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Sprites or red sprites are large-scale electric discharges that occur in the mesosphere, high above thunderstorm clouds, or cumulonimbus, giving rise to a varied range of visual shapes flickering in the night sky. They are usually triggered by the discharges of positive lightning between an underlying thundercloud and the ground.
The lightning that triggered it was in Polverigi, AN, Italy, at a distance of 285 km. Its strength, estimated at about 410 kA (kilo-Ampère), which is an order of magnitude stronger than a normal lightning (10 to 30 kilo-Ampère), generated an intense electromagnetic pulse. The red ring marks where the pulse hit the Earth's ionosphere.
Sheet lightning is cloud-to-cloud lightning that exhibits a diffuse brightening of the surface of a cloud, caused by the actual discharge path being hidden or too far away. The lightning itself cannot be seen by the spectator, so it appears as only a flash, or a sheet of light. The lightning may be too far away to discern individual flashes.
The rare form of lightning known as a sprite is only visible for milliseconds. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways ...
5. Dangerous Lightning: Thousands of cloud-to-ground lightning strikes per hour can also occur in a squall line. Occasional lightning strikes can continue for a half-hour or longer after the ...
Lightning is the major natural cause of wildfire, [175] estimated to cause 10% of forest fires worldwide. [176] Wildfire can contribute to climate change. [177] Because wildfires emit greenhouse gases, and also affect vegetation cover (which affects how much sunlight is reflected), a lightning wildfire feedback is possible.
Lightning; Mirages (including Fata Morgana) Monochrome Rainbow; Moon dog; Moonbow; Nacreous cloud/Polar stratospheric cloud; Rainbow; Sprite (lightning) Subsun; Sun dog; Tangent arc; Tyndall effect; Upper-atmospheric lightning, including red sprites, Blue jets, and ELVES; Water sky
Excessive Lightning; Derecho; Extreme wind (70 mph or greater) Downpours; Heavy rain; Flood, flash flood, coastal flooding; Hail; High winds – 93 km/h(58 mph) or higher. Lightning; Thundersnow, Snowsquall; Tornado; Windstorm (gradient pressure induced) Severe thunderstorm (hailstorm, downburst: microbursts and macrobursts)