solar flare | up to 1032 ergs | up to 1016 g | scale of importance ranging from 3+ (largest area) to 1- (smallest area). | Sudden and short-lived brightening of a region of the solar chromosphere. | ionization in Earth's atmosphere may increase by several orders of magnitude producing aurorae, magnetic storms and radio interference. (electron density 1011 compared with 108 in solar quiet times). | in the vicinity of a sunspot | up to 1500 km s-1 | solar burst | solar event | sudden release of large amounts of energy in a relatively small volume above the solar surface. | as short as 300 s |