Giorgio Lacanna

TL;DR: In this paper, the authors show how uncertainties can be reduced if mass eruption rate (MER) is derived directly from geophysical observations of source dynamics, which can improve the forecasting of volcano-related hazards with important implications for civil aviation safety.

TL;DR: The Stromboli volcano erupted on February 27, 2007, after an intense Strombolian activity lasted about 2 months as mentioned in this paper, which was monitored by an integrated network of multiparameter instruments: broad-band seismometers, infrasonic array, thermal cameras and bore-hole tiltmeters.

TL;DR: In this article, the authors used a network of stations to perform systematic radon surveys at Stromboli volcano and found that radon emissions reflect changes in volcanic activity and exhibit increasing trends prior and during the last major eruptive cycles.

TL;DR: In this paper, the anomalous amplitude distribution of the acoustic waves at Stromboli is not necessarily due to the source radiation pattern but it is strongly influenced by the topography of the ground-atmosphere interface.

Abstract: [1] The sudden ejection of material during an explosive eruption generates a broad spectrum of pressure oscillations, from infrasonic to gravity waves. An infrasonic array, installed at 3.5 km from the Soufriere Hills Volcano has successfully detected and located, in real-time, the infrasound generated by several pyroclastic flows (PF) estimating mean flow speeds of 30–75 m/s. On July 29 and December 3, 2008, two differential pressure transducers, co-located with the array, recorded ultra long-period (ULP) oscillations at frequencies of 0.97 and 3.5 mHz, typical of atmospheric gravity waves, associated with explosive eruptions. The observation of gravity waves in the near-field (<6 km) at frequencies as low as about 1 mHz is unprecedented during volcanic eruptions.