Abstract
PROF. A. RICCO, director of the Observatory of Catania, has issued a preliminary report on the eruption of Etna which took place last September (Boll. Sismol. Soc. Ital., vol. xv., pp. 273–280). The eruption may be said to have begun on the preceding May 27, when a new vent appeared on the northeast flank of the central crater less than a hundred metres below the rim, from which there issued hot white smoke, but no solid matter. In August, rumblings were heard in the central crater and in the new vent, and, from both, smoke and lapilli were discharged. This continued until the night of September 9–10, when a series of very strong earthquakes occurred, and a great radial fracture, eight kilometres in length, was formed, running in a N.N.E. direction from the new vent. Some of the earthquakes were felt as far as Mineo, 60 km. from the volcano. In the Observatory of.Catania, 30 km. distant, the Vicentini microseismograph was almost continuously agitated from midnight to 6 a.m. on September 10. The strongest shock occurred at 2.14 a.m., and at the same moment a new vent was opened, about 4 km. from the central crater, from which smoke, ashes, lapilli, and stones were ejected. Later in the day, three new vents were opened, and by the next day there were sixteen in action, of which two emitted lava.
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D., C. The Etnean Eruption of September, 1911 . Nature 89, 149–150 (1912). https://doi.org/10.1038/089149a0
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DOI: https://doi.org/10.1038/089149a0