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Tephra inversion with Tephra2 and the Metropolis-Hastings algorithm
21 Jun 2020 | Contributor(s):: Qingyuan Yang, E Bruce Pitman, Marcus I Bursik, Susanna Jenkins
We couple the Metropolis-Hastings algorithm (Hastings, 1970) with the volcanic ash transport model Tephra2 (Bonadonna et al, 2005; 2010), and present the coupled algorithm as a new method to estimate the Eruption Source Parameters (ESPs) of volcanic eruptions based on mass per unit area...
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Marco Daniel Cordova
https://theghub.org/members/12201
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Workshop Description
The Tephra 2014 Workshop was convened 3-7 August, 2014, to discuss major developments, best practices, and future directions/needs in tephra studies from both volcanological and tephrochronological...
https://theghub.org/groups/tephra2014/wiki/MainPage
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A new method to identify the vent location of tephra fall deposits based on thickness or maximum clast size measurements (SVL)
17 Apr 2018 | Contributor(s):: Qingyuan Yang, Marcus I Bursik, E Bruce Pitman
This tool presents a new method to identify the vent location of tephra fall deposits based on thickness or maximum clast size measurements. It is temporarily named "svl", which is short for Source Vent Locator. The method estimates the vent location by coupling semi-empirical models...
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INQUA–INTAV International Field Conference and Workshop: Crossing New Frontiers
14 Mar 2018 | Contributor(s):: Marcus I Bursik
The INQUA International Focus Group on Tephrochronology and Volcanism (INTAV) cordially invites you to participate in the Crossing New Frontiers - Tephra Hunt in Transylvania international field conference that aims to continue the long tradition of very successful inter-INQUA congress tephra...
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Mono-Inyo Tephra Database
01 Aug 2017 | Contributor(s):: Marcus I Bursik
The Mono-Inyo Craters is a zone of active volcanism in California, USA, that extends from Mammoth Mountain and Long Valley caldera in the south to the islands of Mono Lake in the north. This resource provides the citation for the Mono-Inyo tephra database. The database can...
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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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Marcus Phua
https://theghub.org/members/5747
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Holocene Mono Tephra Geochemistry Data
28 Feb 2017 | Contributor(s):: Thomas J Scialo, Marcus I Bursik
Collection of data sheets and reports on T. Scialo tephra analysis project of Holocene Mono Craters tephra.
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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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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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Diego José Moreta
https://theghub.org/members/4778
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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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KEVIN ARNOLD CUEVA
https://theghub.org/members/4286
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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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Parissa Kokabi
https://theghub.org/members/3883