Tags: ash deposits

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  1. Workshop on Wind-remobilisation processes of volcanic ash, Consensual Document

    20 Feb 2020 | Contributor(s):: Costanza Bonadonna, Paul A Jarvis, Lucia Dominguez, Corine Frischknecht, Pablo Forte, Donaldo Bran, Rigoberto Aguilar, Frances Beckett, Manuela Elissondo, Jack Gillies, ulrich kueppers, Jonathan Merrison, Nick Varley, Kristi L Wallace

    Explosive volcanic eruptions can eject large quantities of tephra into the atmosphere that can be dispersed and deposited over wide areas. Whilst the hazardous consequences of primary tephra fallout are well known, subsequent remobilisation of ash by aeolian processes can continue to present an...

  2. ASHEE

    14 Aug 2015 | Contributor(s):: Matteo Cerminara, Tomaso Esposti Ongaro

    A fluid-dynamic model is developed to numerically simulate the non-equilibrium dynamics of polydisperse gas-particle mixtures forming volcanic plumes. Starting from the three-dimensional N-phase Eulerian transport equations for a mixture of gases and solid particles, we adopt an asymptotic...

  3. Sequential fragmentation/transport model applied to Irazu volcano, Costa Rica. Positive dispersion case

    21 Mar 2015 | Contributor(s):: Jose Brenes

    Sequential fragmentation/transport model was applied to ash deposits of 1723 eruption of  Irazu volcano, Costa Rica.  Some 25% of the sub-populations showed positive dispersion values, which were associated to a new fractal dimension,. With the help of Mandelbrot fractal relationship...

  4. Mitsuhiro Yoshimoto


  5. Thomas Ryan Knott


  6. AshCalc

    22 Feb 2014 | | Contributor(s):: Matthew Daggitt, David Pyle, Tamsin Alice Mather

    Calculates exponential, power law and Weibull distributions for tephra volumes from isopach data.

  7. PyFlow

    07 May 2014 | | Contributor(s):: Fabio Dioguardi, Pierfrancesco Dellino, Daniela Mele

    PYFLOW is a multi-block code for the calculation of the flow field variables of dilute pyroclasticdensity currents (hereafter DPDCs) starting from the deposits characteristics. The code, written inFortran 90, solves an improved version of the model of Dellino et al. (2008): it calculates...

  8. Pooja Vinod Kshirsagar

    I am currently working on the monogenetic volcanic field of MGVF, Mexico. I study the surge-deposits of maars and tuff cones, associated mainly with the Pleistocene volcanic event and try to...