Dynamic feeder dyke systems in basaltic volcanoes: the exceptional example of the 1809 Etna eruption (Italy)

摘要: In this paper, we describe the 1809 eruption of Mt. Etna, Italy, which represents one historical and rare case in it is possible to closely observe internal structure feeder system. This thanks presence two large pit craters located middle eruptive fracture field that allow studying a section shallow Along walls these craters, analysed well-exposed cross sections uppermost 15–20 m system related volcanic products. Here, structure, morphology lithology portion system, including host rock conditioned propagation dyke, compare results with other recent eruptions. Finally, propose dynamic model magma behaviour inside laterally–propagating demonstrating how triggered important changes style (from effusive/Strombolian phreatomagmatic) during same eruption. therefore an exceptional understand basaltic magmas move fissure. Our are also useful for hazard assessment development flank eruptions, potentially most hazardous type from volcanoes densely urbanized areas like those at Etna.