INGV reported two episodes of effusive activity at Stromboli, one on 17 June and another on 22 June. Activity on 17 June occurred in the morning within the central part of the crater terrace (Bocca S2) and included explosive spattering. This activity lasted for a few hours and produced a small lava flow directed toward Pizzo Sopra la Fossa. A sharp increase in Strombolian activity began from all of the craters on 22 June, depositing voluminous material along the Sciara del Fuoco. A lava flow ~200 m long extended from the mouth of N2 (within the N part of the crater terrace). During the evening this flow slowed, and then stalled the following day when Strombolian activity decreased.

Geological Summary. Spectacular incandescent nighttime explosions at Stromboli have long attracted visitors to the "Lighthouse of the Mediterranean" in the NE Aeolian Islands. This volcano has lent its name to the frequent mild explosive activity that has characterized its eruptions throughout much of historical time. The small island is the emergent summit of a volcano that grew in two main eruptive cycles, the last of which formed the western portion of the island. The Neostromboli eruptive period took place between about 13,000 and 5,000 years ago. The active summit vents are located at the head of the Sciara del Fuoco, a prominent scarp that formed about 5,000 years ago due to a series of slope failures which extends to below sea level. The modern volcano has been constructed within this scarp, which funnels pyroclastic ejecta and lava flows to the NW. Essentially continuous mild Strombolian explosions, sometimes accompanied by lava flows, have been recorded for more than a millennium.

Source: Sezione di Catania - Osservatorio Etneo (INGV)