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Open-File Report 2013–1122

User’s Guide and Reference to Ash3d—A Three-Dimensional Model for Eulerian Atmospheric Tephra Transport and Deposition

By Larry G. Mastin, Michael J. Randall, Hans F. Schwaiger, and Roger P. Denlinger

Thumbnail of and link to report PDF (5.1 MB)Abstract

Ash3d is a three-dimensional Eulerian atmospheric model for tephra transport, dispersal, and deposition, written by the authors to study and forecast hazards of volcanic ash clouds and tephra fall. In this report, we explain how to set up simulations using both a web interface and an ASCII input file, and how to view and interpret model output. We also summarize the architecture of the model and some of its properties.

First posted August 23, 2013

For additional information contact:
Contact CVO
Volcano Science Center,
Cascades Volcano Observatory
U.S. Geological Survey
1300 SE Cardinal Court,
Building 10, Suite 100
Vancouver, WA 98683-9589

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Suggested citation:

Mastin, L.G., Randall, M.J., Schwaiger, H.F., and Denlinger, R.P., 2013, User’s guide and reference to Ash3d—A three-dimensional model for Eulerian atmospheric tephra transport and deposition: U.S. Geological Survey Open-File Report 2013–1122, 48 p.,




Model Overview

Examples of Model Output

The Web Interface

Modeling from the Command Line

Concluding Remarks

References Cited

Appendix: Example Ash3d input file

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