One of the most cataclysmic events in recorded history took place in June of 1783 when a volcanic fissure opened up at Laki in Iceland. The emetic fury produced a prodigious belching of lava and gas on a scale seldom observed. The consequences were felt globally, from China and Japan to India to North Africa to Europe to North America. Iceland was devastated and around 25% of the population perished.
George Washington had something to say about it, as did Benjamin Franklin, then in Paris, and Gilbert White. See this for their accounts.
My plan is to publish a series of photographs on Laki and its craters (Lakagígar) later. This post features Tjarnagígur, a lovely crater lake in the area. In the second image, the sun briefly emerged to illuminate the subject.