The volcano on the tiny Sicilian island of Stromboli erupted in a shower of small stones and ash, but the island's few hundred residents were not in any danger, authorities said Friday. Experts were monitoring the activity of the volcano, which erupted late Thursday, Italy's Civil Protection agency said. Stromboli, 60 kilometers north of Sicily, is noted for frequent, minor eruptions and attracts tourists keen to see the flow of lava inching down the side of the volcano. It is the northernmost of seven islands in the Aeolian archipelago north of Sicily. Last month, the volcano suddenly spewed lava into the sea, prompting authorities to warn islanders about the risk of a small tsunami.