caa a22 4500 475826035 CHVBK 20180406123828.0 cr unu---uuuuu 170329e20000201xx s 000 0 eng 10.1007/s004450050002 doi (NATIONALLICENCE)springer-10.1007/s004450050002 New formulae for estimating lava flow volumes at Mt. Etna Volcano, Sicily [Elektronische Daten] [J. B. Murray, N. F. Stevens]  A new data set of Etna lava flows erupted since 1868 has been compiled from eight topographic maps of the volcano published at intervals since then. Volumes of 59 flows or groups of flows were measured from topographic difference maps. Most of these volumes are likely to be considerably more accurate than those published previously. We cut the number of flow volumes down to 25 by selecting those examples for which the volume of an individual eruption could be derived with the highest accuracy. This refined data set was searched for high correlations between flow volume and more directly measurable parameters. Only two parameters showed a correlation coefficient of 70% or greater: planimetric flow area A (70%) and duration of the eruption D (79%). If only short duration (<18 days) flows were used, flow length cubed, L3, had a correlation coefficient of 98%. Using combinations of measured parameters, much more significant correlations with volume were found. Dh had a correlation coefficient of 90% (h is the hydrostatic head of magma above the vent), and  , 92% (where W is mean width and E is the degree of topographic enclosure), and a combination of the two , 97%. These latter formulae were used to derive volumes of all eruptions back to 1868 to compare with those from the complete data set. Values determined from the formulae were, on average, lower by 16% (Dh), 7% ( , and 19% . Springer-Verlag Berlin Heidelberg, 2000 Key words Lava flow nationallicence Lava volume nationallicence Lava output nationallicence Mount Etna nationallicence Time series nationallicence Flow morphometry nationallicence Murray J. B. Department of Earth Sciences, The Open University, Milton Keynes, MK7 6AA, UK e-mail: j.b.murray@open.ac.uk Fax: +44-1908-655151, GB aut Stevens N. F. Department of Earth Sciences, The Open University, Milton Keynes, MK7 6AA, UK e-mail: j.b.murray@open.ac.uk Fax: +44-1908-655151, GB aut https://doi.org/10.1007/s004450050002 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s004450050002 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Murray J. B. Department of Earth Sciences, The Open University, Milton Keynes, MK7 6AA, UK e-mail: j.b.murray@open.ac.uk Fax: +44-1908-655151, GB aut NATIONALLICENCE 700 1- Stevens N. F. Department of Earth Sciences, The Open University, Milton Keynes, MK7 6AA, UK e-mail: j.b.murray@open.ac.uk Fax: +44-1908-655151, GB aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer