Temperatures Increased in Europe During the Laki Eruption
"Deviation of the 1783 July surface temperatures from the 1768–1798 mean. Numbers are given in degrees centigrade and the distribution of the anomaly is indicated by isotherms, drawn at 1oC intervals" (Figure 8 from Thordarson and Self, 2003).
Note the similarity in location of the highest temperatures with the distribution of ash from Eyjafjallajökull just 83 km southwest of Laki. Ash distribution was estimated as of Apr 15, 2010, at 18:00 by the UK Met Office. The first major eruption of Eyjafjallajökull began early on April 14, 2010.