In 1783 the Laki fissure system, southwest of the Vatnajokull glacier in Iceland, produced one of the largest lava flow eruptions in historic times. About 15 cubic kilometers of basaltic magma was erupted from the 27 km long fissures from May 1783 to May 1785. The resulting lava flow flooded an area of 565 square kilometers and produced a large number of scoria and tuff cones along the fissure. Two churches were overun and more than 30 farms were partially or completely destroyed.      
       
Eruption Impacts: The 1783 Laki eruption had a devastating effect on the Icelandic population. During peak episodes of the event, large portions of Iceland were covered by fine volcanic ash and haze (gases and aerosols).
Large release of gas during the eruption produced a dry fog or haze over Iceland and parts of Europe  
Grass growth stunted and fish catches decreased dramatically
50% of Iceland's grazing livestock died in less than one year
Total Icelandic population decreased by about 25% following the eruption
     
   
    View looking to the southwest along the Laki fissure system