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Tephra 2017 Workshop : Best practices in tephra collection, analysis, and reporting leading toward better tephra databases
15 Jun 2017 | Contributor(s): Marcus I Bursik, Stephen C Kuehn, Kristi L Wallace, Andrei V Kurbatov
Best practices in tephra collection, analysis, and reporting: Leading toward better tephra databasesThis is a page for the Tephra 2017 workshop, held in Portland, OR, 19 August 2017. The workshop was a follow-on to the Tephra 2014 workshop, held 3-7 August 2014, also in...
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TephraProb: a Matlab package for probabilistic hazard assessments of tephra fallout
15 Sep 2016 | Contributor(s): Sebastien Biass, Costanza Bonadonna, Laura J Connor, Chuck B Connor
Download the code on GitHub: https://github.com/e5k/TephraProbFollow updates on: https://e5k.github.io/TephraProb is a toolbox of Matlab functions designed to produce scenario–based probabilistic hazard assessments for ground tephra accumulation. The toolbox includes a series of...
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Documentation for "Effect of particle entrainment on the runout of pyroclastic density currents"
08 Sep 2016 | Contributor(s): Kristen Fauria, Michael Manga, Michael Chamberlain
This is a repository for the data and script used in, "Effect of particle entrainment on the runout of pyroclastic density currents."Here you will find:1. A compilation of splash function experimental data from this study and data that was extracted from seven other studies:...
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Maar-diatremes - a course module
13 Jun 2016 | Contributor(s): Greg A Valentine, Alison Graettinger
Maar-diatremes are one of the most common volcanic landforms on Earth, and represent an end-member type of volcano whose eruptions are dominated by explosive, subsurface magma-water interaction. Thus they should form an important component of volcanology courses. The recent decade has...
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Confort 15 (Conflow improvement)
20 Jan 2015 | Contributor(s): Silvia Campagnola, Claudia Romano, Larry G Mastin, Alessandro Vona
We present an updated version of the Conflow model, an open-source numerical model for flow in eruptive conduits during steady-state pyroclastic eruptions (Mastin and Ghiorso, 2000). In the Confort 15 program, several updates were considered:The rheological parameters of the model are...
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Tephra isopach, extent and volume calculation in R
04 Mar 2016 | Contributor(s): Qingyuan Yang, Marcus I Bursik
The method presented here is used to interpolate the thickness distribution of tephra fall deposits from point measurements. It first reconstructs the general thickness decay pattern, or "trend," and then models the residuals that cannot be explained by the trend with...
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A Matlab implementation of the Carey and Sparks (1986) model
04 Nov 2015 | Contributor(s): Sebastien Biass, Gholamohssein Bagheri, Costanza Bonadonna
Download the code on GitHub: https://github.com/e5k/CareySparks86_MatlabFollow updates on: https://e5k.github.io/ This file is a Matlab implementation of the Carey and Sparks (1986) model to estimate i) the plume height above sampling altitude and ii) the wind speed at the...
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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...
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Tephra 2014-2020 Document Repository
01 Jul 2015 | Contributor(s): Marcus I Bursik, Solene Pouget, Stephen C Kuehn, Kristi L Wallace, Andrei V Kurbatov
Beginning with the consensus document (with three appendices) resulting from the Tephra 2014 Workshop, this is the document repository for the Tephra 2014, 2017 and 2019 Workshops on standardization.The immediate goal of the tephra standardization effort is to translate checklists...
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Spread sheet to calculate tephra volume for exponential thinning
10 Apr 2015 | Contributor(s): Manuel Nathenson, Judy Fierstein
An Excel spread sheet and instructions are provided to calculate tephra volume for exponential thinning on a log(thickness) versus square root of area plot. The spread sheet calculates volumes for a single straight line and for two straight lines. The equations for the calculations are from...
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Tephra 2014 Field Trip Guide
08 Dec 2014 | Contributor(s): Stephen C Kuehn
Guidebook for the field trip to Mount Saint Helens conducted 4-August-2014 as part of the Tephra 2014 workshop.
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Geochemistry and Petrology first response draft
28 Aug 2014 | Contributor(s): Gudmundur H Gudfinnsson, Armann Hoskuldsson, Níels Örn Óskarsson
Here are the documents which were presented at the meeting on the 27th of August. Please feel free to download, edit, and then update the files stored here.
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Chaotic Mixing Device
09 May 2014 | Contributor(s): Daniele Morgavi, Diego Perugini, Cristina P. De Campos, Werner Ertel-Ingrisch, Donald B. Dingwell
Description of device for chaotic mixing experiments developed at LMU München
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TOTGS: Total grainsize distribution of tephra fallout
20 Jan 2014 | Contributor(s): Seb Biass, Costanza Bonadonna
NOTE The code is now maintained on GitHub: https://github.com/e5k/TOTGS Follow updates on: https://e5k.github.io/ Quantifying the total grainsize distribution (TGSD) is a necessary step to achieve a thorough characterization of a given tephra deposit. Several methods exist to...
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Tephra 2014 - Maximizing the potential of tephra for multidisciplinary science
09 Jan 2014 | Contributor(s): Steven Kuehn, Solene Pouget, Marcus I Bursik
Tephra deposits are used by diverse communities: volcanologists, petrologists, tephrochronologists, paleoclimatologists, paleoecologists and archaeologists. To perhaps be too reductionist, volcanologists are generally interested in tephra to understand eruption behavior, frequency, and hazards;...
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Olive
23 Jul 2013 | *Tools | Contributor(s): Joaquin Alberto Cortes
Olive 2.1.1 a simple fractional crystallization calculator.
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Tritone
13 Mar 2013 | *Tools | Contributor(s): Joaquin Alberto Cortes
Tritone a mini tool to plot ternary diagrams
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Disaster Zone - Montserrat Factsheet
27 Feb 2013 | Educational Materials | Contributor(s): Jeannie A.J. Scott
A factsheet on the Montserrat volcanic crisis. This was designed to suit the UK GCSE Geography curriculum, so very little science is included!
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Disaster Zone - Rocks
26 Feb 2013 | Educational Materials | Contributor(s): Jeannie A.J. Scott
See volcanic rocks up close and under the microscope. Part of the "Disaster Zone" stall / educational resource; suitable for all ages, although younger children must be supervised.
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Disaster Zone - Make-a-Quake!
26 Feb 2013 | Educational Materials | Contributor(s): Jeannie A.J. Scott
An activity for all ages - build houses from Lego and Jenga blocks, then make an "earthquake" to see how well they survive; monitor the "seismic" waves on a laptop. Part of the "Disaster Zone" stall / educational resource; use as a stall activity or in the classroom.