Articles | Volume 15, issue 1
Nonlin. Processes Geophys., 15, 25–32, 2008
https://doi.org/10.5194/npg-15-25-2008

Special issue: Extreme Events: Nonlinear Dynamics and Time Series Analysis

Nonlin. Processes Geophys., 15, 25–32, 2008
https://doi.org/10.5194/npg-15-25-2008

  28 Jan 2008

28 Jan 2008

Sequence of eruptive events in the Vesuvio area recorded in shallow-water Ionian Sea sediments

C. Taricco, S. Alessio, and G. Vivaldo C. Taricco et al.
  • Dipartimento di Fisica Generale dell'Università, V. Pietro Giuria 1, 10125 Torino, Italy and Istituto di Fisica dello Spazio Interplanetario (IFSI)-INAF, C. Fiume 4, 10133 Torino, Italy

Abstract. The dating of the cores we drilled from the Gallipoli terrace in the Gulf of Taranto (Ionian Sea), previously obtained by tephroanalysis, is checked by applying a method to objectively recognize volcanic events. This automatic statistical procedure allows identifying pulse-like features in a series and evaluating quantitatively the confidence level at which the significant peaks are detected. We applied it to the 2000-years-long pyroxenes series of the GT89-3 core, on which the dating is based. The method confirms the dating previously performed by detecting at a high confidence level the peaks originally used and indicates a few possible undocumented eruptions. Moreover, a spectral analysis, focussed on the long-term variability of the pyroxenes series and performed by several advanced methods, reveals that the volcanic pulses are superimposed to a millennial trend and a 400 years oscillation.