Scientists believe that the initial process for creating charge regions in thunderstorms involves small hail particles known as graupel. "When these graupel particles collide and bounce off of ...

Scientists think believe that the initial process for creating charge regions in thunderstorms involves small hail particles known as graupel that are around one quarter millimeter to a few ...

Researchers said rimed crystals, which are attached with cloud particles, and graupel characterize the snow that often falls in the Sea of Japan side of the Hokuriku to Tohoku regions of the ...