Citizens of Santorini a small Greek island have felt several small tremor and have smelt some unusual things in the past year. The cause of these strange occurrences is the active volcano that the island rests upon. Although geologists do not believe it is the preamble for an impending eruption, people are on their toes. The cause of the sudden shifts and tremors was a rush of molten rock swelling into a magma chamber under the volcano. If I were living there i would have packed up my thing and left the even slightest chance of a volcanic eruption happening right below my feet would scare me enough to move. Hope it does not explode and everyone remains safe.