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...