discharge processes within the cloud, may end. In that case, the lightning is called a single-stroke flash. On the other hand, if additional cloud charge is available, a continuous dart leader can propagate down the residual first-stroke channel and initiate another return stroke. During the time between the end of the first return stroke and the initiation of a dart leader, so-called J- and K-processes occur in the cloud. The J-process involves charge motion in the cloud on a tens of milliseconds time scale, while the K-process moves charge on a time scale ten times shorter. The dart leader has a peak current of 1 kA or more and lowers a total charge on the order of 1 C at a speed of about 3 x lo6 m/s. Some dart leaders become stepped leaders toward the end of their progression toward ground and do not follow the previous return stroke channel. Dart leaders and return strokes subsequent to the first are usually not branched. The time between successive strokes in a flash is usually several tens of milliseconds, but can be tenths of a second if a continuing current persists in the channel after a return stroke. Continuing currents are of the order of 100 A and represent a direct transfer of charge from cloud to ground [27]-[31]. Between 25 and 50% of all CG flashes contain a continuing current component [27]-[31].