INGV reported that eruptive activity continued at Stromboli during 17-23 June. Webcam images showed Strombolian activity at three vents in Area N (two at N1 and one at N2), within the upper part of the Sciara del Fuoco, and from two vents at S2 in Area C-S (South-Central Crater) on the crater terrace. During the week low- to medium-intensity explosive activity at N1 and N2 ejected coarse material (bombs and lapilli) less than 150 m above the vents. The average rate of explosions from this area was 6-14 events per hour. Spattering occurred at N1 and was intense at times. At Area C-S, explosive activity in sector S2 ejected both coarse and fine material as high as 150 m above the vent. The average explosion rate was 5-8 events per hour. At 1225 on 23 June lava began to overflow N1 after a period of intense spattering. Multiple lava flows from N1 converged in the channel scoured out by the 9 October 2022 pyroclastic flow and descended the upper part of the Sciara del Fuoco. Within a few hours activity decreased and by 2100 the flows were cooling. On 24 June Dipartimento della Protezione Civile raised the Alert Level to Orange (the second highest level on a four-level scale), noting the overflow at N1, frequent explosions in Area C-S, and an increase in tremor amplitude.

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)