Great Lightning Display Near Frankfurt, Germany
July 08, 2011
The photos above were taken during an amazing lightning display that lit up the skies near Frankfurt, Germany on the evening of June 4, 2011. With cloud-to-ground lightning, the base of a cumulonimbus cloud is typically positively charged while the ground surface and the top of the cloud, or thunderhead, are negatively charged. The opposite charges may induce lightning if the electric field is sufficient charged to overcome the atmosphere's considerable insulating properties. Even in powerful bolts like the ones shown above, the diameter of a lightning channel is only an inch or two (2.5 - 5 cm).
Photo details: Top - Camera Maker: Canon; Camera Model: Canon EOS 60D; Focal Length: 18.0mm; Aperture: f/5.0; Exposure Time: 18.000 s; ISO equiv: 100; Exposure Bias: none; Metering Mode: Matrix; White Balance: Auto; Flash Fired: No (enforced); Orientation: Normal; Color Space: sRGB. Bottom - same except: Aperture: f/4.0.