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...

1st IAVCEI/GVM Workshop: "From Volcanic Hazard to Risk Assessment", Geneva, 27-29 June 2018

18 Dec 2018 | Contributor(s): Costanza Bonadonna, Sebastien Biass, Eliza S Calder, Corine Frischknecht, Chris Eric Gregg, Susanna Jenkins, Sue C Loughlin, Scira Menoni, Shinji Takarada, Tom Wilson

The complexity of volcanic risk analysis typically resides in the interaction of multiple hazard, vulnerability and exposure aspects dynamically acting over various spatial and temporal scales. Risk analyses provide an evidence-based approach to development and implementation of proactive...

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...

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...

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...

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...

La erupción del volcán Calbuco en 2015: Volcanología, sociedad y ecosistemas

25 Apr 2017 | Contributor(s): Jorge E. Romero

La erupción del 22-23 de abril de 2015 del Volcán Calbuco tuvo impactos en las actividades sociales y ecosistemas en el sur de Chile y en Argentina, debido a la espesa caída de piroclastos, corrientes calientes de gases y rocas, además de flujos de lodo...

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...

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...

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...

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...

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...

VUELCO- Dominica Exercise Debriefing Report

18 Jun 2015 | Contributor(s): Stefano Ciolli, Richard E.A. Robertson

Document summarizing the debriefing of the exercise, developed with the contribution of all the involved partners.

Insights from Volcanic Unrest Simulation Exercises

18 Jun 2015 | Contributor(s): Stefano Ciolli, Chiara Cristiani

Lecture given during the second VUELCO short-course, held in Dominica on 13th and 14th May 2015. 

Volcanic risk management in Italy: a perspective from a decision maker.

23 Apr 2015 | Contributor(s): Stefano Ciolli

Lecture given to the 1st VUELCO workshop held in Colima (Mexico) during the 7th Cities on Volcanoes Conference, 18th November 2012

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...

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.

Civil protection exercises for volcanic risk management. The VUELCO experience at midway.

20 Nov 2014 | Contributor(s): Stefano Ciolli, Chiara Cristiani

This lecture was given during the short-course titled "Coping with volcanic unrest" held in Quito (Ecuador) on November 2014.The presentation illustrates some essential key-elements to take into account in the preparation of a simulation exercise, providing useful suggestion taken...

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.