Fulgurite - Sand hit by lightning. This picture is not Fulgurite by the way.This is a stick with wet sand on it.Fulgurite is usually found in the ground where lightning has struck and is usually very small glass tubules.
PRO Ryan McGinnis Burwell Monster A vertical shot of the monster HP supercell that pummeled the open range north of Burwell, Nebraska, June This storm had several rain-wrapped tornadoes earlier in the storm's lifecycle.
A minor geomagnetic storm is in progress on April and this is sparking bright auroras around the Arctic Circle. A family of "aurora addicts" traveling through Boden, Sweden, took this picture of the display.