Tephra inversion with Tephra2 and the Metropolis-Hastings algorithm
23 Jan 2022
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...
A new method to identify the vent location of tephra fall deposits based on thickness or maximum clast size measurements (SVL)
17 Apr 2018
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...
INQUA–INTAV International Field Conference and Workshop: Crossing New Frontiers
14 Mar 2018
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...
PYFLOW_2.0. A new tool for estimating the impact parameters and the deposition rate and time of dilute PDCs based on field data
22 Nov 2017 | Contributor(s): Marcus I Bursik
PYFLOW_2.0 is a hazard tool for the calculation of the impact parameters of dilute pyroclastic density currents (DPDCs). DPDCs represent the dilute turbulent type of gravity flows that occur during explosive volcanic eruptions; their hazard is the result of their mobility and the capability...
Mono-Inyo Tephra Database
01 Aug 2017
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...
Tephra 2017 Workshop : Best practices in tephra collection, analysis, and reporting leading toward better tephra databases
15 Jun 2017
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...
TephraProb: a Matlab package for probabilistic hazard assessments of tephra fallout
15 Sep 2016
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...
Documentation for "Effect of particle entrainment on the runout of pyroclastic density currents"
08 Sep 2016 | Contributor(s): Marcus I Bursik
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:...
Maar-diatremes - a course module
23 Jan 2022
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...
Confort 15 (Conflow improvement)
23 Jan 2022 | Contributor(s): Marcus I Bursik
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...
Tephra isopach, extent and volume calculation in R
23 Jan 2022
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...
A Matlab implementation of the Carey and Sparks (1986) model
23 Jan 2022
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...
Tephra 2014-2020 Document Repository
01 Jul 2015
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...
Spread sheet to calculate tephra volume for exponential thinning
10 Apr 2015
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...
Tephra 2014 Field Trip Guide
08 Dec 2014
Guidebook for the field trip to Mount Saint Helens conducted 4-August-2014 as part of the Tephra 2014 workshop.
Geochemistry and Petrology first response draft
28 Aug 2014 | Contributor(s): Leah Michelle Courtland, Chuck B Connor, Laura Connor, Costanza Bonadonna
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.
Chaotic Mixing Device
09 May 2014 | Contributor(s): Leah Michelle Courtland, Chuck B Connor, Laura Connor, Costanza Bonadonna
Description of device for chaotic mixing experiments developed at LMU München
TOTGS: Total grainsize distribution of tephra fallout
20 Jan 2014
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...
Tephra 2014 - Maximizing the potential of tephra for multidisciplinary science
23 Jan 2022
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;...
23 Jan 2022 | Tools | Contributor(s): Leah Michelle Courtland, Chuck B Connor, Laura Connor, Costanza Bonadonna
Olive 2.1.1 a simple fractional crystallization calculator.