Articles | Volume 6, issue 3
Short communication
24 Jul 2015
Short communication |  | 24 Jul 2015

Revisiting the statistical analysis of pyroclast density and porosity data

B. Bernard, U. Kueppers, and H. Ortiz

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Cited articles

Alidibirov, M. and Dingwell, D. B.: High temperature fragmentation of magma by rapid decompression, Nature, 380, 146–149, 1996.
Belousov, A., Voight, B., Belousova, M.: Directed blasts and blast-generated pyroclastic density currents: a comparison of the Bezymianny 1956: Mount St. Helens 1980 and Soufrière Hills, Montserrat 1997 eruptions and deposits, B. Volcanol., 69, 701–740, 2007.
Bernard, B., Hidalgo, S., Robin, C., Beate, B., Quijozaca, J.: The 3640–3510 BC rhyodacite eruption of Chachimbiro compound volcano, Ecuador, a violent directed blast produced by a satellite dome, B. Volcanol., 76, 1–20,, 2014.
Cashman, K. and McConnell, S.: Multiple levels of magma storage during the 1980 summer eruptions of Mount St. Helens, WA, B. Volcanol., 68, 57–75, 2005.
Eychenne, J. and Le Pennec, J.-L.: Sigmoidal Particle Density Distribution in a Subplinian Scoria Fall Deposit, B. Volcanol., 74, 2243–2249,, 2012.
Short summary
This paper presents a new methodology to treat statistically pyroclast density and porosity data sets introducing a weighting parameter. It also proposes a stability analysis to check if the sample set is large enough for statistical reliability. Finally we introduce graphical statistics to improve distinction between pyroclastic deposits and understanding of eruptive dynamics. An open source R code is supplied that includes all these features in order to facilitate data processing.