According to current geological theory, the melting of ice at the end of the Ice Age significantly reduced the weight pressing on parts of the earth' s crust  As a result, lasting cracks in the earth' s crust appeared in some of those parts under the stress of pressure from below  At the end of the Ice Age Sweden was racked by severe earthquakes
Ttherefore, it is likely that the melting of the ice contributed to these earthquakes
Severe earthquakes are generally caused by cracking of the earth's crust near the earthquake site.