Strombolicchio is a sea stack of volcanic origin 2 km (1.2 mi) to the northeast of the island of Stromboli in the Aeolian Islands of Italy.Geologically, Strombolicchio is a volcanic plug or spine of extremely hard compacted basalt resistant to erosion, and is the remnant of the original volcano from which the island of Stromboli was built up. Eruptions at this site ceased approximately 200,000 years ago. Since then the volcanic activity has moved about 3 km (1.9 mi) to the southwest.