Sareyn Sareyn Sareyn (, also Romanized as Sar‘eyn, Sara’eyn, Sar‘eīn, Sar ‘Eyn, and Sarein) is a city in and the capital of Sareyn County, in Ardabil Province, Iran. Sareyn is known for its hot springs. The population is about 8000, and increases to more than 20000 in the summer because of the many tourists who go there due to the charming climate. It stands 25 km from Ardabil and total area is 1.28 square km. At the 2006 census, its population was 4,478, in 1,135 families. The Sareyn springs are near an inactive volcano in mount Sabalan and its water contains
Volcano of classifying magmatic volcanoes is by their frequency of eruption, with those that erupt regularly called active, those that have erupted in historical times but are now quiet called dormant or inactive, and those that have not erupted in historical times called extinct. However, these popular classifications—extinct in particular—are practically meaningless to scientists. They use classifications which refer to a particular volcano's formative and eruptive processes and resulting shapes. There is no consensus among volcanologists on how to define an "active" volcano. The lifespan of a volcano can vary from months to several million years, making such a distinction sometimes