No. 50: Mar-Apr 1987
"Video recordings made from the space shuttle at night show large areas of lightning activity in clouds and some flashes that appear to be sympathetic with other flashes. Nearly simultaneous appearances of lightning as far apart as 100 km suggest that widely separated discharges may somehow be related."
(Ahmadjian, Mark, et al; "Video Pictures of Lightning Discharges Taken from the Space Shuttle," Eos, 67:891, 1986.)