be of various sizes, where the maximum
discharge and volume of floodwater spans orders of magnitudes. The largest
jökulhlaups in historic times, (e.g. outbursts from Mýrdalsjökull caused by
Katla eruptions), have had a maximum discharge on the
order of 100.000 m3s-1,
comparable to the discharge of the Amazon river. The rate of discharge increase
during the rising phase of a jökulhlaup is also variable
/volcanoes/grimsvotn-activity/faq/