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Jokulhlaup | John Seach
A Jokulhlaup is a glacial outburst caused by melt water from a subglacial volcano. Pronounced "yokel-lowp".
In exceptional cases they are comparable to ocean current flow rates in their output. Jokulhlaups can reactivate volcanic eruptions. Sedimentary landforms attributed to Jokulhlaups include dunes, bars and terraces.
Jokulhlaups occurred at Grimsvötn volcano (Icelend) in 1996 and 1937.
The largest Jokulhlaups known to have occurred in Iceland drained along the Jokulsa a Fjollum within the Northern Volcanic Zone.