Laki Volcano Erupts in Iceland

Summary

Iceland in the eighteenth century remained a sparsely populated Danish dependency reliant on agriculture and fishing in a harsh subarctic climate. The Laki fissure system, part of the larger Grímsvötn volcanic complex, had shown prior activity but unleashed a massive event starting June 8, 1783. Over eight months, approximately 25 kilometers of fissures opened, releasing vast quantities of lava, toxic gases, and aerosols that devastated local pastures and livestock. The eruption killed roughly one-quarter of Iceland's population through famine and poisoning while spreading a sulfurous haze across Europe. Contemporary observers noted darkened skies and failed harvests far from the source.