Validation data for manuscript "Novel statistical emulator construction for volcanic ash transport model Ash3d with physically-motivated measures"

02 Sep 2020 | Contributor(s): Qingyuan Yang, E Bruce Pitman, Elaine Spiller, Marcus I Bursik, Andrea Bevilacqua

This database presents the testing and validation data used and presented in the manuscript titled "Novel statistical emulator construction for volcanic ash transport model Ash3d with physically-motivated measures". The manuscript is submitted to the Proceedings of the Royal...

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...

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...

Updated version of an algorithm for tephra isopach, extent and volume calculation in R

18 Oct 2016 | Contributor(s): Marcus I Bursik, Qingyuan Yang

We have updated an algorithm that aids in isopach construction, and volume and extent calculation of tephra fall deposits.  The program is written in R.  Documentation has been improved, and we now include example datasets for the North Mono eruption and Fogo A.  The algorith and...

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...